QSemaphore: 1 Producer, 3 Consumers

[Daedalus]

Hi,

the basic problem I was facing is described here

As my work progressed, I faced the need to link 1 producer thread to 3 consumer-threads derived from the same class.

In my Widget Class, the semaphore and buffer are declared as followed (based on the Semaphore example and a single consumer), which worked:

QStringList threadBuffer[300];
 
    QSemaphore *freeListSlots(300);
    QSemaphore *usedListSlots;
 
    Importer *importerThread;
    Converter *converterThread1;
    Converter *converterThread2;
    Converter *converterThread3;

QStringList threadBuffer[300];

    QSemaphore *freeListSlots(300);
    QSemaphore *usedListSlots;

    Importer *importerThread;
    Converter *converterThread1;
    Converter *converterThread2;
    Converter *converterThread3;

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My idea was, to let thread1 work on buffer[0] to buffer[99], thread2 on buffer[100] to buffer[199] and so on. The thread, that has no accessible data, should block until new data arrives.

My "emergency plan" is, to use a different semaphore for each thread and provide a pointer to it in the consumer-constructor, then acquire and release based on the actual buffer-position. But if there was a nicer way, I'd prefer the alternative

Greets,
Daedalus