lock.h

来自「C++封装的视频采集代码」· C头文件 代码 · 共 51 行

#ifndef INC_SYSLIB_LOCK_H
#define INC_SYSLIB_LOCK_H

#include "oxsemi_sem.h"

namespace oxsemi
{
namespace syslib
{

    /**
     *  class to lock a semaphore in a scoped fashion; does somewhat
     *  replicate scoped_lock, but it is a bit simpler
     */
    class Lock
    {
    public:
        explicit Lock(oxsemi_sem& semaphore);

        ~Lock();

        void Take();

        void Give();

    private:
        bool locked_;
        oxsemi_sem& semaphore_;
    };

    inline void Lock::Take()
    {
        if (!locked_)
        {
            semaphore_.take();
            locked_ = true;
        }
    }

    inline void Lock::Give()
    {
        if (locked_)
        {
            semaphore_.give();
            locked_ = false;
        }
    }
};
};
#endif