pref: 异步状态机优化

src/Admin/ThingsGateway.NewLife.X/Collections/NonBlockingDictionary/ConcurrentDictionary/DictionaryImpl`2.cs

@@ -4,7 +4,6 @@
 
 #nullable disable
 
-using System.Collections;
 using System.Runtime.CompilerServices;
 
 namespace System.Collections.Concurrent

src/Admin/ThingsGateway.NewLife.X/Collections/NonBlockingDictionary/NonBlockingDictionary.cs

@@ -5,12 +5,10 @@
 #nullable disable
 #pragma warning disable CS8632 // The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.
 
-using System.Collections;
 using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
-using System.Collections.Concurrent;
 
 using static System.Collections.Concurrent.DictionaryImpl;
 

src/Admin/ThingsGateway.NewLife.X/Collections/ObjectPool.cs

@@ -31,8 +31,8 @@ public class ObjectPool<T> : DisposeBase, IPool<T> where T : notnull
     /// <summary>最小个数。默认1</summary>
     public Int32 Min { get; set; } = 1;
 
-    /// <summary>空闲清理时间。最小个数之上的资源超过空闲时间时被清理，默认10s</summary>
-    public Int32 IdleTime { get; set; } = 10;
+    /// <summary>空闲清理时间。最小个数之上的资源超过空闲时间时被清理，默认60s</summary>
+    public Int32 IdleTime { get; set; } = 60;
 
     /// <summary>完全空闲清理时间。最小个数之下的资源超过空闲时间时被清理，默认0s永不清理</summary>
     public Int32 AllIdleTime { get; set; } = 0;
@@ -126,9 +126,7 @@ public class ObjectPool<T> : DisposeBase, IPool<T> where T : notnull
                 if (Max > 0 && count >= Max)
                 {
                     var msg = $"申请失败，已有 {count:n0} 达到或超过最大值 {Max:n0}";
-
                     WriteLog("Acquire Max " + msg);
-
                     throw new Exception(Name + " " + msg);
                 }
 
@@ -268,7 +266,7 @@ public class ObjectPool<T> : DisposeBase, IPool<T> where T : notnull
         {
             if (_timer != null) return;
 
-            _timer = new TimerX(Work, null, 5000, 5000) { Async = true };
+            _timer = new TimerX(Work, null, 60000, 60000) { Async = true };
         }
     }
 
@@ -281,7 +279,7 @@ public class ObjectPool<T> : DisposeBase, IPool<T> where T : notnull
         var count = 0;
 
         // 清理过期不还。避免有借没还
-        if (!_busy.IsEmpty)
+        if (AllIdleTime > 0 && !_busy.IsEmpty)
         {
             var exp = TimerX.Now.AddSeconds(-AllIdleTime);
             foreach (var item in _busy)

src/Admin/ThingsGateway.NewLife.X/Collections/ObjectPoolLock.cs

@@ -0,0 +1,262 @@
+using ThingsGateway.NewLife.Log;
+using ThingsGateway.NewLife.Reflection;
+
+namespace ThingsGateway.NewLife.Collections;
+
+/// <summary>资源池。支持空闲释放，主要用于数据库连接池和网络连接池</summary>
+/// <remarks>
+/// 文档 https://newlifex.com/core/object_pool
+/// </remarks>
+/// <typeparam name="T"></typeparam>
+public class ObjectPoolLock<T> : DisposeBase, IPool<T> where T : class
+{
+    #region 属性
+    /// <summary>名称</summary>
+    public String Name { get; set; }
+
+    private Int32 _FreeCount;
+    /// <summary>空闲个数</summary>
+    public Int32 FreeCount => _FreeCount;
+
+    private Int32 _BusyCount;
+    /// <summary>繁忙个数</summary>
+    public Int32 BusyCount => _BusyCount;
+
+    /// <summary>最大个数。默认0，0表示无上限</summary>
+    public Int32 Max { get; set; } = 0;
+
+    /// <summary>最小个数。默认1</summary>
+    public Int32 Min { get; set; } = 1;
+
+    private readonly object _syncRoot = new();
+
+    /// <summary>基础空闲集合。只保存最小个数，最热部分</summary>
+    private readonly Stack<T> _free = new();
+
+    /// <summary>扩展空闲集合。保存最小个数以外部分</summary>
+    private readonly Queue<T> _free2 = new();
+
+    /// <summary>借出去的放在这</summary>
+    private readonly HashSet<T> _busy = new();
+
+    //private readonly Object SyncRoot = new();
+    #endregion
+
+    #region 构造
+    /// <summary>实例化一个资源池</summary>
+    public ObjectPoolLock()
+    {
+        var str = GetType().Name;
+        if (str.Contains('`')) str = str.Substring(null, "`");
+        if (str != "Pool")
+            Name = str;
+        else
+            Name = $"Pool<{typeof(T).Name}>";
+
+    }
+    ~ObjectPoolLock()
+    {
+        this.TryDispose();
+    }
+    /// <summary>销毁</summary>
+    /// <param name="disposing"></param>
+    protected override void Dispose(Boolean disposing)
+    {
+        base.Dispose(disposing);
+
+        WriteLog($"Dispose {typeof(T).FullName} FreeCount={FreeCount:n0} BusyCount={BusyCount:n0}");
+
+        Clear();
+    }
+
+    private volatile Boolean _inited;
+    private void Init()
+    {
+        if (_inited) return;
+
+        lock (lockThis)
+        {
+            if (_inited) return;
+            _inited = true;
+
+            WriteLog($"Init {typeof(T).FullName} Min={Min} Max={Max}");
+        }
+    }
+    #endregion
+
+    #region 主方法
+    /// <summary>借出</summary>
+    /// <returns></returns>
+    public virtual T Get()
+    {
+        T? pi = null;
+        do
+        {
+            lock (_syncRoot)
+            {
+                if (_free.Count > 0)
+                {
+                    pi = _free.Pop();
+                    _FreeCount--;
+                }
+                else if (_free2.Count > 0)
+                {
+                    pi = _free2.Dequeue();
+                    _FreeCount--;
+                }
+                else
+                {
+                    var count = BusyCount;
+                    if (Max > 0 && count >= Max)
+                    {
+                        var msg = $"申请失败，已有 {count:n0} 达到或超过最大值 {Max:n0}";
+                        WriteLog("Acquire Max " + msg);
+                        throw new Exception(Name + " " + msg);
+                    }
+
+                    pi = OnCreate();
+                    if (count == 0) Init();
+
+#if DEBUG
+                WriteLog("Acquire Create Free={0} Busy={1}", FreeCount, count + 1);
+#endif
+                }
+            }
+
+            // 如果拿到的对象不可用，则重新借
+        } while (pi == null || !OnGet(pi));
+
+        lock (_syncRoot)
+        {
+            // 加入繁忙集合
+            _busy.Add(pi);
+
+            _BusyCount++;
+        }
+        return pi;
+    }
+
+    /// <summary>借出时是否可用</summary>
+    /// <param name="value"></param>
+    /// <returns></returns>
+    protected virtual Boolean OnGet(T value) => true;
+
+    /// <summary>申请资源包装项，Dispose时自动归还到池中</summary>
+    /// <returns></returns>
+    public PoolItem<T> GetItem() => new(this, Get());
+
+    /// <summary>归还</summary>
+    /// <param name="value"></param>
+    public virtual Boolean Return(T value)
+    {
+        if (value == null) return false;
+        lock (_syncRoot)
+        {
+            // 从繁忙队列找到并移除缓存项
+            if (!_busy.Remove(value))
+            {
+#if DEBUG
+            WriteLog("Return Error");
+#endif
+
+                return false;
+            }
+
+            _BusyCount--;
+        }
+
+        // 是否可用
+        if (!OnReturn(value))
+        {
+            return false;
+        }
+
+        if (value is DisposeBase db && db.Disposed)
+        {
+            return false;
+        }
+        lock (_syncRoot)
+        {
+            if (_FreeCount < Min)
+                _free.Push(value);
+            else
+                _free2.Enqueue(value);
+            _FreeCount++;
+        }
+
+        return true;
+    }
+
+    /// <summary>归还时是否可用</summary>
+    /// <param name="value"></param>
+    /// <returns></returns>
+    protected virtual Boolean OnReturn(T value) => true;
+
+    /// <summary>清空已有对象</summary>
+    public virtual Int32 Clear()
+    {
+        var count = _FreeCount + _BusyCount;
+
+        //_busy.Clear();
+        //_BusyCount = 0;
+
+        //_free.Clear();
+        //while (_free2.TryDequeue(out var rs)) ;
+        //_FreeCount = 0;
+
+        lock (_syncRoot)
+        {
+            count = _FreeCount + _BusyCount;
+
+            while (_free.Count > 0)
+            {
+                var pi = _free.Pop();
+                OnDispose(pi);
+            }
+
+            while (_free2.Count > 0)
+            {
+                var pi = _free2.Dequeue();
+                OnDispose(pi);
+            }
+
+            _FreeCount = 0;
+
+            foreach (var item in _busy)
+            {
+                OnDispose(item);
+            }
+            _busy.Clear();
+            _BusyCount = 0;
+        }
+
+        return count;
+    }
+
+    /// <summary>销毁</summary>
+    /// <param name="value"></param>
+    protected virtual void OnDispose(T? value) => value.TryDispose();
+    #endregion
+
+    #region 重载
+    /// <summary>创建实例</summary>
+    /// <returns></returns>
+    protected virtual T? OnCreate() => (T?)typeof(T).CreateInstance();
+    #endregion
+    protected object lockThis = new();
+
+    #region 日志
+    /// <summary>日志</summary>
+    public ILog Log { get; set; } = Logger.Null;
+
+    /// <summary>写日志</summary>
+    /// <param name="format"></param>
+    /// <param name="args"></param>
+    public void WriteLog(String format, params Object?[] args)
+    {
+        if (Log?.Enable != true) return;
+
+        Log.Info(Name + "." + format, args);
+    }
+    #endregion
+}

src/Admin/ThingsGateway.NewLife.X/Collections/ValueStopwatch.cs

@@ -0,0 +1,48 @@
+namespace ThingsGateway.NewLife.Collections;
+
+
+using System;
+using System.Diagnostics;
+
+internal struct ValueStopwatch
+{
+#if !NET7_0_OR_GREATER
+    private static readonly double TimestampToTicks = TimeSpan.TicksPerSecond / (double)Stopwatch.Frequency;
+#endif
+
+    private readonly long _startTimestamp;
+
+    public bool IsActive => _startTimestamp != 0;
+
+    private ValueStopwatch(long startTimestamp)
+    {
+        _startTimestamp = startTimestamp;
+    }
+
+    public static ValueStopwatch StartNew() => new ValueStopwatch(Stopwatch.GetTimestamp());
+
+    public static TimeSpan GetElapsedTime(long startingTimestamp, long endingTimestamp)
+    {
+#if !NET7_0_OR_GREATER
+        var timestampDelta = endingTimestamp - startingTimestamp;
+        var ticks = (long)(TimestampToTicks * timestampDelta);
+        return new TimeSpan(ticks);
+#else
+        return Stopwatch.GetElapsedTime(startingTimestamp, endingTimestamp);
+#endif
+    }
+
+    public TimeSpan GetElapsedTime()
+    {
+        // Start timestamp can't be zero in an initialized ValueStopwatch. It would have to be literally the first thing executed when the machine boots to be 0.
+        // So it being 0 is a clear indication of default(ValueStopwatch)
+        if (!IsActive)
+        {
+            throw new InvalidOperationException("An uninitialized, or 'default', ValueStopwatch cannot be used to get elapsed time.");
+        }
+
+        var end = Stopwatch.GetTimestamp();
+
+        return GetElapsedTime(_startTimestamp, end);
+    }
+}

src/Admin/ThingsGateway.NewLife.X/Common/ExpiringDictionary.cs

@@ -62,7 +62,7 @@ public class ExpiringDictionary<TKey, TValue> : IDisposable
         this.comparer = comparer;
         _dict = new NonBlockingDictionary<TKey, CacheItem>(comparer);
 
-        _cleanupTimer = new TimerX(TimerClear, null, 10000, 10000) { Async = true };
+        _cleanupTimer = new TimerX(TimerClear, null, 60000, 60000) { Async = true };
     }
 
     public bool TryAdd(TKey key, TValue value)

src/Admin/ThingsGateway.NewLife.X/Common/WaitLock.cs

@@ -90,15 +90,50 @@ public sealed class WaitLock : IDisposable
     /// </summary>
     public Task WaitAsync(CancellationToken cancellationToken = default)
     {
-        return _waiterLock.WaitAsync(cancellationToken);
+#if NET6_0_OR_GREATER
+        if (cancellationToken.CanBeCanceled)
+            return WaitUntilCountOrTimeoutAsync(_waiterLock.WaitAsync(Timeout.Infinite, CancellationToken.None), Timeout.Infinite, cancellationToken);
+        else
+            return _waiterLock.WaitAsync(Timeout.Infinite, CancellationToken.None);
+
+#else
+        return _waiterLock.WaitAsync(Timeout.Infinite,cancellationToken);
+#endif
     }
 
+#if NET6_0_OR_GREATER
+    /// <summary>Performs the asynchronous wait.</summary>
+    /// <param name="asyncWaiter">The asynchronous waiter.</param>
+    /// <param name="millisecondsTimeout">The timeout.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The task to return to the caller.</returns>
+    private Task<bool> WaitUntilCountOrTimeoutAsync(Task<bool> asyncWaiter, int millisecondsTimeout, CancellationToken cancellationToken)
+    {
+        if (millisecondsTimeout == Timeout.Infinite)
+        {
+            return (asyncWaiter.WaitAsync(cancellationToken));
+        }
+        else
+        {
+            return (asyncWaiter.WaitAsync(TimeSpan.FromMilliseconds(millisecondsTimeout), cancellationToken));
+        }
+    }
+#endif
+
     /// <summary>
     /// 进入锁
     /// </summary>
     public Task<bool> WaitAsync(int millisecondsTimeout, CancellationToken cancellationToken = default)
     {
-        return _waiterLock.WaitAsync(millisecondsTimeout, cancellationToken);
+#if NET6_0_OR_GREATER
+        if (cancellationToken.CanBeCanceled || millisecondsTimeout != Timeout.Infinite)
+            return WaitUntilCountOrTimeoutAsync(_waiterLock.WaitAsync(Timeout.Infinite, CancellationToken.None), millisecondsTimeout, cancellationToken);
+        else
+            return _waiterLock.WaitAsync(Timeout.Infinite, CancellationToken.None);
+
+#else
+        return _waiterLock.WaitAsync(millisecondsTimeout,cancellationToken);
+#endif
     }
 
     bool DisposedValue;

src/Admin/ThingsGateway.NewLife.X/PooledAwait/AwaitableExtensions.cs

@@ -0,0 +1,15 @@
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Provides async/await-related extension methods
+    /// </summary>
+    public static class AwaitableExtensions
+    {
+        /// <summary>Controls whether a yield operation should respect captured context</summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ConfiguredYieldAwaitable ConfigureAwait(this YieldAwaitable _, bool continueOnCapturedContext)
+            => new ConfiguredYieldAwaitable(continueOnCapturedContext);
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/ConfiguredYieldAwaitable.cs

@@ -0,0 +1,125 @@
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>Provides an awaitable context for switching into a target environment.</summary>
+    public readonly struct ConfiguredYieldAwaitable
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is ConfiguredYieldAwaitable other && other._continueOnCapturedContext == _continueOnCapturedContext;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => _continueOnCapturedContext ? 1 : 0;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(ConfiguredYieldAwaitable);
+
+        private readonly bool _continueOnCapturedContext;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal ConfiguredYieldAwaitable(bool continueOnCapturedContext)
+            => _continueOnCapturedContext = continueOnCapturedContext;
+
+        /// <summary>Gets an awaiter for this <see cref="ConfiguredYieldAwaitable"/>.</summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ConfiguredYieldAwaiter GetAwaiter()
+            => new ConfiguredYieldAwaiter(_continueOnCapturedContext);
+
+        /// <summary>Provides an awaitable context for switching into a target environment.</summary>
+        public readonly struct ConfiguredYieldAwaiter : ICriticalNotifyCompletion, INotifyCompletion
+        {
+            /// <summary><see cref="Object.Equals(Object)"/></summary>
+            public override bool Equals(object? obj) => obj is ConfiguredYieldAwaiter other && other._continueOnCapturedContext == _continueOnCapturedContext;
+            /// <summary><see cref="Object.GetHashCode"/></summary>
+            public override int GetHashCode() => _continueOnCapturedContext ? 1 : 0;
+            /// <summary><see cref="Object.ToString"/></summary>
+            public override string ToString() => nameof(ConfiguredYieldAwaiter);
+
+            private readonly bool _continueOnCapturedContext;
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal ConfiguredYieldAwaiter(bool continueOnCapturedContext)
+                => _continueOnCapturedContext = continueOnCapturedContext;
+
+            /// <summary>Gets whether a yield is not required.</summary>
+            public bool IsCompleted
+            {
+                [MethodImpl(MethodImplOptions.AggressiveInlining)]
+                get => false;
+            }
+
+            /// <summary>Ends the await operation.</summary>
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public void GetResult() { }
+
+            /// <summary>Posts the <paramref name="continuation"/> back to the current context.</summary>
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public void OnCompleted(Action continuation)
+            {
+                if (_continueOnCapturedContext) YieldFlowContext(continuation, true);
+                else YieldNoContext(continuation, true);
+            }
+
+            /// <summary>Posts the <paramref name="continuation"/> back to the current context.</summary>
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public void UnsafeOnCompleted(Action continuation)
+            {
+                if (_continueOnCapturedContext) YieldFlowContext(continuation, false);
+                else YieldNoContext(continuation, false);
+            }
+
+            private static readonly WaitCallback s_waitCallbackRunAction = state => ((Action?)state)?.Invoke();
+
+#if PLAT_THREADPOOLWORKITEM
+            private sealed class ContinuationWorkItem : IThreadPoolWorkItem
+            {
+                private Action? _continuation;
+
+                [MethodImpl(MethodImplOptions.AggressiveInlining)]
+                private ContinuationWorkItem() => Internal.Counters.ItemBoxAllocated.Increment();
+
+                [MethodImpl(MethodImplOptions.AggressiveInlining)]
+                public static ContinuationWorkItem Create(Action continuation)
+                {
+                    var box = Pool<ContinuationWorkItem>.TryGet() ?? new ContinuationWorkItem();
+                    box._continuation = continuation;
+                    return box;
+                }
+
+                [MethodImpl(MethodImplOptions.AggressiveInlining)]
+                void IThreadPoolWorkItem.Execute()
+                {
+                    var callback = _continuation;
+                    _continuation = null;
+                    Pool<ContinuationWorkItem>.TryPut(this);
+                    callback?.Invoke();
+                }
+            }
+#endif
+            [MethodImpl(MethodImplOptions.NoInlining)] // no-one ever calls ConfigureAwait(true)!
+            private static void YieldFlowContext(Action continuation, bool flowContext)
+            {
+                var awaiter = default(YieldAwaitable.YieldAwaiter);
+                if (flowContext) awaiter.OnCompleted(continuation);
+                else awaiter.UnsafeOnCompleted(continuation);
+            }
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            private static void YieldNoContext(Action continuation, bool flowContext)
+            {
+                if (flowContext)
+                {
+                    ThreadPool.QueueUserWorkItem(s_waitCallbackRunAction, continuation);
+                }
+                else
+                {
+#if PLAT_THREADPOOLWORKITEM
+                    ThreadPool.UnsafeQueueUserWorkItem(ContinuationWorkItem.Create(continuation), false);
+#elif NETSTANDARD1_3
+                    ThreadPool.QueueUserWorkItem(s_waitCallbackRunAction, continuation);
+#else
+                    ThreadPool.UnsafeQueueUserWorkItem(s_waitCallbackRunAction, continuation);
+#endif
+                }
+            }
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/FireAndForget.cs

