1. A method of sharing memory performed in a computer system having multiple processors and memory coupled to the processors, the method comprising: a) obtaining a storage request including a semaphore address at a processing cache; b) setting a semaphore variable in a processing cache at the semaphore address; c) invoking an operating system trap-call such that i) if the storage request includes a wait-on-semaphore instruction, requiring the operating system trap-call to wait on a processing queue, and ii) if the storage request includes a signal-on-semaphore instruction, requiring the operating system trap-call to signal on a processing queue.