58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
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# ReadWriteLock
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**命名空间**: `XCEngine::Threading`
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**类型**: `class`
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**头文件**: `XCEngine/Threading/ReadWriteLock.h`
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**描述**: 读写锁实现，支持多个并发读取或单一写入，提高读多写少场景的并发性能。
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## 概述
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`ReadWriteLock` 实现了一个经典的读写锁。它允许多个线程同时持有读锁，但在有写锁时，所有读锁都必须释放，写锁为独占访问。这对于读操作远多于写操作的共享数据非常有效。
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## 公共方法
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### 读锁
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| 方法 | 描述 |
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|------|------|
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| [`ReadLock`](readlock.md) | 获取读锁（可重入，支持多个并发读者） |
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| [`ReadUnlock`](readunlock.md) | 释放读锁 |
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### 写锁
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| 方法 | 描述 |
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|------|------|
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| [`WriteLock`](writelock.md) | 获取写锁（独占，阻塞所有读者和写者） |
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| [`WriteUnlock`](writeunlock.md) | 释放写锁 |
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## 使用示例
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```cpp
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Threading::ReadWriteLock rwLock;
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Containers::HashMap<String, int> sharedMap;
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// 读操作（多个线程可同时读）
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int* ReadData(const String& key) {
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rwLock.ReadLock();
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int* value = sharedMap.Find(key);
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rwLock.ReadUnlock();
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return value;
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}
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// 写操作（独占）
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void WriteData(const String& key, int value) {
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rwLock.WriteLock();
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sharedMap.Insert(key, value);
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rwLock.WriteUnlock();
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}
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```
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## 相关文档
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- [Mutex](../mutex/mutex.md) - 互斥锁
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- [SpinLock](../spinlock/spinlock.md) - 自旋锁
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- [../threading/threading.md](../threading.md) - 模块总览
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