@@ -0,0 +1,62 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Represents an operation that completes at the first incomplete await,
+    /// with the remainder continuing in the background
+    /// </summary>
+    [AsyncMethodBuilder(typeof(MethodBuilders.FireAndForgetMethodBuilder))]
+    public readonly struct FireAndForget
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(FireAndForget);
+
+        /// <summary>
+        /// Raised when exceptions occur on fire-and-forget methods
+        /// </summary>
+        public static event Action<Exception>? Exception;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static void OnException(Exception exception)
+        {
+            if (exception != null) Exception?.Invoke(exception);
+        }
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ValueTask AsValueTask() => default;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Task AsTask() => TaskUtils.CompletedTask;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static implicit operator Task(FireAndForget _) => TaskUtils.CompletedTask;
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static implicit operator ValueTask(FireAndForget _) => default;
+
+        /// <summary>
+        /// Gets the awaiter for the instance
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ValueTaskAwaiter GetAwaiter() => default(ValueTask).GetAwaiter();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/IResettable.cs

@@ -0,0 +1,13 @@
+namespace PooledAwait
+{
+    /// <summary>
+    /// Indicates that an object can be reset
+    /// </summary>
+    public interface IResettable
+    {
+        /// <summary>
+        /// Resets this instance
+        /// </summary>
+        public void Reset();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/BrowsableAttribute.cs

@@ -0,0 +1,12 @@
+#if NETSTANDARD1_3
+using System;
+
+namespace PooledAwait.Internal
+{
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Class | AttributeTargets.Struct, AllowMultiple = false, Inherited = true)]
+    internal sealed class BrowsableAttribute : Attribute
+    {
+        public BrowsableAttribute(bool _) { }
+    }
+}
+#endif

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/Counters.cs

@@ -0,0 +1,68 @@
+using System.Diagnostics;
+
+namespace PooledAwait.Internal
+{
+    internal static class Counters
+    {
+        internal struct Counter
+        {
+            private long _value;
+            [Conditional("DEBUG")]
+            public void Increment() => Interlocked.Increment(ref _value);
+#if !DEBUG
+            [System.Obsolete("Release only", false)]
+#endif
+            public long Value => Interlocked.Read(ref _value);
+#pragma warning disable CS0618
+            public override string ToString() => Value.ToString();
+#pragma warning restore CS0618
+            public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+            public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+            public void Reset() => Interlocked.Exchange(ref _value, 0);
+        }
+
+        internal static Counter
+            SetStateMachine,
+            PooledStateAllocated,
+            PooledStateRecycled,
+            StateMachineBoxAllocated,
+            StateMachineBoxRecycled,
+            ItemBoxAllocated,
+            TaskAllocated,
+            LazyStateAllocated;
+
+#if !DEBUG
+        [System.Obsolete("Release only", false)]
+#endif
+        public static long TotalAllocations =>
+            PooledStateAllocated.Value + StateMachineBoxAllocated.Value
+            + ItemBoxAllocated.Value + TaskAllocated.Value
+            + SetStateMachine.Value // SetStateMachine usually means a boxed value
+            + LazyStateAllocated.Value;
+
+        internal static void Reset()
+        {
+            SetStateMachine.Reset();
+            PooledStateAllocated.Reset();
+            PooledStateRecycled.Reset();
+            StateMachineBoxAllocated.Reset();
+            StateMachineBoxRecycled.Reset();
+            ItemBoxAllocated.Reset();
+            TaskAllocated.Reset();
+            LazyStateAllocated.Reset();
+        }
+
+#if !DEBUG
+        [System.Obsolete("Release only", false)]
+#endif
+        internal static string Summary()
+            => $@"SetStateMachine: {SetStateMachine.Value}
+PooledStateAllocated: {PooledStateAllocated.Value}
+PooledStateRecycled: {PooledStateRecycled.Value}
+StateMachineBoxAllocated: {StateMachineBoxAllocated.Value}
+StateMachineBoxRecycled: {StateMachineBoxRecycled.Value}
+ItemBoxAllocated: {ItemBoxAllocated.Value}
+TaskAllocated: {TaskAllocated.Value}
+LazyStateAllocated: {LazyStateAllocated.Value}";
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/LazyTaskStateT.cs

@@ -0,0 +1,173 @@
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait.Internal
+{
+    internal sealed class LazyTaskState<T>
+    {
+        private short _version;
+        private T _result;
+        private Exception? _exception;
+        private Task? _task;
+        private bool _isComplete;
+        private ValueTaskCompletionSource<T> _source;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void CheckTokenInsideLock(short token)
+        {
+            if (token != _version) ThrowHelper.ThrowInvalidOperationException();
+        }
+        private object _syncRoot = new object();
+        public Task GetTask(short token)
+        {
+            lock (_syncRoot)
+            {
+                CheckTokenInsideLock(token);
+                if (_task != null) { }
+                else if (_exception is OperationCanceledException) _task = TaskUtils.TaskFactory<T>.Canceled;
+                else if (_exception != null) _task = TaskUtils.FromException<T>(_exception);
+                else if (_isComplete) _task = typeof(T) == typeof(Nothing) ? TaskUtils.CompletedTask : TaskUtils.TaskFactory<T>.FromResult(_result);
+                else
+                {
+                    _source = ValueTaskCompletionSource<T>.Create();
+                    _task = _source.Task;
+                }
+                return _task;
+            }
+        }
+
+        internal bool IsValid(short token) => Volatile.Read(ref _version) == token;
+        internal bool HasSource
+        {
+            get
+            {
+                lock (_syncRoot) { return !_source.IsNull; }
+            }
+        }
+        internal bool HasTask => Volatile.Read(ref _task) != null;
+
+        public bool TrySetResult(short token, T result)
+        {
+            lock (_syncRoot)
+            {
+                if (_isComplete) return false;
+                if (token != _version) return false;
+                _isComplete = true;
+                if (!_source.IsNull) return _source.TrySetResult(result);
+                _result = result;
+                return true;
+            }
+        }
+
+        public bool TrySetException(short token, Exception exception)
+        {
+            lock (_syncRoot)
+            {
+                if (_isComplete) return false;
+                if (token != _version) return false;
+                _isComplete = true;
+                if (!_source.IsNull) return _source.TrySetException(exception);
+                _exception = exception;
+                return true;
+            }
+        }
+
+        public bool TrySetCanceled(short token, CancellationToken cancellationToken = default)
+        {
+            lock (_syncRoot)
+            {
+                if (_isComplete) return false;
+                if (token != _version) return false;
+                _isComplete = true;
+                if (!_source.IsNull) return _source.TrySetCanceled(cancellationToken);
+                _task = TaskUtils.TaskFactory<T>.Canceled;
+                return true;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskState<T> Create() => Pool<LazyTaskState<T>>.TryGet() ?? new LazyTaskState<T>();
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private LazyTaskState()
+        {
+            Counters.LazyStateAllocated.Increment();
+            _result = default!;
+            _version = InitialVersion;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskState<T> CreateConstant(T value)
+        {
+            var obj = new LazyTaskState<T>
+            {
+                _version = Constant
+            };
+            obj.TrySetResult(Constant, value);
+            return obj;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskState<T> CreateCanceled()
+        {
+            var obj = new LazyTaskState<T>
+            {
+                _version = Constant
+            };
+            obj.TrySetCanceled(Constant);
+            return obj;
+        }
+
+        const short InitialVersion = 0, Constant = InitialVersion - 1;
+
+        internal short Version
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _version;
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal void Recycle(short token)
+        {
+            if (token == Constant) return; // never recycle constant values; this is by design
+
+            if (Volatile.Read(ref _version) != token) return; // wrong version; all bets are off!
+
+            if (!Volatile.Read(ref _isComplete)) // if incomplete, try to cancel
+            {
+                if (!TrySetCanceled(token)) return; // if that didn't work... give up - don't recycle
+            }
+
+            bool haveLock = false;
+            try
+            {
+                // only if uncontested; we're not waiting in a dispose
+                Monitor.TryEnter(_syncRoot, ref haveLock);
+                if (haveLock)
+                {
+                    if (token == _version)
+                    {
+                        _result = default!;
+                        _exception = default;
+                        _task = default;
+                        _isComplete = false;
+                        _source = default;
+
+                        switch (++_version)
+                        {
+                            case InitialVersion: // don't wrap all the way around when recycling; could lead to conflicts
+                            case Constant: // don't allow things to *become* constants
+                                break;
+                            default:
+                                Pool<LazyTaskState<T>>.TryPut(this);
+                                break;
+                        }
+                    }
+                }
+            }
+            finally
+            {
+                if (haveLock) Monitor.Exit(this);
+            }
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/ManualResetValueTaskSourceCore.cs

@@ -0,0 +1,313 @@
+#if !PLAT_MRVTSC
+using System;
+using System.Diagnostics;
+using System.Runtime.ExceptionServices;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Threading.Tasks.Sources;
+
+// from: https://raw.githubusercontent.com/dotnet/coreclr/master/src/System.Private.CoreLib/shared/System/Threading/Tasks/Sources/ManualResetValueTaskSourceCore.cs
+// original license:
+
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace PooledAwait.Internal
+{
+    internal readonly struct WaitCallbackShim
+    {
+        public readonly Action<object?>? Continuation;
+        public readonly object? State;
+        private WaitCallbackShim(Action<object?>? continuation, object? state)
+        {
+            Continuation = continuation;
+            State = state;
+        }
+        public static object Create(Action<object?>? continuation, object? state)
+            => Pool.Box(new WaitCallbackShim(continuation, state));
+
+        private void InvokeContinuation() => Continuation?.Invoke(State);
+
+        public static readonly WaitCallback Invoke = state => Pool.UnboxAndReturn<WaitCallbackShim>(state).InvokeContinuation();
+    }
+
+    /// <summary>Provides the core logic for implementing a manual-reset <see cref="IValueTaskSource"/> or <see cref="IValueTaskSource{TResult}"/>.</summary>
+    /// <typeparam name="TResult"></typeparam>
+    [StructLayout(LayoutKind.Auto)]
+    public struct ManualResetValueTaskSourceCore<TResult>
+    {
+        /// <summary>
+        /// The callback to invoke when the operation completes if <see cref="OnCompleted"/> was called before the operation completed,
+        /// or <see cref="ManualResetValueTaskSourceCoreShared.s_sentinel"/> if the operation completed before a callback was supplied,
+        /// or null if a callback hasn't yet been provided and the operation hasn't yet completed.
+        /// </summary>
+        private Action<object?>? _continuation;
+        /// <summary>State to pass to <see cref="_continuation"/>.</summary>
+        private object? _continuationState;
+        /// <summary><see cref="ExecutionContext"/> to flow to the callback, or null if no flowing is required.</summary>
+        private ExecutionContext? _executionContext;
+        /// <summary>
+        /// A "captured" <see cref="SynchronizationContext"/> or <see cref="TaskScheduler"/> with which to invoke the callback,
+        /// or null if no special context is required.
+        /// </summary>
+        private object? _capturedContext;
+        /// <summary>Whether the current operation has completed.</summary>
+        private bool _completed;
+        /// <summary>The result with which the operation succeeded, or the default value if it hasn't yet completed or failed.</summary>
+        /* [AllowNull, MaybeNull] */ private TResult _result;
+        /// <summary>The exception with which the operation failed, or null if it hasn't yet completed or completed successfully.</summary>
+        private ExceptionDispatchInfo? _error;
+        /// <summary>The current version of this value, used to help prevent misuse.</summary>
+        private short _version;
+
+        /// <summary>Gets or sets whether to force continuations to run asynchronously.</summary>
+        /// <remarks>Continuations may run asynchronously if this is false, but they'll never run synchronously if this is true.</remarks>
+        public bool RunContinuationsAsynchronously { get; set; }
+
+        /// <summary>Resets to prepare for the next operation.</summary>
+        public void Reset()
+        {
+            // Reset/update state for the next use/await of this instance.
+            _version++;
+            _completed = false;
+            _result = default!; // TODO-NULLABLE: Remove ! when nullable attributes are respected
+            _error = null;
+            _executionContext = null;
+            _capturedContext = null;
+            _continuation = null;
+            _continuationState = null;
+        }
+
+        /// <summary>Completes with a successful result.</summary>
+        /// <param name="result">The result.</param>
+        public void SetResult(TResult result)
+        {
+            _result = result;
+            SignalCompletion();
+        }
+
+        /// <summary>Complets with an error.</summary>
+        /// <param name="error"></param>
+        public void SetException(Exception error)
+        {
+            _error = ExceptionDispatchInfo.Capture(error);
+            SignalCompletion();
+        }
+
+        /// <summary>Gets the operation version.</summary>
+        public short Version => _version;
+
+        /// <summary>Gets the status of the operation.</summary>
+        /// <param name="token">Opaque value that was provided to the <see cref="ValueTask"/>'s constructor.</param>
+        public ValueTaskSourceStatus GetStatus(short token)
+        {
+            ValidateToken(token);
+            return
+                _continuation == null || !_completed ? ValueTaskSourceStatus.Pending :
+                _error == null ? ValueTaskSourceStatus.Succeeded :
+                _error.SourceException is OperationCanceledException ? ValueTaskSourceStatus.Canceled :
+                ValueTaskSourceStatus.Faulted;
+        }
+
+        /// <summary>Gets the result of the operation.</summary>
+        /// <param name="token">Opaque value that was provided to the <see cref="ValueTask"/>'s constructor.</param>
+        // [StackTraceHidden]
+        public TResult GetResult(short token)
+        {
+            ValidateToken(token);
+            if (!_completed)
+            {
+                ThrowHelper.ThrowInvalidOperationException();
+            }
+
+            _error?.Throw();
+            return _result;
+        }
+
+        /// <summary>Schedules the continuation action for this operation.</summary>
+        /// <param name="continuation">The continuation to invoke when the operation has completed.</param>
+        /// <param name="state">The state object to pass to <paramref name="continuation"/> when it's invoked.</param>
+        /// <param name="token">Opaque value that was provided to the <see cref="ValueTask"/>'s constructor.</param>
+        /// <param name="flags">The flags describing the behavior of the continuation.</param>
+        public void OnCompleted(Action<object?> continuation, object? state, short token, ValueTaskSourceOnCompletedFlags flags)
+        {
+            if (continuation == null) ThrowHelper.ThrowArgumentNullException(nameof(continuation));
+            ValidateToken(token);
+
+            if ((flags & ValueTaskSourceOnCompletedFlags.FlowExecutionContext) != 0)
+            {
+                _executionContext = ExecutionContext.Capture();
+            }
+
+            if ((flags & ValueTaskSourceOnCompletedFlags.UseSchedulingContext) != 0)
+            {
+                SynchronizationContext? sc = SynchronizationContext.Current;
+                if (sc != null && sc.GetType() != typeof(SynchronizationContext))
+                {
+                    _capturedContext = sc;
+                }
+                else
+                {
+                    TaskScheduler ts = TaskScheduler.Current;
+                    if (ts != TaskScheduler.Default)
+                    {
+                        _capturedContext = ts;
+                    }
+                }
+            }
+
+            // We need to set the continuation state before we swap in the delegate, so that
+            // if there's a race between this and SetResult/Exception and SetResult/Exception
+            // sees the _continuation as non-null, it'll be able to invoke it with the state
+            // stored here.  However, this also means that if this is used incorrectly (e.g.
+            // awaited twice concurrently), _continuationState might get erroneously overwritten.
+            // To minimize the chances of that, we check preemptively whether _continuation
+            // is already set to something other than the completion sentinel.
+
+            object? oldContinuation = _continuation;
+            if (oldContinuation == null)
+            {
+                _continuationState = state;
+                oldContinuation = Interlocked.CompareExchange(ref _continuation, continuation, null);
+            }
+
+            if (oldContinuation != null)
+            {
+                // Operation already completed, so we need to queue the supplied callback.
+                if (!ReferenceEquals(oldContinuation, ManualResetValueTaskSourceCoreShared.s_sentinel))
+                {
+                    ThrowHelper.ThrowInvalidOperationException();
+                }
+
+                switch (_capturedContext)
+                {
+                    case null:
+                        if (_executionContext != null)
+                        {
+                            ThreadPool.QueueUserWorkItem(WaitCallbackShim.Invoke, WaitCallbackShim.Create(continuation, state));
+                        }
+                        else
+                        {
+#if NETSTANDARD1_3
+                            ThreadPool.QueueUserWorkItem(
+#else
+                            ThreadPool.UnsafeQueueUserWorkItem(
+#endif
+                                WaitCallbackShim.Invoke, WaitCallbackShim.Create(continuation, state));
+                        }
+                        break;
+
+                    case SynchronizationContext sc:
+                        sc.Post(s =>
+                        {
+                            var tuple = (Tuple<Action<object?>, object?>)s!;
+                            tuple.Item1(tuple.Item2);
+                        }, Tuple.Create(continuation, state));
+                        break;
+
+                    case TaskScheduler ts:
+                        Task.Factory.StartNew(continuation, state, CancellationToken.None, TaskCreationOptions.DenyChildAttach, ts);
+                        break;
+                }
+            }
+        }
+
+        /// <summary>Ensures that the specified token matches the current version.</summary>
+        /// <param name="token">The token supplied by <see cref="ValueTask"/>.</param>
+        private void ValidateToken(short token)
+        {
+            if (token != _version)
+            {
+                ThrowHelper.ThrowInvalidOperationException();
+            }
+        }
+
+        /// <summary>Signals that the operation has completed.  Invoked after the result or error has been set.</summary>
+        private void SignalCompletion()
+        {
+            if (_completed)
+            {
+                ThrowHelper.ThrowInvalidOperationException();
+            }
+            _completed = true;
+
+            if (_continuation != null || Interlocked.CompareExchange(ref _continuation, ManualResetValueTaskSourceCoreShared.s_sentinel, null) != null)
+            {
+                if (_executionContext != null)
+                {
+                    ExecutionContext.Run(
+                        _executionContext,
+                        s_UnboxAndInvokeContextCallback,
+                        Pool.Box<ManualResetValueTaskSourceCore<TResult>>(this));
+                }
+                else
+                {
+                    InvokeContinuation();
+                }
+            }
+        }
+
+        static readonly ContextCallback s_UnboxAndInvokeContextCallback = state => Pool.UnboxAndReturn<ManualResetValueTaskSourceCore<TResult>>(state).InvokeContinuation();
+
+        /// <summary>
+        /// Invokes the continuation with the appropriate captured context / scheduler.
+        /// This assumes that if <see cref="_executionContext"/> is not null we're already
+        /// running within that <see cref="ExecutionContext"/>.
+        /// </summary>
+        private void InvokeContinuation()
+        {
+            Debug.Assert(_continuation != null);
+
+            switch (_capturedContext)
+            {
+                case null:
+                    if (RunContinuationsAsynchronously)
+                    {
+                        if (_executionContext != null)
+                        {
+                            ThreadPool.QueueUserWorkItem(WaitCallbackShim.Invoke, WaitCallbackShim.Create(_continuation, _continuationState));
+                        }
+                        else
+                        {
+#if NETSTANDARD1_3
+                            ThreadPool.QueueUserWorkItem(
+#else
+                            ThreadPool.UnsafeQueueUserWorkItem(
+#endif
+                                WaitCallbackShim.Invoke, WaitCallbackShim.Create(_continuation, _continuationState));
+                        }
+                    }
+                    else
+                    {
+                        _continuation!(_continuationState);
+                    }
+                    break;
+
+                case SynchronizationContext sc:
+                    sc.Post(s =>
+                    {
+                        var state = (Tuple<Action<object?>, object?>)s!;
+                        state.Item1(state.Item2);
+                    }, Tuple.Create(_continuation, _continuationState));
+                    break;
+
+                case TaskScheduler ts:
+                    Task.Factory.StartNew(_continuation, _continuationState, CancellationToken.None, TaskCreationOptions.DenyChildAttach, ts);
+                    break;
+            }
+        }
+    }
+
+    internal static class ManualResetValueTaskSourceCoreShared // separated out of generic to avoid unnecessary duplication
+    {
+        internal static readonly Action<object?> s_sentinel = CompletionSentinel;
+        private static void CompletionSentinel(object? _) // named method to aid debugging
+        {
+            Debug.Fail("The sentinel delegate should never be invoked.");
+            ThrowHelper.ThrowInvalidOperationException();
+        }
+    }
+}
+#endif

