Stopping a thread that tries to acquire a QSystemSemaphore
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Hi there,
I'm using QSystemSemaphore for interprocess-communication. Two processes shall acquire the systemsemaphore by turns.
The flow of my application is as follows:
-ProcessA creates the QSystemSemaphore with key "x" and acquires it.
-ProcessB has a thread that creates the QSystemSemaphore with key "x". Since I'm using Windows, the QSystemSemaphore is not created but the already existing one is used.
-the thread of ProcessB tries to acquire the QSystemSemaphore and blocks, until ProcessA releases the QSystemSemaphore.
-ProcessA tries to acquire the QSystemSemaphore and blocks, until the thread of ProcessB releases the QSystemSemaphore.
-the thread of ProcessB tries to acquire the QSystemSemaphore and blocks, until ProcessA releases the QSystemSemaphore.
-...Everything works fine, but when I want to stop the thread, my application crashes. I can't figure out a way, to stop the thread from running, since the acquire-method blocks.
The relevant parts of my code are:
@
//the method 'stopWorking' should stop the sharedMemoryLayer from grasping the QSystemSemaphore
void Application::stopWorking() {if (thread->isRunning()) { //the sharedMemoryLayer runs within the thread 'thread'. I moved it there using 'moveToThread'
thread->quit();
thread->wait();
}
}
@My question is:
Is it possbible to stop that thread? If yes, how?
Completly deleting it and creating a new object is absolutly acceptable, but even this crashed my application.Greetings and thanks in advance
Christian