Patent ID: 8316172

Claim:
A computer program product for facilitating processing of queues of a processing environment, the computer program product comprising: a storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising; determining that a queue of the processing environment has transitioned from a no replies pending state to a reply pending state, wherein the queue is indirectly accessible to user programs, and wherein the no replies pending state is a state in which the queue is empty, and the reply pending state is a state in which the queue is not empty; enabling the queue for interruption, the enabling comprising employing a process adjunct processor queue (PQAP) instruction to enable the queue for interruption, wherein the PQAP instruction employs general registers 0 , 1 and 2 for input, and general register 1 for output; and initiating, by a processor, an interrupt for the queue, wherein the initiating is based on enabling the queue and determining that the queue has transitioned from the no replies pending state to the reply pending state, wherein the interrupt is initiated based on the queue transitioning from an empty state to a non-empty state, and the interrupt is not initiated based on the queue not transitioning from the empty state to the non-empty state.