Acquirelock insert an item to q SignalEmpty Releaselock Item GetItemQueue q Item item Acquire lock while q is empty Wait lock Empty remove an item ID: 165527
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wait(empty); remove an item; if (buffer was full) Acquire(lock); insert an item to q; Signal(Empty); Release(lock); } Item GetItem(Queue q) { Item item; Acquire( lock ); while ( q is empty ) Wait( lock, Empty); remove an item; Release( lock ); return item; }