glibc/sysdeps/unix/sysv/linux/mq_notify.c

44 lines
1.3 KiB
C

/* Copyright (C) 2004-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <mqueue.h>
#include <stddef.h>
#include <sysdep.h>
#ifdef __NR_mq_notify
/* Register notification upon message arrival to an empty message queue
MQDES. */
int
mq_notify (mqd_t mqdes, const struct sigevent *notification)
{
/* mq_notify which handles SIGEV_THREAD is included in the thread
add-on. */
if (notification != NULL
&& notification->sigev_notify == SIGEV_THREAD)
{
__set_errno (ENOSYS);
return -1;
}
return INLINE_SYSCALL (mq_notify, 2, mqdes, notification);
}
#else
# include <rt/mq_notify.c>
#endif