aca-tasks/MonitorExample/producer.cpp

#include "producer.h"

//---------------------------------------
template<typename T> QSemaphore Producer<T>::numProducts;
template<typename T> Monitor<T> * Producer<T>::mon;
template<> int (*Producer<int>::produce)(int) = NULL;
//---------------------------------------

template<typename T> void Producer<T>::initClass(int numP, Monitor<T> *m, T(*prod)(int)) {
    mon = m;
    numProducts.release(numP);
    produce = prod;
}
//---------------------------------------

//Semaphore with Number of Resources -> create N Resources
//produce item -> get spot in queue -> put item into second queue
//activate consumers
template<typename T>
void Producer<T>::run() {
    while (numProducts.tryAcquire()) {	// While not all numProducts items are produced:
        T item = (*produce)(ID);			//   Produce one item
        T* aux = mon->canPut();			//   Get place for item in emptySpotsQ
        *aux = item;					//   Put item into emptySpotsQ
        mon->donePutting(aux);			//   Give info to consumer threads
    }
}
//---------------------------------------