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/Nothing.cs

@@ -0,0 +1,9 @@
+namespace PooledAwait.Internal
+{
+    internal readonly struct Nothing // to express ValueTask via PooledState<Nothing>
+    {
+        public override string ToString() => nameof(Nothing);
+        public override int GetHashCode() => 0;
+        public override bool Equals(object? obj) => obj is Nothing;
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/PooledStateT.cs

@@ -0,0 +1,124 @@
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks.Sources;
+
+namespace PooledAwait.Internal
+{
+    internal sealed class PooledState<T> : IValueTaskSource<T>, IValueTaskSource
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledState<T> Create(out short token)
+        {
+            var obj = Pool<PooledState<T>>.TryGet() ?? new PooledState<T>();
+            token = obj._source.Version;
+            return obj;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private PooledState() => Counters.PooledStateAllocated.Increment();
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal bool IsValid(short token) => _source.Version == token;
+
+        private ManualResetValueTaskSourceCore<T> _source; // needs to be mutable
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public T GetResult(short token)
+        {
+            // we only support getting the result once; doing this recycles the source and advances the token
+
+            lock (SyncLock) // we need to be really paranoid about cross-threading over changing the token
+            {
+                var status = _source.GetStatus(token); // do this *outside* the try/finally
+                try // so that we don't increment the counter if someone asks for the wrong value
+                {
+                    switch (status)
+                    {
+                        case ValueTaskSourceStatus.Canceled:
+                            ThrowHelper.ThrowTaskCanceledException();
+                            break;
+                        case ValueTaskSourceStatus.Pending:
+                            Monitor.Wait(SyncLock);
+                            break;
+                    }
+                    return _source.GetResult(token);
+                }
+                finally
+                {
+                    _source.Reset();
+                    if (_source.Version != TaskUtils.InitialTaskSourceVersion)
+                    {
+                        Pool<PooledState<T>>.TryPut(this);
+                        Counters.PooledStateRecycled.Increment();
+                    }
+                }
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        void IValueTaskSource.GetResult(short token) => GetResult(token);
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        private void SignalResult(short token)
+        {
+            lock (SyncLock)
+            {
+                if (token == _source.Version && _source.GetStatus(token) != ValueTaskSourceStatus.Pending)
+                {
+                    Monitor.Pulse(SyncLock);
+                }
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ValueTaskSourceStatus GetStatus(short token) => _source.GetStatus(token);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void OnCompleted(Action<object?> continuation, object? state, short token, ValueTaskSourceOnCompletedFlags flags)
+            => _source.OnCompleted(continuation, state, token, flags);
+
+        private object SyncLock
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => this;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception error, short token)
+        {
+            if (token == _source.Version)
+            {
+
+                switch (_source.GetStatus(token))
+                {
+                    case ValueTaskSourceStatus.Pending:
+                        _source.SetException(error);
+                        // only need to signal if SetException didn't inline a handler
+                        if (token == _source.Version) SignalResult(token);
+                        return true;
+                }
+            }
+            return false;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult(T result, short token)
+        {
+            if (token == _source.Version)
+            {
+                switch (_source.GetStatus(token))
+                {
+                    case ValueTaskSourceStatus.Pending:
+                        _source.SetResult(result);
+                        // only need to signal if SetResult didn't inline a handler
+                        if (token == _source.Version) SignalResult(token);
+                        return true;
+                }
+            }
+            return false;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled(short token)
+            => TrySetException(TaskUtils.SharedTaskCanceledException, token);
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/StateMachineBox.cs

@@ -0,0 +1,113 @@
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait.Internal
+{
+    internal sealed class StateMachineBox<TStateMachine>
+#if PLAT_THREADPOOLWORKITEM
+        : IThreadPoolWorkItem
+#endif
+            where TStateMachine : IAsyncStateMachine
+    {
+        private readonly Action _execute;
+        private TStateMachine _stateMachine;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private StateMachineBox()
+        {
+            _stateMachine = default!;
+            _execute = Execute;
+            Counters.StateMachineBoxAllocated.Increment();
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static StateMachineBox<TStateMachine> Create(ref TStateMachine stateMachine)
+        {
+            var box = Pool<StateMachineBox<TStateMachine>>.TryGet() ?? new StateMachineBox<TStateMachine>();
+            box._stateMachine = stateMachine;
+            return box;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void AwaitOnCompleted<TAwaiter>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+        {
+            var box = Create(ref stateMachine);
+            if (typeof(TAwaiter) == typeof(YieldAwaitable.YieldAwaiter))
+            {
+                Yield(box, true);
+            }
+            else
+            {
+                awaiter.OnCompleted(box._execute);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void AwaitUnsafeOnCompleted<TAwaiter>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+        {
+            var box = Create(ref stateMachine);
+            if (typeof(TAwaiter) == typeof(YieldAwaitable.YieldAwaiter))
+            {
+                Yield(box, false);
+            }
+            else
+            {
+                awaiter.UnsafeOnCompleted(box._execute);
+            }
+        }
+
+        private static void Yield(StateMachineBox<TStateMachine> box, bool flowContext)
+        {
+            // heavily inspired by YieldAwaitable.QueueContinuation
+
+            var syncContext = SynchronizationContext.Current;
+            if (syncContext != null && syncContext.GetType() != typeof(SynchronizationContext))
+            {
+                syncContext.Post(s_SendOrPostCallback, box);
+            }
+            else
+            {
+                var taskScheduler = TaskScheduler.Current;
+                if (!ReferenceEquals(taskScheduler, TaskScheduler.Default))
+                {
+                    Task.Factory.StartNew(box._execute, default, TaskCreationOptions.PreferFairness, taskScheduler);
+                }
+                else if (flowContext)
+                {
+                    ThreadPool.QueueUserWorkItem(s_WaitCallback, box);
+                }
+                else
+                {
+#if PLAT_THREADPOOLWORKITEM
+                    ThreadPool.UnsafeQueueUserWorkItem(box, false);
+#elif NETSTANDARD1_3
+                    ThreadPool.QueueUserWorkItem(s_WaitCallback, box);
+#else
+                    ThreadPool.UnsafeQueueUserWorkItem(s_WaitCallback, box);
+#endif
+                }
+            }
+        }
+
+        static readonly SendOrPostCallback s_SendOrPostCallback = state => ((StateMachineBox<TStateMachine>?)state!)?.Execute();
+        static readonly WaitCallback s_WaitCallback = state => ((StateMachineBox<TStateMachine>?)state)?.Execute();
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Execute()
+        {
+            // extract the state
+            var tmp = _stateMachine;
+
+            // recycle the instance
+            _stateMachine = default!;
+            Pool<StateMachineBox<TStateMachine>>.TryPut(this);
+            Counters.StateMachineBoxRecycled.Increment();
+
+            // progress the state machine
+            tmp.MoveNext();
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/TaskUtils.cs

@@ -0,0 +1,171 @@
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks.Sources;
+
+namespace PooledAwait.Internal
+{
+    // NET45 lacks some useful Task APIs; shim over them
+    internal static class TaskUtils
+    {
+        internal static readonly short InitialTaskSourceVersion = new ManualResetValueTaskSourceCore<Nothing>().Version;
+
+        public static readonly TaskCanceledException SharedTaskCanceledException = new TaskCanceledException();
+#if NET45
+        public static readonly Task CompletedTask = TaskFactory<Nothing>.FromResult(default);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Task<T> FromException<T>(Exception exception)
+        {
+            var source = ValueTaskCompletionSource<T>.Create();
+            source.TrySetException(exception);
+            return source.Task;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Task FromException(Exception exception) => FromException<bool>(exception);
+#else
+        public static readonly Task CompletedTask = Task.CompletedTask;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Task<T> FromException<T>(Exception exception) => Task.FromException<T>(exception);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Task FromException(Exception exception) => Task.FromException(exception);
+#endif
+
+
+        internal static class TaskFactory<TResult>
+        {
+            // draws from AsyncMethodBuilder, but less boxing
+
+            public static readonly Task<TResult> Canceled = CreateCanceled();
+
+            static Task<TResult> CreateCanceled()
+            {
+                var source = ValueTaskCompletionSource<TResult>.Create();
+                source.TrySetCanceled();
+                return source.Task;
+            }
+
+            private static readonly TaskCache<TResult> _cache = (TaskCache<TResult>)CreateCacheForType();
+
+            private static object CreateCacheForType()
+            {
+                if (typeof(TResult) == typeof(Nothing)) return new NothingTaskCache();
+                if (typeof(TResult) == typeof(int)) return new Int32TaskCache();
+                if (typeof(TResult) == typeof(int?)) return new NullableInt32TaskCache();
+                if (typeof(TResult) == typeof(bool)) return new BooleanTaskCache();
+                if (typeof(TResult) == typeof(bool?)) return new NullableBooleanTaskCache();
+
+                Type underlyingType = Nullable.GetUnderlyingType(typeof(TResult)) ?? typeof(TResult);
+                if (underlyingType == typeof(uint)
+                 || underlyingType == typeof(byte)
+                 || underlyingType == typeof(sbyte)
+                 || underlyingType == typeof(char)
+                 || underlyingType == typeof(decimal)
+                 || underlyingType == typeof(long)
+                 || underlyingType == typeof(ulong)
+                 || underlyingType == typeof(short)
+                 || underlyingType == typeof(ushort)
+                 || underlyingType == typeof(float)
+                 || underlyingType == typeof(double)
+                 || underlyingType == typeof(IntPtr)
+                 || underlyingType == typeof(UIntPtr)
+                    ) return new DefaultEquatableTaskCache<TResult>();
+
+                if (typeof(TResult) == typeof(string)) return new StringTaskCache();
+#if !NETSTANDARD1_3
+                if (!typeof(TResult).IsValueType) return new ObjectTaskCache<TResult>();
+#endif
+                return new TaskCache<TResult>();
+            }
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public static Task<TResult> FromResult(TResult result) => _cache.FromResult(result);
+        }
+
+        class TaskCache<TResult>
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal virtual Task<TResult> FromResult(TResult value) => Task.FromResult(value);
+        }
+        class NothingTaskCache : TaskCache<Nothing>
+        {
+            private static readonly Task<Nothing> s_Instance = Task.FromResult<Nothing>(default);
+            internal override Task<Nothing> FromResult(Nothing value) => s_Instance;
+        }
+        class DefaultEquatableTaskCache<TResult> : TaskCache<TResult>
+        {
+            private static readonly Task<TResult> s_Default = Task.FromResult<TResult>(default!);
+            private static readonly EqualityComparer<TResult> _comparer = EqualityComparer<TResult>.Default;
+            internal override Task<TResult> FromResult(TResult value)
+                => _comparer.Equals(value, default!) ? s_Default : base.FromResult(value);
+        }
+        class ObjectTaskCache<TResult> : TaskCache<TResult>
+        {
+            private static readonly Task<TResult> s_Null = Task.FromResult<TResult>(default!);
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<TResult> FromResult(TResult value)
+                => value == null ? s_Null : base.FromResult(value);
+        }
+        sealed class StringTaskCache : ObjectTaskCache<string>
+        {
+            private static readonly Task<string> s_Empty = Task.FromResult<string>("");
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<string> FromResult(string value)
+                => string.IsNullOrEmpty(value) ? s_Empty : base.FromResult(value);
+        }
+        sealed class BooleanTaskCache : TaskCache<bool>
+        {
+            static readonly Task<bool> s_True = Task.FromResult(true), s_False = Task.FromResult(false);
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<bool> FromResult(bool value) => value ? s_True : s_False;
+        }
+        sealed class NullableBooleanTaskCache : TaskCache<bool?>
+        {
+            static readonly Task<bool?> s_True = Task.FromResult((bool?)true), s_False = Task.FromResult((bool?)false),
+                s_Null = Task.FromResult((bool?)null);
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<bool?> FromResult(bool? value) =>
+                value.HasValue ? (value.GetValueOrDefault() ? s_True : s_False) : s_Null;
+        }
+        sealed class Int32TaskCache : TaskCache<int>
+        {
+            const int MIN_INC = -1, MAX_EXC = 11;
+            static readonly Task<int>[] s_Known = CreateKnown();
+            static Task<int>[] CreateKnown()
+            {
+                var arr = new Task<int>[MAX_EXC - MIN_INC];
+                for (int i = 0; i < arr.Length; i++)
+                    arr[i] = Task.FromResult(i + MIN_INC);
+                return arr;
+            }
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<int> FromResult(int value)
+                => value >= MIN_INC && value < MAX_EXC ? s_Known[value - MIN_INC] : base.FromResult(value);
+        }
+        sealed class NullableInt32TaskCache : TaskCache<int?>
+        {
+            const int MIN_INC = -1, MAX_EXC = 11;
+            static readonly Task<int?>[] s_Known = CreateKnown();
+            static readonly Task<int?> s_Null = Task.FromResult((int?)null);
+            static Task<int?>[] CreateKnown()
+            {
+                var arr = new Task<int?>[MAX_EXC - MIN_INC];
+                for (int i = 0; i < arr.Length; i++)
+                    arr[i] = Task.FromResult((int?)(i + MIN_INC));
+                return arr;
+            }
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            internal override Task<int?> FromResult(int? nullable)
+            {
+                if (nullable.HasValue)
+                {
+                    int value = nullable.GetValueOrDefault();
+                    return value >= MIN_INC && value < MAX_EXC ? s_Known[value - MIN_INC] : base.FromResult(nullable);
+                }
+                return s_Null;
+            }
+        }
+
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Internal/ThrowHelper.cs

@@ -0,0 +1,30 @@
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait.Internal
+{
+    internal static class ThrowHelper
+    {
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal static void ThrowInvalidOperationException(string? message = null)
+        {
+            if (string.IsNullOrWhiteSpace(message)) throw new InvalidOperationException();
+            else throw new InvalidOperationException(message);
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal static T ThrowInvalidOperationException<T>(string? message = null)
+        {
+            ThrowInvalidOperationException(message);
+            return default!;
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal static T ThrowNotSupportedException<T>() => throw new NotSupportedException();
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal static void ThrowArgumentNullException(string paramName) => throw new ArgumentNullException(paramName);
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal static void ThrowTaskCanceledException() => throw new TaskCanceledException();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/LazyTaskCompletionSource.cs

@@ -0,0 +1,127 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Like a ValueTaskCompletionSource, but the actual task will only become allocated
+    /// if the .Task is consumed; this is useful for APIs where the consumer *may* consume a task
+    /// </summary>
+    public readonly struct LazyTaskCompletionSource : IDisposable
+    {
+
+        private static LazyTaskCompletionSource _completed, _canceled;
+
+        /// <summary>
+        /// A global LazyTaskCompletionSource that represents a completed operation
+        /// </summary>
+        public static LazyTaskCompletionSource CompletedTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _completed.IsValid ? _completed : _completed = new LazyTaskCompletionSource(LazyTaskState<Nothing>.CreateConstant(default));
+        }
+
+        /// <summary>
+        /// A global LazyTaskCompletionSource that represents a cancelled operation
+        /// </summary>
+        public static LazyTaskCompletionSource CanceledTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _canceled.IsValid ? _canceled : _canceled = new LazyTaskCompletionSource(LazyTaskState<Nothing>.CreateCanceled());
+        }
+
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is LazyTaskCompletionSource ltcs && _state == ltcs._state && _token == ltcs._token;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_state == null ? 0 : _state.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(LazyTaskCompletionSource);
+
+        private readonly LazyTaskState<Nothing> _state;
+        private readonly short _token;
+
+        /// <summary>
+        /// Gets the task associated with this instance
+        /// </summary>
+        public Task Task => _state?.GetTask(_token) ?? ThrowHelper.ThrowInvalidOperationException<Task>();
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private LazyTaskCompletionSource(LazyTaskState<Nothing> state)
+        {
+            _state = state;
+            _token = state.Version;
+        }
+
+        /// <summary>
+        /// Create a new instance; this instance should be disposed when it is known to be unwanted
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskCompletionSource Create()
+            => new LazyTaskCompletionSource(LazyTaskState<Nothing>.Create());
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult() => _state?.TrySetResult(_token, default) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled(CancellationToken cancellationToken = default) => _state?.TrySetCanceled(_token, cancellationToken) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult()
+        {
+            if (!TrySetResult()) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetCanceled(CancellationToken cancellationToken = default)
+        {
+            if (!TrySetCanceled(cancellationToken)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception exception) => _state?.TrySetException(_token, exception) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            if (!TrySetException(exception)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Release all resources associated with this operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Dispose() => _state?.Recycle(_token);
+
+        internal bool IsValid => _state?.IsValid(_token) == true;
+        internal bool HasSource => _state?.HasSource == true;
+        internal bool HasTask => _state?.HasTask == true;
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _state == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/LazyTaskCompletionSourceT.cs

@@ -0,0 +1,126 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Like a ValueTaskCompletionSource<typeparamref name="T"/>, but the actual task will only become allocated
+    /// if the .Task is consumed; this is useful for APIs where the consumer *may* consume a task
+    /// </summary>
+    public readonly struct LazyTaskCompletionSource<T> : IDisposable
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is LazyTaskCompletionSource<T> ltcs && _state == ltcs._state && _token == ltcs._token;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_state == null ? 0 : _state.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(LazyTaskCompletionSource);
+
+        private readonly LazyTaskState<T> _state;
+        private readonly short _token;
+
+        /// <summary>
+        /// Gets the task associated with this instance
+        /// </summary>
+        public Task<T> Task => (Task<T>)(_state?.GetTask(_token) ?? ThrowHelper.ThrowInvalidOperationException<Task<T>>());
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private LazyTaskCompletionSource(LazyTaskState<T> state)
+        {
+            _state = state;
+            _token = state.Version;
+        }
+
+        /// <summary>
+        /// Create a new instance; this instance should be disposed when it is known to be unwanted
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskCompletionSource<T> Create()
+            => new LazyTaskCompletionSource<T>(LazyTaskState<T>.Create());
+
+        /// <summary>
+        /// Create a new instance; this instance will never by recycled
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static LazyTaskCompletionSource<T> CreateConstant(T value)
+            => new LazyTaskCompletionSource<T>(LazyTaskState<T>.CreateConstant(value));
+
+
+        private static LazyTaskCompletionSource<T> _canceled;
+
+        /// <summary>
+        /// A global LazyTaskCompletionSource that represents a cancelled operation
+        /// </summary>
+        public static LazyTaskCompletionSource<T> CanceledTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _canceled.IsValid ? _canceled : _canceled = new LazyTaskCompletionSource<T>(LazyTaskState<T>.CreateCanceled());
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult(T result) => _state?.TrySetResult(_token, result) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult(T result)
+        {
+            if (!TrySetResult(result)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled(CancellationToken cancellationToken = default)
+            => _state?.TrySetCanceled(_token, cancellationToken) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetCanceled(CancellationToken cancellationToken = default)
+        {
+            if (!TrySetCanceled(cancellationToken)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception exception) => _state?.TrySetException(_token, exception) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            if (!TrySetException(exception)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Release all resources associated with this operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Dispose() => _state?.Recycle(_token);
+
+        internal bool IsValid => _state?.IsValid(_token) == true;
+        internal bool HasSource => _state?.HasSource == true;
+        internal bool HasTask => _state?.HasTask == true;
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _state == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/MethodBuilders/FireAndForgetMethodBuilder.cs

