Initial commit: Client Doc docs Server Tools

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-07-10 10:24:29 +08:00
commit 7e35d8da31
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+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated July 28, 2023. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2026, Esoteric Software LLC
+ *
+ * Integration of the Spine Runtimes into software or otherwise creating
+ * derivative works of the Spine Runtimes is permitted under the terms and
+ * conditions of Section 2 of the Spine Editor License Agreement:
+ * http://esotericsoftware.com/spine-editor-license
+ *
+ * Otherwise, it is permitted to integrate the Spine Runtimes into software or
+ * otherwise create derivative works of the Spine Runtimes (collectively,
+ * "Products"), provided that each user of the Products must obtain their own
+ * Spine Editor license and redistribution of the Products in any form must
+ * include this license and copyright notice.
+ *
+ * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
+ * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE
+ * SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+using System;
+using System.Threading;
+
+/// <summary>
+/// A generic lock-free single-producer single-consumer queue.
+/// </summary>
+public class LockFreeSPSCQueue<T> {
+	private readonly int capacity;
+	private readonly T[] circularBuffer;
+	private int headIndex;
+	private int tailIndex;
+
+	public LockFreeSPSCQueue (int allocatedCapacity) {
+		capacity = allocatedCapacity;
+		circularBuffer = new T[allocatedCapacity];
+		headIndex = tailIndex = 0;
+	}
+
+	/// <summary>Enqueues an item if there is space available.</summary>
+	/// <returns>True if the item was successfully enqueued, false otherwise.</returns>
+	public bool Enqueue (T item) {
+		int head = Thread.VolatileRead(ref headIndex);
+		int nextHead = (head + 1) % capacity;
+
+		if (nextHead == Thread.VolatileRead(ref tailIndex))
+			return false; // queue is full
+
+		circularBuffer[head] = item;
+		Thread.VolatileWrite(ref headIndex, nextHead);
+		return true;
+	}
+
+	/// <summary>
+	/// Dequeues an item unless the queue is empty.
+	/// </summary>
+	/// <param name="item">The dequeued item, or the default element if empty.</param>
+	/// <returns>True if the item was successfully dequeued, false otherwise.</returns>
+	public bool Dequeue (out T item) {
+		int tail = Thread.VolatileRead(ref tailIndex);
+
+		if (tail == Thread.VolatileRead(ref headIndex)) {
+			item = default(T); // queue is empty
+			return false;
+		}
+
+		item = circularBuffer[tail];
+		int nextTail = (tail + 1) % capacity;
+		Thread.VolatileWrite(ref tailIndex, nextTail);
+		return true;
+	}
+}