QMutexLocker locker(&mutex); 会导致阻塞吗
时间: 2024-05-25 12:17:24 浏览: 20
&mutex);
QMutexLocker is a class in the Qt library that provides a convenient way to lock a mutex for the duration of a scope. The constructor of the QMutexLocker class takes a pointer to a QMutex object, which is a mutual exclusion (mutex) object that ensures that only one thread can access a shared resource at a time. When the QMutexLocker object is constructed, it locks the mutex, and when it goes out of scope (either by reaching the end of the block or by throwing an exception), it automatically unlocks the mutex.
In the code snippet provided, the QMutexLocker object named "locker" is created with the "mutex" object as its argument. This means that the "mutex" object is locked for the duration of the block of code that follows. This ensures that any shared resources accessed within the block are protected from concurrent access by other threads. Once the block of code is finished executing, the "locker" object is destroyed, and the "mutex" object is automatically unlocked.
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