@@ -0,0 +1,73 @@
+using PooledAwait.Internal;
+
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+#pragma warning disable CS1591
+
+namespace PooledAwait.MethodBuilders
+{
+    /// <summary>
+    /// This type is not intended for direct usage
+    /// </summary>
+    [Browsable(false)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public struct FireAndForgetMethodBuilder
+    {
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        public override string ToString() => nameof(FireAndForgetMethodBuilder);
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static FireAndForgetMethodBuilder Create() => default;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetStateMachine(IAsyncStateMachine _) => Counters.SetStateMachine.Increment();
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult() { }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception) => FireAndForget.OnException(exception);
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public FireAndForget Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => default;
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+            => StateMachineBox<TStateMachine>.AwaitOnCompleted(ref awaiter, ref stateMachine);
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitUnsafeOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+            => StateMachineBox<TStateMachine>.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine);
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Start<TStateMachine>(ref TStateMachine stateMachine)
+            where TStateMachine : IAsyncStateMachine => stateMachine.MoveNext();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/MethodBuilders/PooledTaskMethodBuilder.cs

@@ -0,0 +1,105 @@
+using PooledAwait.Internal;
+
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+using SystemTask = System.Threading.Tasks.Task;
+
+#pragma warning disable CS1591
+
+namespace PooledAwait.MethodBuilders
+{
+    /// <summary>
+    /// This type is not intended for direct usage
+    /// </summary>
+    [Browsable(false)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public struct PooledTaskMethodBuilder
+    {
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        public override string ToString() => nameof(PooledTaskMethodBuilder);
+
+        private ValueTaskCompletionSource<Nothing> _source;
+        private Exception _exception;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledTaskMethodBuilder Create() => default;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetStateMachine(IAsyncStateMachine _) => Counters.SetStateMachine.Increment();
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult()
+        {
+            _source.TrySetResult(default);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            _source.TrySetException(exception);
+            _exception = exception;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void EnsureHasTask()
+        {
+            if (_source.IsNull) _source = ValueTaskCompletionSource<Nothing>.Create();
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public PooledTask Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                SystemTask task;
+                if (!_source.IsNull) task = _source.Task;
+                else if (_exception is OperationCanceledException) task = TaskUtils.TaskFactory<Nothing>.Canceled;
+                else if (_exception != null) task = TaskUtils.FromException(_exception);
+                else task = TaskUtils.CompletedTask;
+                return new PooledTask(task);
+            }
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitUnsafeOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Start<TStateMachine>(ref TStateMachine stateMachine)
+            where TStateMachine : IAsyncStateMachine => stateMachine.MoveNext();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/MethodBuilders/PooledTaskMethodBuilderT.cs

@@ -0,0 +1,105 @@
+using PooledAwait.Internal;
+
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+#pragma warning disable CS1591
+
+namespace PooledAwait.MethodBuilders
+{
+    /// <summary>
+    /// This type is not intended for direct usage
+    /// </summary>
+    [Browsable(false)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public struct PooledTaskMethodBuilder<T>
+    {
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        public override string ToString() => nameof(PooledTaskMethodBuilder);
+
+        private ValueTaskCompletionSource<T> _source;
+        private Exception _exception;
+        private T _result;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledTaskMethodBuilder<T> Create() => default;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetStateMachine(IAsyncStateMachine _) => Counters.SetStateMachine.Increment();
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult(T result)
+        {
+            _source.TrySetResult(result);
+            _result = result;
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            _source.TrySetException(exception);
+            _exception = exception;
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public PooledTask<T> Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                Task<T> task;
+                if (!_source.IsNull) task = _source.Task;
+                else if (_exception is OperationCanceledException) task = TaskUtils.TaskFactory<T>.Canceled;
+                else if (_exception != null) task = TaskUtils.FromException<T>(_exception);
+                else task = TaskUtils.TaskFactory<T>.FromResult(_result);
+                return new PooledTask<T>(task);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void EnsureHasTask()
+        {
+            if (_source.IsNull) _source = ValueTaskCompletionSource<T>.Create();
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitUnsafeOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Start<TStateMachine>(ref TStateMachine stateMachine)
+            where TStateMachine : IAsyncStateMachine => stateMachine.MoveNext();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/MethodBuilders/PooledValueTaskMethodBuilder.cs

@@ -0,0 +1,94 @@
+using PooledAwait.Internal;
+
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+#pragma warning disable CS1591
+
+namespace PooledAwait.MethodBuilders
+{
+    /// <summary>
+    /// This type is not intended for direct usage
+    /// </summary>
+    [Browsable(false)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public struct PooledValueTaskMethodBuilder
+    {
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        public override string ToString() => nameof(PooledValueTaskMethodBuilder);
+
+        private PooledValueTaskSource _source;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledValueTaskMethodBuilder Create() => default;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetStateMachine(IAsyncStateMachine _) => Counters.SetStateMachine.Increment();
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult()
+        {
+            _source.TrySetResult();
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            EnsureHasTask();
+            _source.TrySetException(exception);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void EnsureHasTask()
+        {
+            if (!_source.HasTask) _source = PooledValueTaskSource.Create();
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public PooledValueTask Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source.PooledTask;
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitUnsafeOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Start<TStateMachine>(ref TStateMachine stateMachine)
+            where TStateMachine : IAsyncStateMachine => stateMachine.MoveNext();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/MethodBuilders/PooledValueTaskMethodBuilderT.cs

@@ -0,0 +1,95 @@
+using PooledAwait.Internal;
+
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+#pragma warning disable CS1591
+
+namespace PooledAwait.MethodBuilders
+{
+    /// <summary>
+    /// This type is not intended for direct usage
+    /// </summary>
+    [Browsable(false)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public struct PooledValueTaskMethodBuilder<T>
+    {
+        public override bool Equals(object? obj) => ThrowHelper.ThrowNotSupportedException<bool>();
+        public override int GetHashCode() => ThrowHelper.ThrowNotSupportedException<int>();
+        public override string ToString() => nameof(PooledValueTaskMethodBuilder);
+
+        private PooledValueTaskSource<T> _source;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledValueTaskMethodBuilder<T> Create() => default;
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetStateMachine(IAsyncStateMachine _) => Counters.SetStateMachine.Increment();
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult(T result)
+        {
+            if (_source.HasTask) _source.TrySetResult(result);
+            else _source = new PooledValueTaskSource<T>(result);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            EnsureHasTask();
+            _source.TrySetException(exception);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void EnsureHasTask()
+        {
+            if (!_source.HasTask) _source = PooledValueTaskSource<T>.Create();
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public PooledValueTask<T> Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source.PooledTask;
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : INotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AwaitUnsafeOnCompleted<TAwaiter, TStateMachine>(
+            ref TAwaiter awaiter, ref TStateMachine stateMachine)
+            where TAwaiter : ICriticalNotifyCompletion
+            where TStateMachine : IAsyncStateMachine
+        {
+            EnsureHasTask();
+            StateMachineBox<TStateMachine>.AwaitUnsafeOnCompleted(ref awaiter, ref stateMachine);
+        }
+
+        [Browsable(false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Start<TStateMachine>(ref TStateMachine stateMachine)
+            where TStateMachine : IAsyncStateMachine => stateMachine.MoveNext();
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Pool.cs

@@ -0,0 +1,73 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Utility methods for boxing value types efficiently, in particular for
+    /// avoid boxes and capture contexts in callbacks
+    /// </summary>
+    public static class Pool
+    {
+        /// <summary>
+        /// Gets an instance from the pool if possible
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static T? TryRent<T>() where T : class
+            => Pool<T>.TryGet();
+
+        /// <summary>
+        /// Puts an instance back into the pool
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void Return<T>(T value) where T : class
+        {
+            if (value is IResettable reset) reset.Reset();
+            Pool<T>.TryPut(value);
+        }
+
+        /// <summary>
+        /// Wraps a value-type into a boxed instance, using an object pool;
+        /// consider using value-tuples in particular
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static object Box<T>(in T value) where T : struct
+            => ItemBox<T>.Create(in value);
+
+        /// <summary>
+        /// Unwraps a value-type from a boxed instance and recycles
+        /// the instance, which should not be touched again
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static T UnboxAndReturn<T>(object obj) where T : struct
+            => ItemBox<T>.UnboxAndRecycle(obj);
+
+        internal sealed class ItemBox<T> where T : struct
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            private ItemBox() => Counters.ItemBoxAllocated.Increment();
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public static ItemBox<T> Create(in T value)
+            {
+                var box = Pool<ItemBox<T>>.TryGet() ?? new ItemBox<T>();
+                box._value = value;
+                return box;
+            }
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public static T UnboxAndRecycle(object obj)
+            {
+                var box = (ItemBox<T>)obj;
+                var value = box._value;
+                box._value = default;
+                Pool<ItemBox<T>>.TryPut(box);
+                return value;
+            }
+#pragma warning disable IDE0044 // make field readonly? no, IDE, you're wrong
+            private T _value;
+#pragma warning restore IDE0044
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PoolSizeAttribute.cs

@@ -0,0 +1,21 @@
+#if !NETSTANDARD1_3
+namespace PooledAwait
+{
+    /// <summary>
+    /// Controls the number of elements to store in the pool
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, AllowMultiple = false, Inherited = true)]
+    public sealed class PoolSizeAttribute : Attribute
+    {
+        /// <summary>
+        /// The number of elements to store in the pool
+        /// </summary>
+        public int Size { get; }
+
+        /// <summary>
+        /// Create a new PoolSizeAttribute instance
+        /// </summary>
+        public PoolSizeAttribute(int size) => Size = size;
+    }
+}
+#endif

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PoolT.cs

@@ -0,0 +1,47 @@
+using System.Runtime.CompilerServices;
+
+using ThingsGateway.NewLife.Collections;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A general-purpose pool of object references; it is the caller's responsibility
+    /// to ensure that overlapped usage does not occur
+    /// </summary>
+    internal static class Pool<T> where T : class
+    {
+        private static ObjectPoolLock<T> pool = new();
+
+        [ThreadStatic]
+        private static T? ts_local;
+
+        /// <summary>
+        /// Gets an instance from the pool if possible
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static T? TryGet()
+        {
+            var tmp = ts_local;
+            ts_local = null;
+            return tmp ?? pool.Get();
+        }
+
+        /// <summary>
+        /// Puts an instance back into the pool
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void TryPut(T value)
+        {
+            if (value != null)
+            {
+                if (ts_local == null)
+                {
+                    ts_local = value;
+                    return;
+                }
+                pool.Return(value);
+            }
+        }
+    }
+
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledAwait.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<Import Project="..\..\Foundation.props" />
+
+	<PropertyGroup>
+		<IncludeAsyncInterfaces>false</IncludeAsyncInterfaces>
+	</PropertyGroup>
+
+	<PropertyGroup Condition="$(TargetFramework)=='net6.0'">
+		<DefineConstants>$(DefineConstants);PLAT_THREADPOOLWORKITEM;PLAT_MRVTSC</DefineConstants>
+	</PropertyGroup>
+	<PropertyGroup Condition="$(TargetFramework)=='net8.0'">
+		<DefineConstants>$(DefineConstants);PLAT_THREADPOOLWORKITEM;PLAT_MRVTSC</DefineConstants>
+	</PropertyGroup>
+
+	<PropertyGroup Condition="$(TargetFramework)=='netstandard2.0'">
+		<DefineConstants>$(DefineConstants);PLAT_MRVTSC</DefineConstants>
+		<IncludeAsyncInterfaces>true</IncludeAsyncInterfaces>
+	</PropertyGroup>
+
+	<PropertyGroup Condition="$(TargetFramework)=='net462'">
+		<DefineConstants>$(DefineConstants);PLAT_MRVTSC</DefineConstants>
+		<IncludeAsyncInterfaces>true</IncludeAsyncInterfaces>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.1.0" Condition="$(IncludeAsyncInterfaces)=='true'" />
+	</ItemGroup>
+
+</Project>

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledTask.cs

@@ -0,0 +1,60 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A Task, but with a custom builder
+    /// </summary>
+    [AsyncMethodBuilder(typeof(MethodBuilders.PooledTaskMethodBuilder))]
+    public readonly struct PooledTask
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledTask pt && _task == pt._task;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => _task == null ? 0 : _task.GetHashCode();
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledTask);
+
+        private readonly Task _task;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledTask(Task task) => _task = task;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Task AsTask() => _task ?? TaskUtils.CompletedTask;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+
+        public static implicit operator Task(in PooledTask task) => task.AsTask();
+
+        /// <summary>
+        /// Gets the awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public TaskAwaiter GetAwaiter() => AsTask().GetAwaiter();
+
+        /// <summary>
+        /// Gets the configured awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ConfiguredTaskAwaitable ConfigureAwait(bool continueOnCapturedContext)
+            => AsTask().ConfigureAwait(continueOnCapturedContext);
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _task == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledTaskT.cs

@@ -0,0 +1,60 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A Task<typeparamref name="T"/>, but with a custom builder
+    /// </summary>
+    [AsyncMethodBuilder(typeof(MethodBuilders.PooledTaskMethodBuilder<>))]
+    public readonly struct PooledTask<T>
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledTask<T> pt && _task == pt._task;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => _task == null ? 0 : _task.GetHashCode();
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledTask);
+
+        private readonly Task<T>? _task;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledTask(Task<T> task) => _task = task;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Task<T> AsTask() => _task ?? ThrowHelper.ThrowInvalidOperationException<Task<T>>();
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+
+        public static implicit operator Task<T>(in PooledTask<T> task) => task.AsTask();
+
+        /// <summary>
+        /// Gets the awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public TaskAwaiter<T> GetAwaiter() => AsTask().GetAwaiter();
+
+        /// <summary>
+        /// Gets the configured awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ConfiguredTaskAwaitable<T> ConfigureAwait(bool continueOnCapturedContext)
+            => AsTask().ConfigureAwait(continueOnCapturedContext);
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _task == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledValueTask.cs

@@ -0,0 +1,71 @@
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks.Sources;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A ValueTask with a custom source and builder
+    /// </summary>
+    [AsyncMethodBuilder(typeof(MethodBuilders.PooledValueTaskMethodBuilder))]
+    public readonly struct PooledValueTask
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledValueTask pvt && _source == pvt._source && _token == pvt._token;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_source == null ? 0 : _source.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledValueTask);
+
+        private readonly IValueTaskSource _source;
+        private readonly short _token;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledValueTask(IValueTaskSource source, short token)
+        {
+            _source = source;
+            _token = token;
+        }
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ValueTask AsValueTask() => _source == null ? default : new ValueTask(_source, _token);
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static implicit operator ValueTask(in PooledValueTask task) => task.AsValueTask();
+
+        /// <summary>
+        /// Gets the awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#pragma warning disable CA2012 // 正确使用 ValueTask
+        public ValueTaskAwaiter GetAwaiter() => AsValueTask().GetAwaiter();
+#pragma warning restore CA2012 // 正确使用 ValueTask
+
+        /// <summary>
+        /// Gets the configured awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ConfiguredValueTaskAwaitable ConfigureAwait(bool continueOnCapturedContext)
+            => AsValueTask().ConfigureAwait(continueOnCapturedContext);
+
+        /// <summary>
+        /// Rents a task-source that will be recycled when the task is awaited
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static PooledValueTaskSource CreateSource() => PooledValueTaskSource.Create();
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledValueTaskSource.cs

@@ -0,0 +1,126 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A task-source that automatically recycles when the task is awaited
+    /// </summary>
+    public readonly struct PooledValueTaskSource
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledValueTaskSource pvt && _source == pvt._source && _token == pvt._token;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_source == null ? 0 : _source.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledValueTaskSource);
+
+        /// <summary>
+        /// Gets the task that corresponds to this instance; it can only be awaited once
+        /// </summary>
+        public ValueTask Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null ? default : new ValueTask(_source, _token);
+        }
+
+        /// <summary>
+        /// Indicates whether this instance is well-defined against a value task instance
+        /// </summary>
+        public bool HasTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source != null;
+        }
+
+        internal PooledValueTask PooledTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => new PooledValueTask(_source, _token);
+        }
+
+        /// <summary>
+        /// Rents a task-source that will be recycled when the task is awaited
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledValueTaskSource Create()
+        {
+            var source = PooledState<Nothing>.Create(out var token);
+            return new PooledValueTaskSource(source, token);
+        }
+
+        private readonly PooledState<Nothing> _source;
+        private readonly short _token;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledValueTaskSource(PooledState<Nothing> source, short token)
+        {
+            _source = source;
+            _token = token;
+        }
+
+        /// <summary>
+        /// Test whether the source is valid
+        /// </summary>
+        public bool IsValid
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source?.IsValid(_token) == true;
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult() => _source?.TrySetResult(default, _token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult()
+        {
+            if (!TrySetResult()) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception error) => _source?.TrySetException(error, _token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            if (!TrySetException(exception)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled() => _source?.TrySetCanceled(_token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetCanceled()
+        {
+            if (!TrySetCanceled()) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledValueTaskSourceT.cs

@@ -0,0 +1,141 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A task-source that automatically recycles when the task is awaited
+    /// </summary>
+    public readonly struct PooledValueTaskSource<T>
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledValueTaskSource<T> pvt && _token == pvt._token &&
+            (_source != null ? _source == pvt._source : (pvt._source == null && EqualityComparer<T>.Default.Equals(_value, pvt._value)));
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_source == null ? EqualityComparer<T>.Default.GetHashCode(_value!) : _source.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledValueTaskSource);
+
+        /// <summary>
+        /// Gets the task that corresponds to this instance; it can only be awaited once
+        /// </summary>
+        public ValueTask<T> Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null ? new ValueTask<T>(_value) : new ValueTask<T>(_source, _token);
+        }
+
+        /// <summary>
+        /// Indicates whether this instance is well-defined against a value task instance
+        /// </summary>
+        public bool HasTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source != null;
+        }
+
+        internal PooledValueTask<T> PooledTask
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null ? new PooledValueTask<T>(_value) : new PooledValueTask<T>(_source, _token);
+        }
+
+        /// <summary>
+        /// Rents a task-source that will be recycled when the task is awaited
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static PooledValueTaskSource<T> Create()
+        {
+            var source = PooledState<T>.Create(out var token);
+            return new PooledValueTaskSource<T>(source, token);
+        }
+
+        private readonly PooledState<T>? _source;
+        private readonly short _token;
+
+        private readonly T _value;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledValueTaskSource(PooledState<T> source, short token)
+        {
+            _source = source;
+            _token = token;
+            _value = default!;
+        }
+
+        /// <summary>
+        /// Create a new PooledValueTaskSource that will yield a constant value without ever renting/recycling any background state
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public PooledValueTaskSource(T value)
+        {
+            _source = null;
+            _token = default;
+            _value = value!;
+        }
+
+        /// <summary>
+        /// Test whether the source is valid
+        /// </summary>
+        public bool IsValid
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source?.IsValid(_token) == true;
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult(T result) => _source?.TrySetResult(result, _token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult(T result)
+        {
+            if (!TrySetResult(result)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception error) => _source?.TrySetException(error, _token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            if (!TrySetException(exception)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled() => _source?.TrySetCanceled(_token) == true;
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetCanceled()
+        {
+            if (!TrySetCanceled()) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/PooledValueTaskT.cs

