QSharedMemory lock/unlock fails after 16252 attempts on Symbian

Trying to implement inter process communication to application with QSharedMemory. It seemed that QSharedMemory::lock() starts failing after certain period of time. Finally figured out that lock starts to fail after certain amount of calls to lock().

Provided test app calls lock/unlock in a loop. App fails after 16252th attempt to lock()/unlock() QSharedMemory segment.
QSharedMemory::error = 6
QSharedMemory::errorString() ="unable to lock"

After application is exited, following is printed to QT creators application output:
"QMutex: mutex init failure: Resource temporarily unavailable"