Compatibility Members for QMutex

The following members of class QMutexare part of the Qt compatibility layer. We advise against using them in new code.

Public Functions

Member Function Documentation

QMutex::QMutex(bool recursive)

Use the constructor that takes a RecursionMode parameter instead.

bool QMutex::locked()

Returns true if the mutex is locked by another thread; otherwise returns false.

It is generally a bad idea to use this function, because code that uses it has a race condition. Use tryLock() and unlock() instead.

For example, if you have code like

bool isLocked = mutex.locked();

you can rewrite it as

bool isLocked = true;
if (mutex.tryLock()) {
    mutex.unlock();
    isLocked = false;
}