@@ -0,0 +1,85 @@
+using PooledAwait.Internal;
+
+using System.Runtime.CompilerServices;
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// A ValueTask<typeparamref name="T"/> with a custom source and builder
+    /// </summary>
+    [AsyncMethodBuilder(typeof(MethodBuilders.PooledValueTaskMethodBuilder<>))]
+    public readonly struct PooledValueTask<T>
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is PooledValueTask<T> pvt && _source == pvt._source && _token == pvt._token;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => (_source == null ? 0 : _source.GetHashCode()) ^ _token;
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => nameof(PooledValueTask);
+
+        private readonly PooledState<T>? _source;
+        private readonly short _token;
+        private readonly T _result;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal PooledValueTask(PooledState<T> source, short token)
+        {
+            _source = source;
+            _token = token;
+            _result = default!;
+        }
+
+        /// <summary>
+        /// Creates a value-task with a fixed value
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public PooledValueTask(T result)
+        {
+            _source = default;
+            _token = default;
+            _result = result;
+        }
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ValueTask<T> AsValueTask() => _source == null ? new ValueTask<T>(_result) : new ValueTask<T>(_source, _token);
+
+        /// <summary>
+        /// Gets the instance as a value-task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static implicit operator ValueTask<T>(in PooledValueTask<T> task) => task.AsValueTask();
+
+        /// <summary>
+        /// Gets the awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#pragma warning disable CA2012 // 正确使用 ValueTask
+        public ValueTaskAwaiter<T> GetAwaiter() => AsValueTask().GetAwaiter();
+#pragma warning restore CA2012 // 正确使用 ValueTask
+
+        /// <summary>
+        /// Gets the configured awaiter for the task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ConfiguredValueTaskAwaitable<T> ConfigureAwait(bool continueOnCapturedContext)
+            => AsValueTask().ConfigureAwait(continueOnCapturedContext);
+
+        /// <summary>
+        /// Rents a task-source that will be recycled when the task is awaited
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static PooledValueTaskSource<T> CreateSource() => PooledValueTaskSource<T>.Create();
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source == null;
+        }
+    }
+}

src/Admin/ThingsGateway.NewLife.X/PooledAwait/Properties/AssemblyInfo.cs

@@ -0,0 +1,5 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("Benchmark, PublicKey=0024000004800000940000000602000000240000525341310004000001000100d136a87a0c11ded39332f7ead1f2ce53256a42a350ee847df1dc520bc781210a5f1fe73b3f91a4001fdcfa35340a212e70443de46e6928510f57a55f4ab9b95257f5067d4de4be8cdad460781866b20a6ca20f66302df61b52e55e16c080cad95aae8b94ffdd54718b9963d0240b0d0d5afe655b05c91771f7dc8a314387d3c3")]
+
+[assembly: InternalsVisibleTo("PooledAwait.Test, PublicKey=0024000004800000940000000602000000240000525341310004000001000100d136a87a0c11ded39332f7ead1f2ce53256a42a350ee847df1dc520bc781210a5f1fe73b3f91a4001fdcfa35340a212e70443de46e6928510f57a55f4ab9b95257f5067d4de4be8cdad460781866b20a6ca20f66302df61b52e55e16c080cad95aae8b94ffdd54718b9963d0240b0d0d5afe655b05c91771f7dc8a314387d3c3")]

src/Admin/ThingsGateway.NewLife.X/PooledAwait/ValueTaskCompletionSourceT.cs

@@ -0,0 +1,218 @@
+using System.Runtime.CompilerServices;
+
+using PooledAwait.Internal;
+
+#if !NETSTANDARD1_3
+using System.Reflection;
+#endif
+
+namespace PooledAwait
+{
+    /// <summary>
+    /// Lightweight implementation of TaskCompletionSource<typeparamref name="T"/>
+    /// </summary>
+    /// <remarks>When possible, this will bypass TaskCompletionSource<typeparamref name="T"/> completely</remarks>
+    public readonly struct ValueTaskCompletionSource<T>
+    {
+        /// <summary><see cref="Object.Equals(Object)"/></summary>
+        public override bool Equals(object? obj) => obj is ValueTaskCompletionSource<T> other && _state == other._state;
+        /// <summary><see cref="Object.GetHashCode"/></summary>
+        public override int GetHashCode() => _state == null ? 0 : _state.GetHashCode();
+        /// <summary><see cref="Object.ToString"/></summary>
+        public override string ToString() => "ValueTaskCompletionSource";
+
+#if !NETSTANDARD1_3
+        private static readonly Func<Task<T>, Exception, bool>? s_TrySetException = TryCreate<Exception>(nameof(TrySetException));
+        private static readonly Func<Task<T>, T, bool>? s_TrySetResult = TryCreate<T>(nameof(TrySetResult));
+        private static readonly Func<Task<T>, CancellationToken, bool>? s_TrySetCanceled = TryCreate<CancellationToken>(nameof(TrySetCanceled));
+        private static readonly bool s_Optimized = ValidateOptimized();
+#endif
+        private readonly object _state;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private ValueTaskCompletionSource(object state) => _state = state;
+
+        /// <summary>
+        /// Gets the instance as a task
+        /// </summary>
+        public Task<T> Task
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _state as Task<T> ?? ((TaskCompletionSource<T>)_state).Task;
+        }
+
+        /// <summary>
+        /// Indicates whether this is an invalid default instance
+        /// </summary>
+        public bool IsNull
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _state == null;
+        }
+
+        internal bool IsOptimized => _state is Task<T>;
+
+        /// <summary>
+        /// Create an instance pointing to a new task
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ValueTaskCompletionSource<T> Create() =>
+#if !NETSTANDARD1_3
+            s_Optimized ? CreateOptimized() :
+#endif
+            CreateFallback();
+
+#if !NETSTANDARD1_3
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static ValueTaskCompletionSource<T> CreateOptimized()
+        {
+            Counters.TaskAllocated.Increment();
+            return new ValueTaskCompletionSource<T>(new TaskCompletionSource<T>(TaskCreationOptions.RunContinuationsAsynchronously));
+        }
+#endif
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static ValueTaskCompletionSource<T> CreateFallback()
+        {
+            Counters.TaskAllocated.Increment();
+            return new ValueTaskCompletionSource<T>(new TaskCompletionSource<T>());
+        }
+
+        /// <summary>
+        /// Set the outcome of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetException(Exception exception)
+        {
+#if !NETSTANDARD1_3
+            if (_state is Task<T> task)
+            {
+                var result = s_TrySetException!(task, exception);
+                if (!result && !task.IsCompleted) SpinUntilCompleted(task);
+                return result;
+            }
+#endif
+            return _state != null && ((TaskCompletionSource<T>)_state).TrySetException(exception);
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetException(Exception exception)
+        {
+            if (!TrySetException(exception)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the outcome of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetCanceled(CancellationToken cancellationToken = default)
+        {
+#if !NETSTANDARD1_3
+            if (_state is Task<T> task)
+            {
+                var result = s_TrySetCanceled!(task, cancellationToken);
+                if (!result && !task.IsCompleted) SpinUntilCompleted(task);
+                return result;
+            }
+#endif
+            return _state != null && ((TaskCompletionSource<T>)_state).TrySetCanceled(
+#if !NET45
+                cancellationToken
+#endif
+                );
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetCanceled(CancellationToken cancellationToken = default)
+        {
+            if (!TrySetCanceled(cancellationToken)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+        /// <summary>
+        /// Set the outcome of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool TrySetResult(T value)
+        {
+#if !NETSTANDARD1_3
+            if (_state is Task<T> task)
+            {
+                var result = s_TrySetResult!(task, value);
+                if (!result && !task.IsCompleted) SpinUntilCompleted(task);
+                return result;
+            }
+#endif
+            return _state != null && ((TaskCompletionSource<T>)_state).TrySetResult(value);
+        }
+
+        /// <summary>
+        /// Set the result of the operation
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SetResult(T value)
+        {
+            if (!TrySetResult(value)) ThrowHelper.ThrowInvalidOperationException();
+        }
+
+#if !NETSTANDARD1_3
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        private static Func<Task<T>, TArg, bool>? TryCreate<TArg>(string methodName)
+        {
+            try
+            {
+                return (Func<Task<T>, TArg, bool>)Delegate.CreateDelegate(
+                typeof(Func<Task<T>, TArg, bool>),
+                typeof(Task<T>).GetMethod(methodName, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance,
+                    null, new[] { typeof(TArg) }, null)!);
+            }
+            catch { return null; }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        private static bool ValidateOptimized()
+        {
+            try
+            {
+                // perform feature tests of our voodoo
+                var source = CreateOptimized();
+                var task = source.Task;
+                if (task == null) return false;
+                if (task.IsCompleted) return false;
+
+                if (!source.TrySetResult(default!)) return false;
+                if (task.Status != TaskStatus.RanToCompletion) return false;
+
+                source = CreateOptimized();
+                task = source.Task;
+                if (!source.TrySetException(new InvalidOperationException())) return false;
+                if (!task.IsCompleted) return false;
+                if (!task.IsFaulted) return false;
+                try
+                {
+                    _ = task.Result;
+                    return false;
+                }
+                catch (AggregateException ex) when (ex.InnerException is InvalidOperationException) { }
+                if (!(task.Exception?.InnerException is InvalidOperationException)) return false;
+                return true;
+            }
+            catch { return false; }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        private void SpinUntilCompleted(Task<T> task)
+        {
+            // Spin wait until the completion is finalized by another thread.
+            var sw = new SpinWait();
+            while (!task.IsCompleted)
+                sw.SpinOnce();
+        }
+#endif
+    }
+}

src/Admin/ThingsGateway.NewLife.X/ThingsGateway.NewLife.X.csproj

@@ -24,7 +24,7 @@
 		<None Remove="..\..\..\README.zh-CN.md" Pack="false" PackagePath="\" />
 	</ItemGroup>
 
-	<PropertyGroup Condition="'$(TargetFramework)'=='net462' or '$(TargetFramework)'=='net5.0-windows' or '$(TargetFramework)'=='net6.0-windows' or '$(TargetFramework)'=='net7.0-windows' or '$(TargetFramework)'=='net8.0-windows'">
+	<PropertyGroup Condition="'$(TargetFramework)'=='net47' or '$(TargetFramework)'=='net5.0-windows' or '$(TargetFramework)'=='net6.0-windows' or '$(TargetFramework)'=='net7.0-windows' or '$(TargetFramework)'=='net8.0-windows'">
 		<DefineConstants>__WIN__</DefineConstants>
 	</PropertyGroup>
 
@@ -54,7 +54,26 @@
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
 	</ItemGroup>
 
+	<PropertyGroup Condition="$(TargetFramework)=='net6.0'">
+		<DefineConstants>$(DefineConstants);PLAT_THREADPOOLWORKITEM;PLAT_MRVTSC</DefineConstants>
+	</PropertyGroup>
+	<PropertyGroup Condition="$(TargetFramework)=='net8.0'">
+		<DefineConstants>$(DefineConstants);PLAT_THREADPOOLWORKITEM;PLAT_MRVTSC</DefineConstants>
+	</PropertyGroup>
 
+	<PropertyGroup Condition="$(TargetFramework)=='netstandard2.0'">
+		<DefineConstants>$(DefineConstants);PLAT_MRVTSC</DefineConstants>
+		<IncludeAsyncInterfaces>true</IncludeAsyncInterfaces>
+	</PropertyGroup>
+
+	<PropertyGroup Condition="$(TargetFramework)=='net47'">
+		<DefineConstants>$(DefineConstants);PLAT_MRVTSC</DefineConstants>
+		<IncludeAsyncInterfaces>true</IncludeAsyncInterfaces>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="9.0.10" Condition="$(IncludeAsyncInterfaces)=='true'" />
+	</ItemGroup>
 
 	<!--<ItemGroup Condition="'$(TargetFramework)'=='net6.0-windows' or '$(TargetFramework)'=='net6.0' ">
 		<PackageReference Include="Microsoft.AspNetCore.DataProtection" Version="6.0.36" />

src/Admin/ThingsGateway.NewLife.X/Threading/TimerScheduler.cs

@@ -1,4 +1,4 @@
-using System.Diagnostics;
+using PooledAwait;
 
 using ThingsGateway.NewLife.Collections;
 using ThingsGateway.NewLife.Log;
@@ -244,7 +244,7 @@ public class TimerScheduler : IDisposable, ILogFeature
                         // 必须在主线程设置状态，否则可能异步线程还没来得及设置开始状态，主线程又开始了新的一轮调度
                         timer.Calling = true;
                         if (timer.IsAsyncTask)
-                            ExecuteAsync(timer);
+                            _ = ExecuteAsync(timer);
                         //Task.Factory.StartNew(ExecuteAsync, timer, CancellationToken.None, TaskCreationOptions.None, TaskScheduler.Default);
                         else if (!timer.Async)
                             Execute(timer);
@@ -321,8 +321,7 @@ public class TimerScheduler : IDisposable, ILogFeature
         string tracerName = timer.TracerName ?? "timer:ExecuteAsync";
         string timerArg = timer.Timers.ToString();
         using var span = timer.Tracer?.NewSpan(tracerName, timerArg);
-        var sw = _stopwatchPool.Get();
-        sw.Restart();
+        var sw = ValueStopwatch.StartNew();
         try
         {
             // 弱引用判断
@@ -350,92 +349,89 @@ public class TimerScheduler : IDisposable, ILogFeature
         }
         finally
         {
-            sw.Stop();
-
-            OnExecuted(timer, (Int32)sw.ElapsedMilliseconds);
-
-            _stopwatchPool.Return(sw);
+            var ms = sw.GetElapsedTime().TotalMilliseconds;
+            OnExecuted(timer, (Int32)ms);
         }
     }
-    private static ObjectPool<Stopwatch> _stopwatchPool { get; } = new ObjectPool<Stopwatch>();
 
     /// <summary>处理每一个定时器</summary>
     /// <param name="state"></param>
-    private async void ExecuteAsync(Object? state)
+    private Task ExecuteAsync(Object? state)
     {
-        if (state is not TimerX timer) return;
-
-        //TimerX.Current = timer;
-
-        // 控制日志显示
-        //WriteLogEventArgs.CurrentThreadName = Name == "Default" ? "T" : Name;
-
-        timer.hasSetNext = false;
-
-        string tracerName = timer.TracerName ?? "timer:ExecuteAsync";
-        string timerArg = timer.Timers.ToString();
-        using var span = timer.Tracer?.NewSpan(tracerName, timerArg);
-        var sw = _stopwatchPool.Get();
-        sw.Restart();
-        try
+        return ExecuteAsync(this, state);
+        static async PooledTask ExecuteAsync(TimerScheduler @this, Object? state)
         {
-            // 弱引用判断
-            var target = timer.Target.Target;
-            if (target == null && !timer.Method.IsStatic)
+            if (state is not TimerX timer) return;
+
+            //TimerX.Current = timer;
+
+            // 控制日志显示
+            //WriteLogEventArgs.CurrentThreadName = Name == "Default" ? "T" : Name;
+
+            timer.hasSetNext = false;
+
+            string tracerName = timer.TracerName ?? "timer:ExecuteAsync";
+            string timerArg = timer.Timers.ToString();
+            using var span = timer.Tracer?.NewSpan(tracerName, timerArg);
+            var sw = ValueStopwatch.StartNew();
+            try
             {
-                Remove(timer, "委托已不存在（GC回收委托所在对象）");
-                timer.Dispose();
-                return;
-            }
+                // 弱引用判断
+                var target = timer.Target.Target;
+                if (target == null && !timer.Method.IsStatic)
+                {
+                    @this.Remove(timer, "委托已不存在（GC回收委托所在对象）");
+                    timer.Dispose();
+                    return;
+                }
 
 
 
 #if NET6_0_OR_GREATER
-            if (timer.IsValueTask)
-            {
-                if (timer.ValueTaskCachedDelegate == null)
+                if (timer.IsValueTask)
                 {
-                    timer.ValueTaskCachedDelegate = timer.Method.As<Func<Object?, ValueTask>>(target);
-                }
+                    if (timer.ValueTaskCachedDelegate == null)
+                    {
+                        timer.ValueTaskCachedDelegate = timer.Method.As<Func<Object?, ValueTask>>(target);
+                    }
 
-                //var func = timer.Method.As<Func<Object?, ValueTask>>(target);
-                var task = timer.ValueTaskCachedDelegate!(timer.State);
-                if (!task.IsCompleted)
-                    await task.ConfigureAwait(false);
-            }
-            else
+                    //var func = timer.Method.As<Func<Object?, ValueTask>>(target);
+                    var task = timer.ValueTaskCachedDelegate!(timer.State);
+                    if (!task.IsCompleted)
+                        await task.ConfigureAwait(false);
+                }
+                else
 #endif
-            {
-                if (timer.TaskCachedDelegate == null)
                 {
-                    timer.TaskCachedDelegate = timer.Method.As<Func<Object?, Task>>(target);
+                    if (timer.TaskCachedDelegate == null)
+                    {
+                        timer.TaskCachedDelegate = timer.Method.As<Func<Object?, Task>>(target);
+                    }
+
+                    //var func = timer.Method.As<Func<Object?, Task>>(target);
+                    var task = timer.TaskCachedDelegate!(timer.State);
+                    if (!task.IsCompleted)
+                        await task.ConfigureAwait(false);
                 }
 
-                //var func = timer.Method.As<Func<Object?, Task>>(target);
-                var task = timer.TaskCachedDelegate!(timer.State);
-                if (!task.IsCompleted)
-                    await task.ConfigureAwait(false);
             }
+            catch (ThreadAbortException) { throw; }
+            catch (ThreadInterruptedException) { throw; }
+            // 如果用户代码没有拦截错误，则这里拦截，避免出错了都不知道怎么回事
+            catch (Exception ex)
+            {
+                span?.SetError(ex, null);
+                XTrace.WriteException(ex);
+            }
+            finally
+            {
+                var ms = sw.GetElapsedTime().TotalMilliseconds;
 
-        }
-        catch (ThreadAbortException) { throw; }
-        catch (ThreadInterruptedException) { throw; }
-        // 如果用户代码没有拦截错误，则这里拦截，避免出错了都不知道怎么回事
-        catch (Exception ex)
-        {
-            span?.SetError(ex, null);
-            XTrace.WriteException(ex);
-        }
-        finally
-        {
-            sw.Stop();
+                @this.OnExecuted(timer, (Int32)ms);
 
