/* * mq_notify.c - notify process that a message is available. */ #include <errno.h> #include <stddef.h> #include <sys/syscall.h> #include <mqueue.h> #ifdef __NR_mq_notify #define __NR___syscall_mq_notify __NR_mq_notify static __inline__ _syscall2(int, __syscall_mq_notify, int, mqdes, const void *, notification); /* Register notification upon message arrival to an empty message queue */ int mq_notify(mqd_t mqdes, const struct sigevent *notification) { /* We don't support SIGEV_THREAD notification yet */ if (notification != NULL && notification->sigev_notify == SIGEV_THREAD) { __set_errno(ENOSYS); return -1; } return __syscall_mq_notify(mqdes, notification); } #endif