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// Each producer enqueues `np` items where np=n/nProducers except for producer 0
        long item = 0;
        long items_produced = 0;
        long value_produced = 0;  
        while(items_produced < np) {
            bool ret = production_buffer.enqueue(item);  //item includes value and type
            if(ret == true) {
                if(production_buffer.itemCount() == 1){
                    // The queue is no longer empty
                    // Signal all consumers indicating queue is not empty
                }
                value_produced += item;
                items_produced++;
                item++;
                // also update item count and value for item type produced
            }
            else {
                // production_buffer is full, so block on conditional variable waiting for consumer to signal.

            }
        }

        // After production is completed:
        // Update the number of producers that are currently active.
        --active_producer_count;
        // The producer that was last active (can be determined using `active_producer_count`) will keep signalling the consumers until all consumers have finished (can be determined using `active_consumer_count`).