I’m working with threads in C++/Qt, each one to establish and mantain a QTcpSocket connection.
The problem is that when a disconnection from network comes, those threads must reconnect in a certain order. That’s already working, but I have another problem: I need to know into each thread if only current thread has been disconnected, or all of them have been disconnected.
The first idea I had was to pass every thread a reference to a class where I would be able to store each thread status and check everyone else’s.
But then I had an easier idea, and I would like to know if it would work or if it impossible: use Qt’s slots and signals.
So, every thread I have comes from the same class, but passing different data to the Ctor. So the idea would be to create a slot and a signal inside that class, connect them and emit the signal passing an ID. Then, every thread’s slot would be launched… or I may be completely wrong and the only slot launched would be the one from the very same thread which emited the signal.
Is this possible or not?
Signal and slot connections are done in run time, i.e. you are connecting specific instances of a class. You cannot emit a signal and “broadcast” it to every instance of your class. Signals between different threads is possible, but maintaining them could be a bit of a hassle (It’s all explained pretty well in the documentation).
If I were you, I’d probably look into QSemaphore or QSharedMemory.