replace v6 with experimental v7 code

src/MpvNet.Windows/WPF/HandyControl/Tools/Interop/Handle/HandleCollector.cs

@@ -0,0 +1,131 @@
+// reference from https://referencesource.microsoft.com/#WindowsBase/Shared/MS/Win32/HandleCollector.cs,d0f99220d8e1b708
+
+using System.Runtime.InteropServices;
+
+namespace HandyControl.Tools.Interop
+{
+    internal static class HandleCollector
+    {
+        private static HandleType[] HandleTypes;
+        private static int HandleTypeCount;
+
+        private static readonly object HandleMutex = new object();
+
+        internal static IntPtr Add(IntPtr handle, int type)
+        {
+            HandleTypes[type - 1].Add();
+            return handle;
+        }
+
+        [System.Security.SecuritySafeCritical]
+        internal static SafeHandle Add(SafeHandle handle, int type)
+        {
+            HandleTypes[type - 1].Add();
+            return handle;
+        }
+
+        internal static void Add(int type)
+        {
+            HandleTypes[type - 1].Add();
+        }
+
+        internal static int RegisterType(string typeName, int expense, int initialThreshold)
+        {
+            lock (HandleMutex)
+            {
+                if (HandleTypeCount == 0 || HandleTypeCount == HandleTypes.Length)
+                {
+                    HandleType[] newTypes = new HandleType[HandleTypeCount + 10];
+                    if (HandleTypes != null)
+                    {
+                        Array.Copy(HandleTypes, 0, newTypes, 0, HandleTypeCount);
+                    }
+                    HandleTypes = newTypes;
+                }
+
+                HandleTypes[HandleTypeCount++] = new HandleType(expense, initialThreshold);
+                return HandleTypeCount;
+            }
+        }
+
+        internal static IntPtr Remove(IntPtr handle, int type)
+        {
+            HandleTypes[type - 1].Remove();
+            return handle;
+        }
+
+        [System.Security.SecuritySafeCritical]
+        internal static SafeHandle Remove(SafeHandle handle, int type)
+        {
+            HandleTypes[type - 1].Remove();
+            return handle;
+        }
+
+        internal static void Remove(int type)
+        {
+            HandleTypes[type - 1].Remove();
+        }
+
+        private class HandleType
+        {
+            private readonly int _initialThreshHold;
+            private int _threshHold;
+            private int _handleCount;
+            private readonly int _deltaPercent;
+
+            internal HandleType(int expense, int initialThreshHold)
+            {
+                _initialThreshHold = initialThreshHold;
+                _threshHold = initialThreshHold;
+                _deltaPercent = 100 - expense;
+            }
+
+            internal void Add()
+            {
+                lock (this)
+                {
+                    _handleCount++;
+                    var performCollect = NeedCollection();
+
+                    if (!performCollect)
+                    {
+                        return;
+                    }
+                }
+
+                GC.Collect();
+
+                var sleep = (100 - _deltaPercent) / 4;
+                System.Threading.Thread.Sleep(sleep);
+            }
+
+            private bool NeedCollection()
+            {
+
+                if (_handleCount > _threshHold)
+                {
+                    _threshHold = _handleCount + _handleCount * _deltaPercent / 100;
+                    return true;
+                }
+
+                var oldThreshHold = 100 * _threshHold / (100 + _deltaPercent);
+                if (oldThreshHold >= _initialThreshHold && _handleCount < (int) (oldThreshHold * .9F))
+                {
+                    _threshHold = oldThreshHold;
+                }
+
+                return false;
+            }
+
+            internal void Remove()
+            {
+                lock (this)
+                {
+                    _handleCount--;
+
+                    _handleCount = Math.Max(0, _handleCount);
+                }
+            }
+        }
+    }
+}