c++ - boost 互斥锁的作用域解锁

Question

我的代码如下所示:

boost::mutex::scoped_lock lck(mQueueMutex);

while (true)
{
    ...

    // unlock the queue while we exec the job
    lck.unlock();

    ...

    // lock the queue again
    lck.lock();
}

我想做这样的事情:

boost::mutex::scoped_lock lock(mQueueMutex);

while (true)
{
    ...

    // unlock the queue while we exec the job
    {
        boost::mutex::scoped_unlock unlock(lock);

        ...
    }

}

我几乎可以肯定我以前见过这个……或者至少讨论过它，但我找不到它。

Answer 1

您正在寻找 Boost.Threads Reverse Lock :

reverse_lock reverse the operations of a lock: it provide for RAII-style, that unlocks the lock at construction time and lock it at destruction time. In addition, it transfer ownership temporarily, so that the mutex can not be locked using the Lock.