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- /* Copyright (C) 2004, 2005 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/>. */
- #ifndef _MQUEUE_H
- #define _MQUEUE_H 1
- #include <features.h>
- #if defined __UCLIBC_HAS_REALTIME__ || \
- defined __UCLIBC_HAS_ADVANCED_REALTIME__
- #include <sys/types.h>
- #include <fcntl.h>
- #define __need_sigevent_t
- #include <bits/siginfo.h>
- #define __need_timespec
- #include <time.h>
- /* Get the definition of mqd_t and struct mq_attr. */
- #include <bits/mqueue.h>
- #endif
- __BEGIN_DECLS
- #if defined __UCLIBC_HAS_REALTIME__
- /* Establish connection between a process and a message queue NAME and
- return message queue descriptor or (mqd_t) -1 on error. OFLAG determines
- the type of access used. If O_CREAT is on OFLAG, the third argument is
- taken as a `mode_t', the mode of the created message queue, and the fourth
- argument is taken as `struct mq_attr *', pointer to message queue
- attributes. If the fourth argument is NULL, default attributes are
- used. */
- extern mqd_t mq_open (const char *__name, int __oflag, ...) __THROW;
- /* Removes the association between message queue descriptor MQDES and its
- message queue. */
- extern int mq_close (mqd_t __mqdes) __THROW;
- /* Query status and attributes of message queue MQDES. */
- extern int mq_getattr (mqd_t __mqdes, struct mq_attr *__mqstat) __THROW;
- /* Set attributes associated with message queue MQDES and if OMQSTAT is
- not NULL also query its old attributes. */
- extern int mq_setattr (mqd_t __mqdes,
- const struct mq_attr *__restrict __mqstat,
- struct mq_attr *__restrict __omqstat) __THROW;
- /* Remove message queue named NAME. */
- extern int mq_unlink (const char *__name) __THROW;
- /* Register notification issued upon message arrival to an empty
- message queue MQDES. */
- extern int mq_notify (mqd_t __mqdes, const struct sigevent *__notification)
- __THROW;
- /* Receive the oldest from highest priority messages in message queue
- MQDES. */
- extern ssize_t mq_receive (mqd_t __mqdes, char *__msg_ptr, size_t __msg_len,
- unsigned int *__msg_prio);
- /* Add message pointed by MSG_PTR to message queue MQDES. */
- extern int mq_send (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len,
- unsigned int __msg_prio);
- #endif
- #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
- /* Receive the oldest from highest priority messages in message queue
- MQDES, stop waiting if ABS_TIMEOUT expires. */
- extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr,
- size_t __msg_len,
- unsigned int *__restrict __msg_prio,
- const struct timespec *__restrict __abs_timeout);
- /* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
- on full message queue if ABS_TIMEOUT expires. */
- extern int mq_timedsend (mqd_t __mqdes, const char *__msg_ptr,
- size_t __msg_len, unsigned int __msg_prio,
- const struct timespec *__abs_timeout);
- #endif
- __END_DECLS
- #endif /* mqueue.h */
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