Fix -Wgnu-designator clang warnings
[uclibc-ng.git] / include / mqueue.h
blobfbfd807b2846862eec932b4241c2746d6ef6e68a
1 /* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #ifndef _MQUEUE_H
19 #define _MQUEUE_H 1
21 #include <features.h>
22 #if defined __UCLIBC_HAS_REALTIME__ || \
23 defined __UCLIBC_HAS_ADVANCED_REALTIME__
24 #include <sys/types.h>
25 #include <fcntl.h>
26 #define __need_sigevent_t
27 #include <bits/siginfo.h>
28 #define __need_timespec
29 #include <time.h>
30 /* Get the definition of mqd_t and struct mq_attr. */
31 #include <bits/mqueue.h>
32 #endif
34 __BEGIN_DECLS
35 #if defined __UCLIBC_HAS_REALTIME__
36 /* Establish connection between a process and a message queue NAME and
37 return message queue descriptor or (mqd_t) -1 on error. OFLAG determines
38 the type of access used. If O_CREAT is on OFLAG, the third argument is
39 taken as a `mode_t', the mode of the created message queue, and the fourth
40 argument is taken as `struct mq_attr *', pointer to message queue
41 attributes. If the fourth argument is NULL, default attributes are
42 used. */
43 extern mqd_t mq_open (const char *__name, int __oflag, ...) __THROW;
45 /* Removes the association between message queue descriptor MQDES and its
46 message queue. */
47 extern int mq_close (mqd_t __mqdes) __THROW;
49 /* Query status and attributes of message queue MQDES. */
50 extern int mq_getattr (mqd_t __mqdes, struct mq_attr *__mqstat) __THROW;
52 /* Set attributes associated with message queue MQDES and if OMQSTAT is
53 not NULL also query its old attributes. */
54 extern int mq_setattr (mqd_t __mqdes,
55 const struct mq_attr *__restrict __mqstat,
56 struct mq_attr *__restrict __omqstat) __THROW;
58 /* Remove message queue named NAME. */
59 extern int mq_unlink (const char *__name) __THROW;
61 /* Register notification issued upon message arrival to an empty
62 message queue MQDES. */
63 extern int mq_notify (mqd_t __mqdes, const struct sigevent *__notification)
64 __THROW;
66 /* Receive the oldest from highest priority messages in message queue
67 MQDES. */
68 extern ssize_t mq_receive (mqd_t __mqdes, char *__msg_ptr, size_t __msg_len,
69 unsigned int *__msg_prio);
71 /* Add message pointed by MSG_PTR to message queue MQDES. */
72 extern int mq_send (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len,
73 unsigned int __msg_prio);
74 #endif
76 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
77 /* Receive the oldest from highest priority messages in message queue
78 MQDES, stop waiting if ABS_TIMEOUT expires. */
79 extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr,
80 size_t __msg_len,
81 unsigned int *__restrict __msg_prio,
82 const struct timespec *__restrict __abs_timeout);
84 /* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
85 on full message queue if ABS_TIMEOUT expires. */
86 extern int mq_timedsend (mqd_t __mqdes, const char *__msg_ptr,
87 size_t __msg_len, unsigned int __msg_prio,
88 const struct timespec *__abs_timeout);
89 #endif
91 __END_DECLS
93 #endif /* mqueue.h */