Init TEngine4.0.0

Init TEngine4.0.0

UnityProject/Packages/UniTask/Runtime/UniTaskSynchronizationContext.cs

@@ -0,0 +1,158 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+namespace Cysharp.Threading.Tasks
+{
+    public class UniTaskSynchronizationContext : SynchronizationContext
+    {
+        const int MaxArrayLength = 0X7FEFFFFF;
+        const int InitialSize = 16;
+
+        static SpinLock gate = new SpinLock(false);
+        static bool dequing = false;
+
+        static int actionListCount = 0;
+        static Callback[] actionList = new Callback[InitialSize];
+
+        static int waitingListCount = 0;
+        static Callback[] waitingList = new Callback[InitialSize];
+
+        static int opCount;
+
+        public override void Send(SendOrPostCallback d, object state)
+        {
+            d(state);
+        }
+
+        public override void Post(SendOrPostCallback d, object state)
+        {
+            bool lockTaken = false;
+            try
+            {
+                gate.Enter(ref lockTaken);
+
+                if (dequing)
+                {
+                    // Ensure Capacity
+                    if (waitingList.Length == waitingListCount)
+                    {
+                        var newLength = waitingListCount * 2;
+                        if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
+
+                        var newArray = new Callback[newLength];
+                        Array.Copy(waitingList, newArray, waitingListCount);
+                        waitingList = newArray;
+                    }
+                    waitingList[waitingListCount] = new Callback(d, state);
+                    waitingListCount++;
+                }
+                else
+                {
+                    // Ensure Capacity
+                    if (actionList.Length == actionListCount)
+                    {
+                        var newLength = actionListCount * 2;
+                        if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
+
+                        var newArray = new Callback[newLength];
+                        Array.Copy(actionList, newArray, actionListCount);
+                        actionList = newArray;
+                    }
+                    actionList[actionListCount] = new Callback(d, state);
+                    actionListCount++;
+                }
+            }
+            finally
+            {
+                if (lockTaken) gate.Exit(false);
+            }
+        }
+
+        public override void OperationStarted()
+        {
+            Interlocked.Increment(ref opCount);
+        }
+
+        public override void OperationCompleted()
+        {
+            Interlocked.Decrement(ref opCount);
+        }
+
+        public override SynchronizationContext CreateCopy()
+        {
+            return this;
+        }
+
+        // delegate entrypoint.
+        internal static void Run()
+        {
+            {
+                bool lockTaken = false;
+                try
+                {
+                    gate.Enter(ref lockTaken);
+                    if (actionListCount == 0) return;
+                    dequing = true;
+                }
+                finally
+                {
+                    if (lockTaken) gate.Exit(false);
+                }
+            }
+
+            for (int i = 0; i < actionListCount; i++)
+            {
+                var action = actionList[i];
+                actionList[i] = default;
+                action.Invoke();
+            }
+
+            {
+                bool lockTaken = false;
+                try
+                {
+                    gate.Enter(ref lockTaken);
+                    dequing = false;
+
+                    var swapTempActionList = actionList;
+
+                    actionListCount = waitingListCount;
+                    actionList = waitingList;
+
+                    waitingListCount = 0;
+                    waitingList = swapTempActionList;
+                }
+                finally
+                {
+                    if (lockTaken) gate.Exit(false);
+                }
+            }
+        }
+
+        [StructLayout(LayoutKind.Auto)]
+        readonly struct Callback
+        {
+            readonly SendOrPostCallback callback;
+            readonly object state;
+
+            public Callback(SendOrPostCallback callback, object state)
+            {
+                this.callback = callback;
+                this.state = state;
+            }
+
+            public void Invoke()
+            {
+                try
+                {
+                    callback(state);
+                }
+                catch (Exception ex)
+                {
+                    UnityEngine.Debug.LogException(ex);
+                }
+            }
+        }
+    }
+}