IPC_NOWAIT 337 ext/sysvmsg/sysvmsg.c realflags |= IPC_NOWAIT; IPC_NOWAIT 455 ext/sysvmsg/sysvmsg.c result = msgsnd(mq->id, messagebuffer, message_len, blocking ? 0 : IPC_NOWAIT); IPC_NOWAIT 325 ext/sysvsem/sysvsem.c sop.sem_flg = SEM_UNDO | (nowait ? IPC_NOWAIT : 0);