diff --git a/src/corelib/thread/qmutex.cpp b/src/corelib/thread/qmutex.cpp index 002a9cc7bc..3269ee3ae8 100644 --- a/src/corelib/thread/qmutex.cpp +++ b/src/corelib/thread/qmutex.cpp @@ -563,7 +563,28 @@ const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = { }; typedef QFreeList FreeList; -Q_GLOBAL_STATIC(FreeList, freelist); +// We cannot use Q_GLOBAL_STATIC because it uses QMutex +#if defined(Q_COMPILER_THREADSAFE_STATICS) +FreeList *freelist() +{ + static FreeList list; + return &list; +} +#else +FreeList *freelist() +{ + static QAtomicPointer list; + FreeList *local = list.loadAcquire(); + if (!local) { + local = new FreeList; + if (!list.testAndSetRelease(0, local)) { + delete local; + local = list.loadAcquire(); + } + } + return local; +} +#endif } QMutexPrivate *QMutexPrivate::allocate()