-            OnExecuted(timer, (Int32)sw.ElapsedMilliseconds);
-
-            _stopwatchPool.Return(sw);
+            }
         }
     }
-
     private void OnExecuted(TimerX timer, Int32 ms)
     {
         timer.Cost = timer.Cost == 0 ? ms : (timer.Cost + ms) / 2;

src/Directory.Build.props

@@ -1,9 +1,9 @@
 <Project>
 
 	<PropertyGroup>
-		<PluginVersion>10.11.110</PluginVersion>
-		<ProPluginVersion>10.11.110</ProPluginVersion>
-		<DefaultVersion>10.11.110</DefaultVersion>
+		<PluginVersion>10.11.111</PluginVersion>
+		<ProPluginVersion>10.11.111</ProPluginVersion>
+		<DefaultVersion>10.11.111</DefaultVersion>
 		<AuthenticationVersion>10.11.6</AuthenticationVersion>
 		<SourceGeneratorVersion>10.11.6</SourceGeneratorVersion>
 		<NET8Version>8.0.21</NET8Version>
@@ -12,7 +12,7 @@
 		<IsTrimmable>false</IsTrimmable>
 		<ManagementProPluginVersion>10.11.87</ManagementProPluginVersion>
 		<ManagementPluginVersion>10.11.87</ManagementPluginVersion>
-		<TSVersion>4.0.0-beta.130</TSVersion>
+		<TSVersion>4.0.0-beta.135</TSVersion>
 		
 		
 	</PropertyGroup>

src/Foundation/ThingsGateway.Foundation/Channel/Plugin/PluginUtil.cs

@@ -34,25 +34,29 @@ public static class PluginUtil
 
             if (channelOptions.ChannelType == ChannelTypeEnum.TcpClient)
             {
-                action += a => a.UseReconnection<IClientChannel>().SetActionForCheck((channel, failCount) =>
+                action += a => a.UseReconnection<IClientChannel>(a =>
                 {
-                    if (channel.Online)
+                    a.CheckAction = (channel, failCount) =>
                     {
-                        return Task.FromResult(ConnectionCheckResult.Alive);
-                    }
-                    else
-                    {
-                        if (failCount > 1)
+                        if (channel.Online)
                         {
-                            return Task.FromResult(ConnectionCheckResult.Dead);
+                            return Task.FromResult(ConnectionCheckResult.Alive);
+                        }
+                        else
+                        {
+                            if (failCount > 1)
+                            {
+                                return Task.FromResult(ConnectionCheckResult.Dead);
+                            }
+                            return Task.FromResult(ConnectionCheckResult.Skip);
                         }
-                        return Task.FromResult(ConnectionCheckResult.Skip);
-                    }
 
 
-                })
-                .SetPollingTick(TimeSpan.FromSeconds(5)
+                    };
+                    a.PollingInterval = TimeSpan.FromSeconds(5);
 
+
+                }
                 );
             }
             return action;

src/Foundation/ThingsGateway.Foundation/Device/DeviceBase.cs

@@ -10,6 +10,8 @@
 
 using Newtonsoft.Json.Linq;
 
+using PooledAwait;
+
 using System.Net;
 
 using ThingsGateway.Foundation.Extension.Generic;
@@ -496,16 +498,21 @@ public abstract class DeviceBase : AsyncAndSyncDisposableObject, IDevice
     }
 
     /// <inheritdoc/>
-    public virtual async ValueTask<OperResult<ReadOnlyMemory<byte>>> SendThenReturnAsync(ISendMessage sendMessage, IClientChannel channel, CancellationToken cancellationToken = default)
+    public virtual ValueTask<OperResult<ReadOnlyMemory<byte>>> SendThenReturnAsync(ISendMessage sendMessage, IClientChannel channel, CancellationToken cancellationToken = default)
     {
-        try
+        return SendThenReturn(this, sendMessage, channel, cancellationToken);
+
+        static async PooledValueTask<OperResult<ReadOnlyMemory<byte>>> SendThenReturn(DeviceBase @this, ISendMessage sendMessage, IClientChannel channel, CancellationToken cancellationToken)
         {
-            var result = await SendThenReturnMessageAsync(sendMessage, channel, cancellationToken).ConfigureAwait(false);
-            return new OperResult<ReadOnlyMemory<byte>>(result) { Content = result.Content };
-        }
-        catch (Exception ex)
-        {
-            return new(ex);
+            try
+            {
+                var result = await @this.SendThenReturnMessageAsync(sendMessage, channel, cancellationToken).ConfigureAwait(false);
+                return new OperResult<ReadOnlyMemory<byte>>(result) { Content = result.Content };
+            }
+            catch (Exception ex)
+            {
+                return new(ex);
+            }
         }
     }
 
@@ -523,48 +530,83 @@ public abstract class DeviceBase : AsyncAndSyncDisposableObject, IDevice
         return GetResponsedDataAsync(command, clientChannel, Timeout, cancellationToken);
     }
 
-    private ObjectPool<ReusableCancellationTokenSource> _reusableTimeouts = new();
+    private ObjectPoolLock<ReusableCancellationTokenSource> _reusableTimeouts = new();
+    
     /// <summary>
     /// 发送并等待数据
     /// </summary>
-    protected async ValueTask<MessageBase> GetResponsedDataAsync(
+    protected ValueTask<MessageBase> GetResponsedDataAsync(
         ISendMessage command,
         IClientChannel clientChannel,
         int timeout = 3000,
         CancellationToken cancellationToken = default)
     {
-        var waitData = clientChannel.WaitHandlePool.GetWaitDataAsync(out var sign);
-        command.Sign = sign;
-        WaitLock? waitLock = null;
+        return GetResponsedDataAsync(this, command, clientChannel, timeout, cancellationToken);
 
-        try
+        static async PooledValueTask<MessageBase> GetResponsedDataAsync(DeviceBase @this, ISendMessage command, IClientChannel clientChannel, int timeout, CancellationToken cancellationToken)
         {
-            await BeforeSendAsync(clientChannel, cancellationToken).ConfigureAwait(false);
+            var waitData = clientChannel.WaitHandlePool.GetWaitDataAsync(out var sign);
+            command.Sign = sign;
+            WaitLock? waitLock = null;
 
-            waitLock = GetWaitLock(clientChannel);
-
-            await waitLock.WaitAsync(cancellationToken).ConfigureAwait(false);
-
-            clientChannel.SetDataHandlingAdapterLogger(Logger);
-
-            await SendAsync(command, clientChannel, cancellationToken).ConfigureAwait(false);
-
-            if (waitData.Status == WaitDataStatus.Success)
-                return waitData.CompletedData;
-
-            var reusableTimeout = _reusableTimeouts.Get();
-            var cts = reusableTimeout.GetTokenSource(timeout, cancellationToken, Channel.ClosedToken);
             try
             {
+                await @this.BeforeSendAsync(clientChannel, cancellationToken).ConfigureAwait(false);
 
-                await waitData.WaitAsync(cts.Token).ConfigureAwait(false);
+                waitLock = @this.GetWaitLock(clientChannel);
 
-            }
-            catch (OperationCanceledException)
-            {
-                return reusableTimeout.TimeoutStatus
-                    ? new MessageBase(new TimeoutException()) { ErrorMessage = $"Timeout, sign: {sign}" }
-                    : new MessageBase(new OperationCanceledException());
+                await waitLock.WaitAsync(cancellationToken).ConfigureAwait(false);
+
+                clientChannel.SetDataHandlingAdapterLogger(@this.Logger);
+
+                await @this.SendAsync(command, clientChannel, cancellationToken).ConfigureAwait(false);
+
+                if (waitData.Status == WaitDataStatus.Success)
+                    return waitData.CompletedData;
+
+                var reusableTimeout = @this._reusableTimeouts.Get();
+                try
+                {
+
+                    var cts = reusableTimeout.GetTokenSource(timeout, cancellationToken, @this.Channel.ClosedToken);
+                    await waitData.WaitAsync(cts.Token).ConfigureAwait(false);
+
+                }
+                catch (OperationCanceledException)
+                {
+                    return reusableTimeout.TimeoutStatus
+                        ? new MessageBase(new TimeoutException()) { ErrorMessage = $"Timeout, sign: {sign}" }
+                        : new MessageBase(new OperationCanceledException());
+                }
+                catch (Exception ex)
+                {
+                    return new MessageBase(ex);
+                }
+                finally
+                {
+                    reusableTimeout.Set();
+                    @this._reusableTimeouts.Return(reusableTimeout);
+                }
+
+                if (waitData.Status == WaitDataStatus.Success)
+                {
+                    return waitData.CompletedData;
+                }
+                else
+                {
+                    var operResult = waitData.Check(reusableTimeout.TimeoutStatus);
+                    if (waitData.CompletedData != null)
+                    {
+                        waitData.CompletedData.ErrorMessage = $"{operResult.ErrorMessage}, sign: {sign}";
+                        return waitData.CompletedData;
+                    }
+                    else
+                    {
+                        return new MessageBase(new OperationCanceledException());
+                    }
+
+                    //return new MessageBase(operResult) { ErrorMessage = $"{operResult.ErrorMessage}, sign: {sign}" };
+                }
             }
             catch (Exception ex)
             {
@@ -572,39 +614,10 @@ public abstract class DeviceBase : AsyncAndSyncDisposableObject, IDevice
             }
             finally
             {
-                reusableTimeout.Set();
-                _reusableTimeouts.Return(reusableTimeout);
-            }
+                waitLock?.Release();
+                waitData?.SafeDispose();
 
-            if (waitData.Status == WaitDataStatus.Success)
-            {
-                return waitData.CompletedData;
             }
-            else
-            {
-                var operResult = waitData.Check(reusableTimeout.TimeoutStatus);
-                if(waitData.CompletedData!=null)
-                {
-                    waitData.CompletedData.ErrorMessage = $"{operResult.ErrorMessage}, sign: {sign}";
-                    return waitData.CompletedData;
-                }
-                else
-                {
-                    return new MessageBase(new OperationCanceledException());
-                }
-
-                //return new MessageBase(operResult) { ErrorMessage = $"{operResult.ErrorMessage}, sign: {sign}" };
-            }
-        }
-        catch (Exception ex)
-        {
-            return new MessageBase(ex);
-        }
-        finally
-        {
-            waitLock?.Release();
-            waitData?.SafeDispose();
-
         }
     }
 

src/Foundation/ThingsGateway.Foundation/Device/DeviceExtension.cs

@@ -102,33 +102,77 @@ public static partial class DeviceExtension
     public static OperResult PraseStructContent<T>(this IEnumerable<T> variables, IDevice device, ReadOnlySpan<byte> buffer, bool exWhenAny) where T : IVariable
     {
         var time = DateTime.Now;
-        var result = OperResult.Success;
-        foreach (var variable in variables)
+        if (variables is IList<T> collection)
         {
-            IThingsGatewayBitConverter byteConverter = variable.ThingsGatewayBitConverter;
-            var dataType = variable.DataType;
-            int index = variable.Index;
-            try
-            {
-                var changed = byteConverter.GetChangedDataFormBytes(device, variable.RegisterAddress, buffer, index, dataType, variable.ArrayLength ?? 1, variable.RawValue, out var data);
-                if (changed)
-                {
-                    result = variable.SetValue(data, time);
-                    if (exWhenAny)
-                        if (!result.IsSuccess)
-                            return result;
-                }
-                else
-                {
-                    variable.SetNoChangedValue(time);
-                }
-            }
-            catch (Exception ex)
-            {
-                return new OperResult($"Error parsing byte array, address: {variable.RegisterAddress}, array length: {buffer.Length}, index: {index}, type: {dataType}", ex);
-            }
+            return PraseCollection(collection, device, buffer, exWhenAny, time);
+        }
+        else
+        {
+            return PraseEnumerable(variables, device, buffer, exWhenAny, time);
+
+        }
+        static OperResult PraseEnumerable(IEnumerable<T> variables, IDevice device, ReadOnlySpan<byte> buffer, bool exWhenAny, DateTime time)
+        {
+            foreach (var variable in variables)
+            {
+                IThingsGatewayBitConverter byteConverter = variable.ThingsGatewayBitConverter;
+                var dataType = variable.DataType;
+                int index = variable.Index;
+                try
+                {
+                    var changed = byteConverter.GetChangedDataFormBytes(device, variable.RegisterAddress, buffer, index, dataType, variable.ArrayLength ?? 1, variable.RawValue, out var data);
+                    if (changed)
+                    {
+                        var result = variable.SetValue(data, time);
+                        if (exWhenAny)
+                            if (!result.IsSuccess)
+                                return result;
+                    }
+                    else
+                    {
+                        variable.SetNoChangedValue(time);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    return new OperResult($"Error parsing byte array, address: {variable.RegisterAddress}, array length: {buffer.Length}, index: {index}, type: {dataType}", ex);
+                }
+            }
+
+            return OperResult.Success;
+        }
+        static OperResult PraseCollection(IList<T> variables, IDevice device, ReadOnlySpan<byte> buffer, bool exWhenAny, DateTime time)
+        {
+            for (int i = 0; i < variables.Count; i++)
+            {
+                var variable = variables[i];
+
+                IThingsGatewayBitConverter byteConverter = variable.ThingsGatewayBitConverter;
+                var dataType = variable.DataType;
+                int index = variable.Index;
+                try
+                {
+                    var changed = byteConverter.GetChangedDataFormBytes(device, variable.RegisterAddress, buffer, index, dataType, variable.ArrayLength ?? 1, variable.RawValue, out var data);
+                    if (changed)
+                    {
+                        var result = variable.SetValue(data, time);
+                        if (exWhenAny)
+                            if (!result.IsSuccess)
+                                return result;
+                    }
+                    else
+                    {
+                        variable.SetNoChangedValue(time);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    return new OperResult($"Error parsing byte array, address: {variable.RegisterAddress}, array length: {buffer.Length}, index: {index}, type: {dataType}", ex);
+                }
+            }
+
+            return OperResult.Success;
         }
-        return result;
     }
 
     /// <summary>

src/Gateway/ThingsGateway.Gateway.Application/Common/Tasks/CronScheduledTask.cs

@@ -1,4 +1,6 @@
-using ThingsGateway.NewLife;
+using PooledAwait;
+
+using ThingsGateway.NewLife;
 using ThingsGateway.NewLife.Threading;
 
 using TouchSocket.Core;
@@ -67,48 +69,52 @@ public class CronScheduledTask : DisposeBase, IScheduledTask
             _timer = new TimerX(TimerCallbackAsync, _state, _interval, nameof(CronScheduledTask)) { Async = true, Reentrant = false };
     }
 
-    private async ValueTask TimerCallbackAsync(object? state)
+    private ValueTask TimerCallbackAsync(object? state)
     {
-        if (Check()) return;
-        if (_taskFunc == null && _valueTaskFunc == null)
+        return TimerCallbackAsync(this, state);
+        static async PooledValueTask TimerCallbackAsync(CronScheduledTask @this, object? state)
         {
-            Dispose();
-            return;
-        }
-
-        Interlocked.Increment(ref _pendingTriggers);
-
-        if (Interlocked.Exchange(ref _isRunning, 1) == 1)
-            return;
-
-        // 减少一个触发次数
-        Interlocked.Decrement(ref _pendingTriggers);
-
-        try
-        {
-            if (_taskFunc != null)
-                await _taskFunc(state, _token).ConfigureAwait(false);
-            else if (_valueTaskFunc != null)
-                await _valueTaskFunc(state, _token).ConfigureAwait(false);
-        }
-        catch (OperationCanceledException)
-        {
-        }
-        catch (Exception ex)
-        {
-            LogMessage?.LogWarning(ex);
-        }
-        finally
-        {
-            Interlocked.Exchange(ref _isRunning, 0);
-        }
-
-        if (Interlocked.Exchange(ref _pendingTriggers, 0) >= 1)
-        {
-            if (!Check())
+            if (@this.Check()) return;
+            if (@this._taskFunc == null && @this._valueTaskFunc == null)
             {
-                int nextValue = next;
-                SetNext(nextValue);
+                @this.Dispose();
+                return;
+            }
+
+            Interlocked.Increment(ref @this._pendingTriggers);
+
+            if (Interlocked.Exchange(ref @this._isRunning, 1) == 1)
+                return;
+
+            // 减少一个触发次数
+            Interlocked.Decrement(ref @this._pendingTriggers);
+
+            try
+            {
+                if (@this._taskFunc != null)
+                    await @this._taskFunc(state, @this._token).ConfigureAwait(false);
+                else if (@this._valueTaskFunc != null)
+                    await @this._valueTaskFunc(state, @this._token).ConfigureAwait(false);
+            }
+            catch (OperationCanceledException)
+            {
+            }
+            catch (Exception ex)
+            {
+                @this.LogMessage?.LogWarning(ex);
+            }
+            finally
+            {
+                Interlocked.Exchange(ref @this._isRunning, 0);
+            }
+
+            if (Interlocked.Exchange(ref @this._pendingTriggers, 0) >= 1)
+            {
+                if (!@this.Check())
+                {
+                    int nextValue = @this.next;
+                    @this.SetNext(nextValue);
+                }
             }
         }
     }

src/Gateway/ThingsGateway.Gateway.Application/Common/Tasks/ScheduledAsyncTask.cs

@@ -1,4 +1,6 @@
-using ThingsGateway.NewLife;
+using PooledAwait;
+
+using ThingsGateway.NewLife;
 using ThingsGateway.NewLife.Threading;
 
 using TouchSocket.Core;
@@ -51,50 +53,54 @@ public class ScheduledAsyncTask : DisposeBase, IScheduledTask, IScheduledIntInte
             _timer = new TimerX(DoAsync, _state, IntervalMS, IntervalMS, nameof(ScheduledAsyncTask)) { Async = true, Reentrant = false };
     }
 
-    private async ValueTask DoAsync(object? state)
+    private ValueTask DoAsync(object? state)
     {
-        if (Check())
-            return;
-
-        if (_taskFunc == null && _valueTaskFunc == null)
+        return DoAsync(this, state);
+        static async PooledValueTask DoAsync(ScheduledAsyncTask @this, object? state)
         {
-            Dispose();
-            return;
-        }
+            if (@this.Check())
+                return;
 
-        Interlocked.Increment(ref _pendingTriggers);
-
-        if (Interlocked.Exchange(ref _isRunning, 1) == 1)
-            return;
-
-        // 减少一个触发次数
-        Interlocked.Decrement(ref _pendingTriggers);
-
-        try
-        {
-            if (_taskFunc != null)
-                await _taskFunc(state, _token).ConfigureAwait(false);
-            else if (_valueTaskFunc != null)
-                await _valueTaskFunc(state, _token).ConfigureAwait(false);
-        }
-        catch (OperationCanceledException)
-        {
-        }
-        catch (Exception ex)
-        {
-            LogMessage?.LogWarning(ex);
-        }
-        finally
-        {
-            Interlocked.Exchange(ref _isRunning, 0);
-        }
-
-        if (Interlocked.Exchange(ref _pendingTriggers, 0) >= 1)
-        {
-            if (!Check() && IntervalMS > 8)
+            if (@this._taskFunc == null && @this._valueTaskFunc == null)
             {
-                int nextValue = next;
-                SetNext(nextValue);
+                @this.Dispose();
+                return;
+            }
+
+            Interlocked.Increment(ref @this._pendingTriggers);
+
+            if (Interlocked.Exchange(ref @this._isRunning, 1) == 1)
+                return;
+
+            // 减少一个触发次数
+            Interlocked.Decrement(ref @this._pendingTriggers);
+
+            try
+            {
+                if (@this._taskFunc != null)
+                    await @this._taskFunc(state, @this._token).ConfigureAwait(false);
+                else if (@this._valueTaskFunc != null)
+                    await @this._valueTaskFunc(state, @this._token).ConfigureAwait(false);
+            }
+            catch (OperationCanceledException)
+            {
+            }
+            catch (Exception ex)
+            {
+                @this.LogMessage?.LogWarning(ex);
+            }
+            finally
+            {
+                Interlocked.Exchange(ref @this._isRunning, 0);
+            }
+
+            if (Interlocked.Exchange(ref @this._pendingTriggers, 0) >= 1)
+            {
+                if (!@this.Check() && @this.IntervalMS > 8)
+                {
+                    int nextValue = @this.next;
+                    @this.SetNext(nextValue);
+                }
             }
         }
     }

src/Gateway/ThingsGateway.Gateway.Application/Driver/Collect/CollectBase.cs

@@ -12,6 +12,8 @@ using Microsoft.Extensions.Logging;
 
 using Newtonsoft.Json.Linq;
 
