chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
@@ -0,0 +1,107 @@
+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+using System;
+using System.Threading;
+
+namespace QuantConnect.Util
+{
+    /// <summary>
+    /// Provides extension methods to make working with the <see cref="ReaderWriterLockSlim"/> class easier
+    /// </summary>
+    public static class ReaderWriterLockSlimExtensions
+    {
+        /// <summary>
+        /// Opens the read lock
+        /// </summary>
+        /// <param name="readerWriterLockSlim">The lock to open for read</param>
+        /// <returns>A disposable reference which will release the lock upon disposal</returns>
+        public static IDisposable Read(this ReaderWriterLockSlim readerWriterLockSlim)
+        {
+            return new ReaderLockToken(readerWriterLockSlim);
+        }
+
+        /// <summary>
+        /// Opens the write lock
+        /// </summary>
+        /// <param name="readerWriterLockSlim">The lock to open for write</param>
+        /// <returns>A disposale reference which will release thelock upon disposal</returns>
+        public static IDisposable Write(this ReaderWriterLockSlim readerWriterLockSlim)
+        {
+            return new WriteLockToken(readerWriterLockSlim);
+        }
+
+        private sealed class ReaderLockToken : ReaderWriterLockSlimToken
+        {
+            public ReaderLockToken(ReaderWriterLockSlim readerWriterLockSlim)
+                : base(readerWriterLockSlim)
+            {
+            }
+
+            protected override void EnterLock(ReaderWriterLockSlim readerWriterLockSlim)
+            {
+                readerWriterLockSlim.EnterReadLock();
+            }
+
+            protected override void ExitLock(ReaderWriterLockSlim readerWriterLockSlim)
+            {
+                readerWriterLockSlim.ExitReadLock();
+            }
+        }
+
+        private sealed class WriteLockToken : ReaderWriterLockSlimToken
+        {
+            public WriteLockToken(ReaderWriterLockSlim readerWriterLockSlim)
+                : base(readerWriterLockSlim)
+            {
+            }
+
+            protected override void EnterLock(ReaderWriterLockSlim readerWriterLockSlim)
+            {
+                readerWriterLockSlim.EnterWriteLock();
+            }
+
+            protected override void ExitLock(ReaderWriterLockSlim readerWriterLockSlim)
+            {
+                readerWriterLockSlim.ExitWriteLock();
+            }
+        }
+
+        private abstract class ReaderWriterLockSlimToken : IDisposable
+        {
+            private ReaderWriterLockSlim _readerWriterLockSlim;
+
+            public ReaderWriterLockSlimToken(ReaderWriterLockSlim readerWriterLockSlim)
+            {
+                _readerWriterLockSlim = readerWriterLockSlim;
+                // ReSharper disable once DoNotCallOverridableMethodsInConstructor -- we control the subclasses, this is fine
+                EnterLock(_readerWriterLockSlim);
+            }
+
+            protected abstract void EnterLock(ReaderWriterLockSlim readerWriterLockSlim);
+            protected abstract void ExitLock(ReaderWriterLockSlim readerWriterLockSlim);
+
+            public void Dispose()
+            {
+                if (_readerWriterLockSlim != null)
+                {
+                    ExitLock(_readerWriterLockSlim);
+                    _readerWriterLockSlim = null;
+                }
+            }
+        }
+    }
+}