long mpiNotifyEventWait(MPINotify      notify,
                        MPIEventStatus *status,
                        MPIWait        timeout)

NotifyEventWait sets the contents of the structure pointed to by status, using the status of the first event in the internal FIFO event queue (maintained by a Notify object (notify)), and then removes the first event from the queue. If no event is available in the internal FIFO event queue, NotifyEventWait will wait for timeout milliseconds.