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Document performance of QMutex

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Change-Id: I4de2fd5ba717975b5de98ffe7ca6348afbed1b2f
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
This commit is contained in:
Olivier Goffart 2015-11-10 17:52:28 +01:00 committed by Olivier Goffart (Woboq GmbH)
parent 1de3fe0f9b
commit 45be405408
1 changed files with 7 additions and 0 deletions
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7
src/corelib/thread/qmutex.cpp
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@ -139,6 +139,11 @@ public:
lock calls unlock(). A non-blocking alternative to lock() is lock calls unlock(). A non-blocking alternative to lock() is
tryLock(). tryLock().
QMutex is optimized to be fast in the non-contended case. A non-recursive
QMutex will not allocate memory if there is no contention on that mutex.
It is constructed and destroyed with almost no overhead,
which means it is fine to have many mutexes as part of other classes.
\sa QMutexLocker, QReadWriteLock, QSemaphore, QWaitCondition \sa QMutexLocker, QReadWriteLock, QSemaphore, QWaitCondition
*/ */
@ -165,6 +170,8 @@ public:
a thread may only lock a mutex once. The default is a thread may only lock a mutex once. The default is
QMutex::NonRecursive. QMutex::NonRecursive.
Recursive mutexes are slower and take more memory than non-recursive ones.
\sa lock(), unlock() \sa lock(), unlock()
*/ */
QMutex::QMutex(RecursionMode mode) QMutex::QMutex(RecursionMode mode)