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
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+/*
+ * 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.Threading;
+
+namespace QuantConnect.Util.RateLimit
+{
+    /// <summary>
+    /// Provides a CPU non-intensive means of waiting for more tokens to be available in <see cref="ITokenBucket"/>.
+    /// This strategy should be the most commonly used as it either sleeps or yields the currently executing thread,
+    /// allowing for other threads to execute while the current thread is blocked and waiting for new tokens to become
+    /// available in the bucket for consumption.
+    /// </summary>
+    public class ThreadSleepStrategy : ISleepStrategy
+    {
+        /// <summary>
+        /// Gets an instance of <see cref="ISleepStrategy"/> that yields the current thread
+        /// </summary>
+        public static readonly ISleepStrategy Yielding = new ThreadSleepStrategy(0);
+
+        /// <summary>
+        /// Gets an instance of <see cref="ISleepStrategy"/> that sleeps the current thread for
+        /// the specified number of milliseconds
+        /// </summary>
+        /// <param name="milliseconds">The duration of time to sleep, in milliseconds</param>
+        public static ISleepStrategy Sleeping(int milliseconds) => new ThreadSleepStrategy(milliseconds);
+
+        private readonly int _milliseconds;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ThreadSleepStrategy"/> using the specified
+        /// number of <paramref name="milliseconds"/> for each <see cref="Sleep"/> invocation.
+        /// </summary>
+        /// <param name="milliseconds">The duration of time to sleep, in milliseconds</param>
+        public ThreadSleepStrategy(int milliseconds)
+        {
+            _milliseconds = milliseconds;
+        }
+
+        /// <summary>
+        /// Sleeps the current thread using the initialized number of milliseconds
+        /// </summary>
+        public void Sleep()
+        {
+            Thread.Sleep(_milliseconds);
+        }
+    }
+}