+using PooledAwait;
+
 using System.Collections.Concurrent;
 
 using ThingsGateway.Common.Extension;
@@ -359,314 +361,316 @@ public abstract partial class CollectBase : DriverBase
     private readonly LinkedCancellationTokenSourceCache _linkedCtsCache = new();
 
     #region 执行默认读取
-    //async ValueTask ReadVariableSource(object? state, CancellationToken cancellationToken)
-    //{
-
-    //    if (state is not VariableSourceRead variableSourceRead) return;
-
-    //    if (Pause) return;
-    //    if (cancellationToken.IsCancellationRequested) return;
-    //    CancellationToken readToken = default;
-    //    var readerLockTask = ReadWriteLock.ReaderLockAsync(cancellationToken);
-    //    if (!readerLockTask.IsCompleted)
-    //    {
-    //        readToken = await readerLockTask.ConfigureAwait(false);
-    //    }
-    //    else
-    //    {
-    //        readToken = readerLockTask.Result;
-    //    }
-
-    //    if (readToken.IsCancellationRequested)
-    //    {
-    //        await ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
-    //        return;
-    //    }
-
-    //    var allTokenSource = _linkedCtsCache.GetLinkedTokenSource(cancellationToken, readToken);
-    //    var allToken = allTokenSource.Token;
-
-    //    //if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-    //    //    LogMessage?.Trace(string.Format("{0} - Collecting [{1} - {2}]", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length));
-
-    //    OperResult<ReadOnlyMemory<byte>> readResult = default;
-    //    var readTask = ReadSourceAsync(variableSourceRead, allToken);
-    //    if (!readTask.IsCompleted)
-    //    {
-    //        readResult = await readTask.ConfigureAwait(false);
-    //    }
-    //    else
-    //    {
-    //        readResult = readTask.Result;
-    //    }
-
-    //    var readErrorCount = 0;
-
-    //    // 读取失败时重试一定次数
-    //    while (!readResult.IsSuccess && readErrorCount < CollectProperties.RetryCount)
-    //    {
-    //        if (Pause)
-    //            return;
-    //        if (cancellationToken.IsCancellationRequested)
-    //            return;
-
-    //        if (readToken.IsCancellationRequested)
-    //        {
-    //            await ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
-    //            return;
-    //        }
-
-    //        readErrorCount++;
-    //        if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-    //            LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] failed - {3}", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
-
-    //        //if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-    //        //    LogMessage?.Trace(string.Format("{0} - Collecting [{1} - {2}]", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length));
-    //        var readTask1 = ReadSourceAsync(variableSourceRead, allToken);
-    //        if (!readTask1.IsCompleted)
-    //        {
-    //            readResult = await readTask1.ConfigureAwait(false);
-    //        }
-    //        else
-    //        {
-    //            readResult = readTask1.Result;
-    //        }
-
-    //    }
-
-    //    if (readResult.IsSuccess)
-    //    {
-    //        // 读取成功时记录日志并增加成功计数器
-    //        if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-    //            LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data succeeded {3}", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.Content.Span.ToHexString(' ')));
-    //        CurrentDevice.SetDeviceStatus(TimerX.Now, null);
-    //    }
-    //    else
-    //    {
-    //        if (cancellationToken.IsCancellationRequested)
-    //            return;
-
-    //        if (readToken.IsCancellationRequested)
-    //        {
-    //            await ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
-    //            return;
-    //        }
-
-    //        // 读取失败时记录日志并增加失败计数器，更新错误信息并清除变量状态
-    //        if (variableSourceRead.LastErrorMessage != readResult.ErrorMessage)
-    //        {
-    //            if (!cancellationToken.IsCancellationRequested)
-    //                LogMessage?.LogWarning(readResult.Exception, string.Format(AppResource.CollectFail, DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
-    //        }
-    //        else
-    //        {
-    //            if (!cancellationToken.IsCancellationRequested)
-    //            {
-    //                if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-    //                    LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data failed - {3}", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
-    //            }
-    //        }
-
-    //        variableSourceRead.LastErrorMessage = readResult.ErrorMessage;
-    //        CurrentDevice.SetDeviceStatus(TimerX.Now, null, readResult.ErrorMessage);
-    //        var time = DateTime.Now;
-    //        foreach (var item in variableSourceRead.VariableRuntimes)
-    //        {
-    //            item.SetValue(null, time, isOnline: false);
-    //        }
-    //    }
-    //}
-
-
-
-    private ValueTask ReadVariableSource(object? state, CancellationToken cancellationToken)
+    ValueTask ReadVariableSource(object? state, CancellationToken cancellationToken)
     {
-        var enumerator = new ReadVariableSourceEnumerator(this, state, cancellationToken);
-        return enumerator.MoveNextAsync();
-    }
-
-    private struct ReadVariableSourceEnumerator
-    {
-        private readonly CollectBase _owner;
-        private readonly object? _state;
-        private readonly CancellationToken _cancellationToken;
-
-        private VariableSourceRead _variableSourceRead;
-        private CancellationToken _readToken;
-        private CancellationToken _allToken;
-        private OperResult<ReadOnlyMemory<byte>> _readResult;
-        private int _readErrorCount;
-        private ValueTask<CancellationToken> _readerLockTask;
-        private ValueTask<OperResult<ReadOnlyMemory<byte>>> _readTask;
-        private int _step;
-
-        public ReadVariableSourceEnumerator(CollectBase owner, object? state, CancellationToken cancellationToken)
+        return ReadVariableSource(this, state, cancellationToken);
+        static async PooledValueTask ReadVariableSource(CollectBase @this, object? state, CancellationToken cancellationToken)
         {
-            _owner = owner;
-            _state = state;
-            _cancellationToken = cancellationToken;
+            if (state is not VariableSourceRead variableSourceRead) return;
 
-            _variableSourceRead = default!;
-            _readToken = default;
-            _allToken = default;
-            _readResult = default;
-            _readErrorCount = 0;
-            _readerLockTask = default;
-            _readTask = default;
-            _step = 0;
-        }
-
-        public ValueTask MoveNextAsync()
-        {
-            switch (_step)
+            if (@this.Pause) return;
+            if (cancellationToken.IsCancellationRequested) return;
+            CancellationToken readToken = default;
+            var readerLockTask = @this.ReadWriteLock.ReaderLockAsync(cancellationToken);
+            if (!readerLockTask.IsCompleted)
             {
-                case 0:
-                    if (_state is not VariableSourceRead vsr) return default;
-                    _variableSourceRead = vsr;
-
-                    if (_owner.Pause) return default;
-                    if (_cancellationToken.IsCancellationRequested) return default;
-
-#pragma warning disable CA2012 // 正确使用 ValueTask
-                    _readerLockTask = _owner.ReadWriteLock.ReaderLockAsync(_cancellationToken);
-#pragma warning restore CA2012 // 正确使用 ValueTask
-                    if (!_readerLockTask.IsCompleted)
-                    {
-                        _step = 1;
-                        return AwaitReaderLock();
-                    }
-                    _readToken = _readerLockTask.Result;
-                    goto case 2;
-
-                case 1:
-                    _readToken = _readerLockTask.Result;
-                    goto case 2;
-
-                case 2:
-                    if (_readToken.IsCancellationRequested)
-                    {
-                        return _owner.ReadVariableSource(_state, _cancellationToken);
-                    }
-
-                    var allTokenSource = _owner._linkedCtsCache.GetLinkedTokenSource(_cancellationToken, _readToken);
-                    _allToken = allTokenSource.Token;
-
-#pragma warning disable CA2012 // 正确使用 ValueTask
-                    _readTask = _owner.ReadSourceAsync(_variableSourceRead, _allToken);
-#pragma warning restore CA2012 // 正确使用 ValueTask
-                    if (!_readTask.IsCompleted)
-                    {
-                        _step = 3;
-                        return AwaitRead();
-                    }
-                    _readResult = _readTask.Result;
-                    goto case 4;
-
-                case 3:
-                    _readResult = _readTask.Result;
-                    goto case 4;
-
-                case 4:
-                    while (!_readResult.IsSuccess && _readErrorCount < _owner.CollectProperties.RetryCount)
-                    {
-                        if (_owner.Pause) return default;
-                        if (_cancellationToken.IsCancellationRequested) return default;
-
-                        if (_readToken.IsCancellationRequested)
-                        {
-                            return _owner.ReadVariableSource(_state, _cancellationToken);
-                        }
-
-                        _readErrorCount++;
-                        if (_owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-                            _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] failed - {3}",
-                                _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
-
-#pragma warning disable CA2012 // 正确使用 ValueTask
-                        _readTask = _owner.ReadSourceAsync(_variableSourceRead, _allToken);
-#pragma warning restore CA2012 // 正确使用 ValueTask
-                        if (!_readTask.IsCompleted)
-                        {
-                            _step = 5;
-                            return AwaitReadRetry();
-                        }
-                        _readResult = _readTask.Result;
-                    }
-
-                    goto case 6;
-
-                case 5:
-                    _readResult = _readTask.Result;
-                    _step = 4;
-                    return MoveNextAsync();
-
-                case 6:
-                    if (_readResult.IsSuccess)
-                    {
-                        if (_owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-                            _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data succeeded {3}",
-                                _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.Content.Span.ToHexString(' ')));
-
-                        _owner.CurrentDevice.SetDeviceStatus(TimerX.Now, null);
-                    }
-                    else
-                    {
-                        if (_cancellationToken.IsCancellationRequested) return default;
-                        if (_readToken.IsCancellationRequested)
-                        {
-                            return _owner.ReadVariableSource(_state, _cancellationToken);
-                        }
-
-                        if (_variableSourceRead.LastErrorMessage != _readResult.ErrorMessage)
-                        {
-                            if (!_cancellationToken.IsCancellationRequested)
-                                _owner.LogMessage?.LogWarning(_readResult.Exception, string.Format(AppResource.CollectFail, _owner.DeviceName,
-                                    _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
-                        }
-                        else
-                        {
-                            if (!_cancellationToken.IsCancellationRequested && _owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
-                                _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data failed - {3}",
-                                    _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
-                        }
-
-                        _variableSourceRead.LastErrorMessage = _readResult.ErrorMessage;
-                        _owner.CurrentDevice.SetDeviceStatus(TimerX.Now, null, _readResult.ErrorMessage);
-                        var time = DateTime.Now;
-                        foreach (var item in _variableSourceRead.VariableRuntimes)
-                        {
-                            item.SetValue(null, time, isOnline: false);
-                        }
-                    }
-                    break;
+                readToken = await readerLockTask.ConfigureAwait(false);
+            }
+            else
+            {
+                readToken = readerLockTask.Result;
             }
 
-            return default;
-        }
+            if (readToken.IsCancellationRequested)
+            {
+                await @this.ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
+                return;
+            }
 
-        private async ValueTask AwaitReaderLock()
-        {
-            await _readerLockTask.ConfigureAwait(false);
-            _step = 1;
-            await MoveNextAsync().ConfigureAwait(false);
-        }
+            var allTokenSource = @this._linkedCtsCache.GetLinkedTokenSource(cancellationToken, readToken);
+            var allToken = allTokenSource.Token;
 
-        private async ValueTask AwaitRead()
-        {
-            await _readTask.ConfigureAwait(false);
-            _step = 3;
-            await MoveNextAsync().ConfigureAwait(false);
-        }
+            //if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+            //    LogMessage?.Trace(string.Format("{0} - Collecting [{1} - {2}]", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length));
 
-        private async ValueTask AwaitReadRetry()
-        {
-            await _readTask.ConfigureAwait(false);
-            _step = 5;
-            await MoveNextAsync().ConfigureAwait(false);
+            OperResult<ReadOnlyMemory<byte>> readResult = default;
+            var readTask = @this.ReadSourceAsync(variableSourceRead, allToken);
+            if (!readTask.IsCompleted)
+            {
+                readResult = await readTask.ConfigureAwait(false);
+            }
+            else
+            {
+                readResult = readTask.Result;
+            }
+
+            var readErrorCount = 0;
+
+            // 读取失败时重试一定次数
+            while (!readResult.IsSuccess && readErrorCount < @this.CollectProperties.RetryCount)
+            {
+                if (@this.Pause)
+                    return;
+                if (cancellationToken.IsCancellationRequested)
+                    return;
+
+                if (readToken.IsCancellationRequested)
+                {
+                    await @this.ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
+                    return;
+                }
+
+                readErrorCount++;
+                if (@this.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+                    @this.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] failed - {3}", @this.DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
+
+                //if (LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+                //    LogMessage?.Trace(string.Format("{0} - Collecting [{1} - {2}]", DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length));
+                var readTask1 = @this.ReadSourceAsync(variableSourceRead, allToken);
+                if (!readTask1.IsCompleted)
+                {
+                    readResult = await readTask1.ConfigureAwait(false);
+                }
+                else
+                {
+                    readResult = readTask1.Result;
+                }
+
+            }
+
+            if (readResult.IsSuccess)
+            {
+                // 读取成功时记录日志并增加成功计数器
+                if (@this.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+                    @this.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data succeeded {3}", @this.DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.Content.Span.ToHexString(' ')));
+                @this.CurrentDevice.SetDeviceStatus(TimerX.Now, null);
+            }
+            else
+            {
+                if (cancellationToken.IsCancellationRequested)
+                    return;
+
+                if (readToken.IsCancellationRequested)
+                {
+                    await @this.ReadVariableSource(state, cancellationToken).ConfigureAwait(false);
+                    return;
+                }
+
+                // 读取失败时记录日志并增加失败计数器，更新错误信息并清除变量状态
+                if (variableSourceRead.LastErrorMessage != readResult.ErrorMessage)
+                {
+                    if (!cancellationToken.IsCancellationRequested)
+                        @this.LogMessage?.LogWarning(readResult.Exception, string.Format(AppResource.CollectFail, @this.DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
+                }
+                else
+                {
+                    if (!cancellationToken.IsCancellationRequested)
+                    {
+                        if (@this.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+                            @this.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data failed - {3}", @this.DeviceName, variableSourceRead?.RegisterAddress, variableSourceRead?.Length, readResult.ErrorMessage));
+                    }
+                }
+
+                variableSourceRead.LastErrorMessage = readResult.ErrorMessage;
+                @this.CurrentDevice.SetDeviceStatus(TimerX.Now, null, readResult.ErrorMessage);
+                var time = DateTime.Now;
+                foreach (var item in variableSourceRead.VariableRuntimes)
+                {
+                    item.SetValue(null, time, isOnline: false);
+                }
+            }
         }
     }
 
 
+    //    private ValueTask ReadVariableSource(object? state, CancellationToken cancellationToken)
+    //    {
+    //        var enumerator = new ReadVariableSourceEnumerator(this, state, cancellationToken);
+    //        return enumerator.MoveNextAsync();
+    //    }
+
+    //    private struct ReadVariableSourceEnumerator
+    //    {
+    //        private readonly CollectBase _owner;
+    //        private readonly object? _state;
+    //        private readonly CancellationToken _cancellationToken;
+
+    //        private VariableSourceRead _variableSourceRead;
+    //        private CancellationToken _readToken;
+    //        private CancellationToken _allToken;
+    //        private OperResult<ReadOnlyMemory<byte>> _readResult;
+    //        private int _readErrorCount;
+    //        private ValueTask<CancellationToken> _readerLockTask;
+    //        private ValueTask<OperResult<ReadOnlyMemory<byte>>> _readTask;
+    //        private int _step;
+
+    //        public ReadVariableSourceEnumerator(CollectBase owner, object? state, CancellationToken cancellationToken)
+    //        {
+    //            _owner = owner;
+    //            _state = state;
+    //            _cancellationToken = cancellationToken;
+
+    //            _variableSourceRead = default!;
+    //            _readToken = default;
+    //            _allToken = default;
+    //            _readResult = default;
+    //            _readErrorCount = 0;
+    //            _readerLockTask = default;
+    //            _readTask = default;
+    //            _step = 0;
+    //        }
+
+    //        public ValueTask MoveNextAsync()
+    //        {
+    //            switch (_step)
+    //            {
+    //                case 0:
+    //                    if (_state is not VariableSourceRead vsr) return default;
+    //                    _variableSourceRead = vsr;
+
+    //                    if (_owner.Pause) return default;
+    //                    if (_cancellationToken.IsCancellationRequested) return default;
+
+    //#pragma warning disable CA2012 // 正确使用 ValueTask
+    //                    _readerLockTask = _owner.ReadWriteLock.ReaderLockAsync(_cancellationToken);
+    //#pragma warning restore CA2012 // 正确使用 ValueTask
+    //                    if (!_readerLockTask.IsCompleted)
+    //                    {
+    //                        _step = 1;
+    //                        return AwaitReaderLock();
+    //                    }
+    //                    _readToken = _readerLockTask.Result;
+    //                    goto case 2;
+
+    //                case 1:
+    //                    _readToken = _readerLockTask.Result;
+    //                    goto case 2;
+
+    //                case 2:
+    //                    if (_readToken.IsCancellationRequested)
+    //                    {
+    //                        return _owner.ReadVariableSource(_state, _cancellationToken);
+    //                    }
+
+    //                    var allTokenSource = _owner._linkedCtsCache.GetLinkedTokenSource(_cancellationToken, _readToken);
+    //                    _allToken = allTokenSource.Token;
+
+    //#pragma warning disable CA2012 // 正确使用 ValueTask
+    //                    _readTask = _owner.ReadSourceAsync(_variableSourceRead, _allToken);
+    //#pragma warning restore CA2012 // 正确使用 ValueTask
+    //                    if (!_readTask.IsCompleted)
+    //                    {
+    //                        _step = 3;
+    //                        return AwaitRead();
+    //                    }
+    //                    _readResult = _readTask.Result;
+    //                    goto case 4;
+
+    //                case 3:
+    //                    _readResult = _readTask.Result;
+    //                    goto case 4;
+
+    //                case 4:
+    //                    while (!_readResult.IsSuccess && _readErrorCount < _owner.CollectProperties.RetryCount)
+    //                    {
+    //                        if (_owner.Pause) return default;
+    //                        if (_cancellationToken.IsCancellationRequested) return default;
+
+    //                        if (_readToken.IsCancellationRequested)
+    //                        {
+    //                            return _owner.ReadVariableSource(_state, _cancellationToken);
+    //                        }
+
+    //                        _readErrorCount++;
+    //                        if (_owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+    //                            _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] failed - {3}",
+    //                                _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
+
+    //#pragma warning disable CA2012 // 正确使用 ValueTask
+    //                        _readTask = _owner.ReadSourceAsync(_variableSourceRead, _allToken);
+    //#pragma warning restore CA2012 // 正确使用 ValueTask
+    //                        if (!_readTask.IsCompleted)
+    //                        {
+    //                            _step = 5;
+    //                            return AwaitReadRetry();
+    //                        }
+    //                        _readResult = _readTask.Result;
+    //                    }
+
+    //                    goto case 6;
+
+    //                case 5:
+    //                    _readResult = _readTask.Result;
+    //                    _step = 4;
+    //                    return MoveNextAsync();
+
+    //                case 6:
+    //                    if (_readResult.IsSuccess)
+    //                    {
+    //                        if (_owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+    //                            _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data succeeded {3}",
+    //                                _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.Content.Span.ToHexString(' ')));
+
+    //                        _owner.CurrentDevice.SetDeviceStatus(TimerX.Now, null);
+    //                    }
+    //                    else
+    //                    {
+    //                        if (_cancellationToken.IsCancellationRequested) return default;
+    //                        if (_readToken.IsCancellationRequested)
+    //                        {
+    //                            return _owner.ReadVariableSource(_state, _cancellationToken);
+    //                        }
+
+    //                        if (_variableSourceRead.LastErrorMessage != _readResult.ErrorMessage)
+    //                        {
+    //                            if (!_cancellationToken.IsCancellationRequested)
+    //                                _owner.LogMessage?.LogWarning(_readResult.Exception, string.Format(AppResource.CollectFail, _owner.DeviceName,
+    //                                    _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
+    //                        }
+    //                        else
+    //                        {
+    //                            if (!_cancellationToken.IsCancellationRequested && _owner.LogMessage?.LogLevel <= TouchSocket.Core.LogLevel.Trace)
+    //                                _owner.LogMessage?.Trace(string.Format("{0} - Collection [{1} - {2}] data failed - {3}",
+    //                                    _owner.DeviceName, _variableSourceRead?.RegisterAddress, _variableSourceRead?.Length, _readResult.ErrorMessage));
+    //                        }
+
+    //                        _variableSourceRead.LastErrorMessage = _readResult.ErrorMessage;
+    //                        _owner.CurrentDevice.SetDeviceStatus(TimerX.Now, null, _readResult.ErrorMessage);
+    //                        var time = DateTime.Now;
+    //                        foreach (var item in _variableSourceRead.VariableRuntimes)
+    //                        {
+    //                            item.SetValue(null, time, isOnline: false);
+    //                        }
+    //                    }
+    //                    break;
+    //            }
+
+    //            return default;
+    //        }
+
+    //        private async ValueTask AwaitReaderLock()
+    //        {
+    //            await _readerLockTask.ConfigureAwait(false);
+    //            _step = 1;
+    //            await MoveNextAsync().ConfigureAwait(false);
+    //        }
+
+    //        private async ValueTask AwaitRead()
+    //        {
+    //            await _readTask.ConfigureAwait(false);
+    //            _step = 3;
+    //            await MoveNextAsync().ConfigureAwait(false);
+    //        }
+
+    //        private async ValueTask AwaitReadRetry()
+    //        {
+    //            await _readTask.ConfigureAwait(false);
+    //            _step = 5;
+    //            await MoveNextAsync().ConfigureAwait(false);
+    //        }
+    //    }
+
+
     #endregion
 
