OpenThreads.ReverseScopedLock

OpenThreads.ReverseScopedLock是OpenSceneGraph中的一个线程锁类，它允许线程在离开作用域时自动释放锁。

目录

• 类定义
• 成员函数
• 示例

类定义

class ReverseScopedLock : public OpenThreads::ScopedLock< Mutex >
{
public:
    ReverseScopedLock( Mutex& mutex );
    virtual ~ReverseScopedLock();
};

成员函数

ReverseScopedLock( Mutex& mutex )

构造函数，传入一个Mutex对象，初始化一个ReverseScopedLock对象，会自动加锁该Mutex。

virtual ~ReverseScopedLock()

析构函数，会自动析构该对象，释放锁。

示例

#include <osgViewer/Viewer>

#include <OpenThreads/Mutex>
#include <OpenThreads/ReverseScopedLock>

OpenThreads::Mutex mutex;

void* threadFunc(void*)
{
    while(1)
    {
        OpenThreads::ReverseScopedLock lock(mutex);
        // do something
        // 当线程执行完这里的代码时，ReverseScopedLock对象会自动析构，释放锁
    }
}

int main(int argc, char** argv)
{
    // 主线程
    pthread_t thread;
    pthread_create(&thread, NULL, threadFunc, NULL);
    pthread_detach(thread);

    osgViewer::Viewer viewer;
    while (!viewer.done())
    {
        // do something
    }

    pthread_exit(0);
    return 0;
}