 

src/Gateway/ThingsGateway.Gateway.Application/Driver/Collect/CollectFoundationBase.cs

@@ -12,6 +12,8 @@ using Microsoft.Extensions.Logging;
 
 using Newtonsoft.Json.Linq;
 
+using PooledAwait;
+
 using System.Collections.Concurrent;
 
 using ThingsGateway.Common.Extension;
@@ -149,152 +151,160 @@ public abstract class CollectFoundationBase : CollectBase
 
 
 
-    //protected override async ValueTask<OperResult<ReadOnlyMemory<byte>>> ReadSourceAsync(VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
-    //{
-    //    try
-    //    {
-
-    //        if (cancellationToken.IsCancellationRequested)
-    //            return new(new OperationCanceledException());
-
-    //        // 从协议读取数据
-    //        OperResult<ReadOnlyMemory<byte>> read = default;
-    //        var readTask = FoundationDevice.ReadAsync(variableSourceRead.AddressObject, cancellationToken);
-    //        if (!readTask.IsCompleted)
-    //        {
-    //            read = await readTask.ConfigureAwait(false);
-    //        }
-    //        else
-    //        {
-    //            read = readTask.Result;
-    //        }
-
-    //        // 如果读取成功且有有效内容，则解析结构化内容
-    //        if (read.IsSuccess)
-    //        {
-    //            var prase = variableSourceRead.VariableRuntimes.PraseStructContent(FoundationDevice, read.Content.Span, false);
-    //            return new OperResult<ReadOnlyMemory<byte>>(prase);
-    //        }
-
-    //        // 返回读取结果
-    //        return read;
-    //    }
-    //    catch (Exception ex)
-    //    {
-    //        // 捕获异常并返回失败结果
-    //        return new OperResult<ReadOnlyMemory<byte>>(ex);
-    //    }
-    //}
-    /// <summary>
-    /// 采集驱动读取，读取成功后直接赋值变量，失败不做处理，注意非通用设备需重写
-    /// </summary>
     protected override ValueTask<OperResult<ReadOnlyMemory<byte>>> ReadSourceAsync(VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
     {
-        if (cancellationToken.IsCancellationRequested)
-            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>( new OperResult<ReadOnlyMemory<byte>>(new OperationCanceledException()));
+        return ReadSourceAsync(this, variableSourceRead, cancellationToken);
 
-        // 值类型状态机
-        var stateMachine = new ReadSourceStateMachine(this, variableSourceRead, cancellationToken);
-        return stateMachine.MoveNextAsync();
-    }
 
-    private struct ReadSourceStateMachine
-    {
-        private readonly VariableSourceRead _variableSourceRead;
-        private readonly CancellationToken _cancellationToken;
-        private readonly CollectFoundationBase _owner;
-        private OperResult<ReadOnlyMemory<byte>> _result;
-        private ValueTask<OperResult<ReadOnlyMemory<byte>>> _readTask;
-
-        public ReadSourceStateMachine(CollectFoundationBase owner, VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
-        {
-            _owner = owner;
-            _variableSourceRead = variableSourceRead;
-            _cancellationToken = cancellationToken;
-            _result = default;
-            State = 0;
-        }
-
-        public int State { get; private set; }
-
-        public ValueTask<OperResult<ReadOnlyMemory<byte>>> MoveNextAsync()
+        static async PooledValueTask<OperResult<ReadOnlyMemory<byte>>> ReadSourceAsync(CollectFoundationBase @this, VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
         {
             try
             {
-                switch (State)
+
+                if (cancellationToken.IsCancellationRequested)
+                    return new(new OperationCanceledException());
+
+                // 从协议读取数据
+                OperResult<ReadOnlyMemory<byte>> read = default;
+                var readTask = @this.FoundationDevice.ReadAsync(variableSourceRead.AddressObject, cancellationToken);
+                if (!readTask.IsCompleted)
                 {
-                    case 0:
-                        // 异步读取
-                        if (_cancellationToken.IsCancellationRequested)
-                        {
-                            _result = new OperResult<ReadOnlyMemory<byte>>(new OperationCanceledException());
-                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
-                        }
-
-#pragma warning disable CA2012 // 正确使用 ValueTask
-                        _readTask = _owner.FoundationDevice.ReadAsync(_variableSourceRead.AddressObject, _cancellationToken);
-#pragma warning restore CA2012 // 正确使用 ValueTask
-
-                        // 检查是否任务已完成
-                        if (_readTask.IsCompleted)
-                        {
-                            _result = _readTask.Result;
-                            State = 1;
-                            return MoveNextAsync();
-                        }
-
-                        // 如果任务尚未完成，继续等待
-                        State = 2;
-                        return Awaited(_readTask);
-
-                    case 1:
-                        // 解析结构化内容
-                        if (_result.IsSuccess)
-                        {
-                            var parsedResult = _variableSourceRead.VariableRuntimes.PraseStructContent(_owner.FoundationDevice, _result.Content.Span, false);
-                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(parsedResult));
-                        }
-
-                        return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
-
-                    case 2:
-                        // 完成任务后，解析内容
-                        _result = _readTask.Result;
-
-                        if (_result.IsSuccess)
-                        {
-                            var parsedResult = _variableSourceRead.VariableRuntimes.PraseStructContent(_owner.FoundationDevice, _result.Content.Span, false);
-                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(parsedResult));
-                        }
-
-                        return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
-
-                    default:
-                        throw new InvalidOperationException("Unexpected state.");
+                    read = await readTask.ConfigureAwait(false);
                 }
+                else
+                {
+                    read = readTask.Result;
+                }
+
+                // 如果读取成功且有有效内容，则解析结构化内容
+                if (read.IsSuccess)
+                {
+                    var prase = variableSourceRead.VariableRuntimes.PraseStructContent(@this.FoundationDevice, read.Content.Span, false);
+                    return new OperResult<ReadOnlyMemory<byte>>(prase);
+                }
+
+                // 返回读取结果
+                return read;
             }
             catch (Exception ex)
             {
-                return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(ex));
-            }
-        }
-
-        private async ValueTask<OperResult<ReadOnlyMemory<byte>>> Awaited(ValueTask<OperResult<ReadOnlyMemory<byte>>> vt)
-        {
-            try
-            {
-
-
-                await vt.ConfigureAwait(false);
-                return await MoveNextAsync().ConfigureAwait(false);
-            }
-            catch (Exception ex)
-            {
+                // 捕获异常并返回失败结果
                 return new OperResult<ReadOnlyMemory<byte>>(ex);
             }
         }
+
     }
 
+    ///// <summary>
+    ///// 采集驱动读取，读取成功后直接赋值变量，失败不做处理，注意非通用设备需重写
+    ///// </summary>
+    //    protected override ValueTask<OperResult<ReadOnlyMemory<byte>>> ReadSourceAsync(VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
+    //    {
+    //        if (cancellationToken.IsCancellationRequested)
+    //            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>( new OperResult<ReadOnlyMemory<byte>>(new OperationCanceledException()));
+
+    //        // 值类型状态机
+    //        var stateMachine = new ReadSourceStateMachine(this, variableSourceRead, cancellationToken);
+    //        return stateMachine.MoveNextAsync();
+    //    }
+
+    //    private struct ReadSourceStateMachine
+    //    {
+    //        private readonly VariableSourceRead _variableSourceRead;
+    //        private readonly CancellationToken _cancellationToken;
+    //        private readonly CollectFoundationBase _owner;
+    //        private OperResult<ReadOnlyMemory<byte>> _result;
+    //        private ValueTask<OperResult<ReadOnlyMemory<byte>>> _readTask;
+
+    //        public ReadSourceStateMachine(CollectFoundationBase owner, VariableSourceRead variableSourceRead, CancellationToken cancellationToken)
+    //        {
+    //            _owner = owner;
+    //            _variableSourceRead = variableSourceRead;
+    //            _cancellationToken = cancellationToken;
+    //            _result = default;
+    //            State = 0;
+    //        }
+
+    //        public int State { get; private set; }
+
+    //        public ValueTask<OperResult<ReadOnlyMemory<byte>>> MoveNextAsync()
+    //        {
+    //            try
+    //            {
+    //                switch (State)
+    //                {
+    //                    case 0:
+    //                        // 异步读取
+    //                        if (_cancellationToken.IsCancellationRequested)
+    //                        {
+    //                            _result = new OperResult<ReadOnlyMemory<byte>>(new OperationCanceledException());
+    //                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
+    //                        }
+
+    //#pragma warning disable CA2012 // 正确使用 ValueTask
+    //                        _readTask = _owner.FoundationDevice.ReadAsync(_variableSourceRead.AddressObject, _cancellationToken);
+    //#pragma warning restore CA2012 // 正确使用 ValueTask
+
+    //                        // 检查是否任务已完成
+    //                        if (_readTask.IsCompleted)
+    //                        {
+    //                            _result = _readTask.Result;
+    //                            State = 1;
+    //                            return MoveNextAsync();
+    //                        }
+
+    //                        // 如果任务尚未完成，继续等待
+    //                        State = 2;
+    //                        return Awaited(_readTask);
+
+    //                    case 1:
+    //                        // 解析结构化内容
+    //                        if (_result.IsSuccess)
+    //                        {
+    //                            var parsedResult = _variableSourceRead.VariableRuntimes.PraseStructContent(_owner.FoundationDevice, _result.Content.Span, false);
+    //                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(parsedResult));
+    //                        }
+
+    //                        return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
+
+    //                    case 2:
+    //                        // 完成任务后，解析内容
+    //                        _result = _readTask.Result;
+
+    //                        if (_result.IsSuccess)
+    //                        {
+    //                            var parsedResult = _variableSourceRead.VariableRuntimes.PraseStructContent(_owner.FoundationDevice, _result.Content.Span, false);
+    //                            return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(parsedResult));
+    //                        }
+
+    //                        return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(_result);
+
+    //                    default:
+    //                        throw new InvalidOperationException("Unexpected state.");
+    //                }
+    //            }
+    //            catch (Exception ex)
+    //            {
+    //                return new ValueTask<OperResult<ReadOnlyMemory<byte>>>(new OperResult<ReadOnlyMemory<byte>>(ex));
+    //            }
+    //        }
+
+    //        private async ValueTask<OperResult<ReadOnlyMemory<byte>>> Awaited(ValueTask<OperResult<ReadOnlyMemory<byte>>> vt)
+    //        {
+    //            try
+    //            {
+
+
+    //                await vt.ConfigureAwait(false);
+    //                return await MoveNextAsync().ConfigureAwait(false);
+    //            }
+    //            catch (Exception ex)
+    //            {
+    //                return new OperResult<ReadOnlyMemory<byte>>(ex);
+    //            }
+    //        }
+    //    }
+
     /// <summary>
     /// 批量写入变量值,需返回变量名称/结果，注意非通用设备需重写
     /// </summary>

src/Plugin/ThingsGateway.Foundation.Benchmark/Benchmark/SemaphoreBenchmark.cs

@@ -0,0 +1,94 @@
+//------------------------------------------------------------------------------
+//  此代码版权声明为全文件覆盖，如有原作者特别声明，会在下方手动补充
+//  此代码版权（除特别声明外的代码）归作者本人Diego所有
+//  源代码使用协议遵循本仓库的开源协议及附加协议
+//  Gitee源代码仓库：https://gitee.com/diego2098/ThingsGateway
+//  Github源代码仓库：https://github.com/kimdiego2098/ThingsGateway
+//  使用文档：https://kimdiego2098.github.io/
+//  QQ群：605534569
+//------------------------------------------------------------------------------
+
+namespace ThingsGateway.Foundation;
+
+using BenchmarkDotNet.Attributes;
+
+using PooledAwait;
+
+using System.Threading;
+using System.Threading.Tasks;
+
+using ThingsGateway.NewLife;
+
+[MemoryDiagnoser]
+[ThreadingDiagnoser]
+public class SemaphoreBenchmark
+{
+    private readonly SemaphoreSlim _semaphoreSlim = new SemaphoreSlim(1);
+    private readonly WaitLock _waitLock = new WaitLock("SemaphoreBenchmark");
+
+    [Params(100)]
+    public int Iterations;
+
+    [Benchmark(Baseline = true)]
+    public async Task SemaphoreSlim_WaitRelease()
+    {
+
+        for (int i = 0; i < Iterations; i++)
+        {
+            await _semaphoreSlim.WaitAsync().ConfigureAwait(false);
+
+            await Task.Delay(1);
+            _semaphoreSlim.Release();
+        }
+
+    }
+
+
+    [Benchmark]
+    public async Task ReusableAsyncSemaphore_WaitRelease()
+    {
+        for (int i = 0; i < Iterations; i++)
+        {
+            await _waitLock.WaitAsync().ConfigureAwait(false);
+
+            await Task.Delay(1);
+            _waitLock.Release();
+        }
+    }
+    [Benchmark]
+    public async Task SemaphoreSlim_WaitReleaseToken()
+    {
+
+        for (int i = 0; i < Iterations; i++)
+        {
+            using var cts = new CancellationTokenSource(1000);
+
+            await _semaphoreSlim.WaitAsync(cts.Token).ConfigureAwait(false);
+
+            await Task.Delay(1);
+            _semaphoreSlim.Release();
+        }
+
+    }
+
+
+    [Benchmark]
+    public ValueTask ReusableAsyncSemaphore_WaitReleaseToken()
+    {
+        return ReusableAsyncSemaphore_WaitReleaseToken(this);
+
+        static async PooledValueTask ReusableAsyncSemaphore_WaitReleaseToken(SemaphoreBenchmark @this)
+        {
+            for (int i = 0; i < @this.Iterations; i++)
+            {
+                using var cts = new CancellationTokenSource(1000);
+
+                await @this._waitLock.WaitAsync(cts.Token).ConfigureAwait(false);
+
+                await Task.Delay(1);
+                @this._waitLock.Release();
+            }
+        }
+    }
+}
+

src/Plugin/ThingsGateway.Foundation.Benchmark/Benchmark/TimeoutBenchmark.cs

@@ -35,11 +35,11 @@ public class TimeoutBenchmark
             }
     }
 
-    private ObjectPool<ReusableCancellationTokenSource> _reusableTimeouts;
+    private ObjectPoolLock<ReusableCancellationTokenSource> _reusableTimeouts;
     [Benchmark]
     public async ValueTask ReusableTimeoutWaitAsync()
     {
-        _reusableTimeouts ??= new();
+        _reusableTimeouts ??= new ObjectPoolLock<ReusableCancellationTokenSource>();
         using var otherCts = new CancellationTokenSource();
         for (int i1 = 0; i1 < 10; i1++)
             for (int i = 0; i < 10; i++)

src/Plugin/ThingsGateway.Foundation.Benchmark/Program.cs

@@ -48,10 +48,14 @@ namespace BenchmarkConsoleApp
             //.WithOptions(ConfigOptions.DisableOptimizationsValidator)
             //);
 
-            BenchmarkRunner.Run<ModbusBenchmark>(
+            BenchmarkRunner.Run<SemaphoreBenchmark>(
        ManualConfig.Create(DefaultConfig.Instance)
            .WithOptions(ConfigOptions.DisableOptimizationsValidator)
    );
+//            BenchmarkRunner.Run<ModbusBenchmark>(
+//ManualConfig.Create(DefaultConfig.Instance)
+//.WithOptions(ConfigOptions.DisableOptimizationsValidator)
+//);
             //            BenchmarkRunner.Run<S7Benchmark>(
             //ManualConfig.Create(DefaultConfig.Instance)
             //.WithOptions(ConfigOptions.DisableOptimizationsValidator)

src/ThingsGateway.sln

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 18
-VisualStudioVersion = 18.0.11018.127 d18.0
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36603.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ThingsGateway.Server", "ThingsGateway.Server\ThingsGateway.Server.csproj", "{22875EFB-DADF-4612-A572-33BCC092F644}"
 EndProject
@@ -356,7 +356,7 @@ Global
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {199B1B96-4F56-4828-9531-813BA02DB282}
-		RESX_NeutralResourcesLanguage = zh-Hans
 		RESX_Rules = {"EnabledRules":[]}
+		RESX_NeutralResourcesLanguage = zh-Hans
 	EndGlobalSection
 EndGlobal