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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #if defined __UCLIBC_HAS_REALTIME__ || \
24 defined __UCLIBC_HAS_ADVANCED_REALTIME__
25 #include <sys/types.h>
27 #define __need_sigevent_t
28 #include <bits/siginfo.h>
29 #define __need_timespec
31 /* Get the definition of mqd_t and struct mq_attr. */
32 #include <bits/mqueue.h>
36 #if defined __UCLIBC_HAS_REALTIME__
37 /* Establish connection between a process and a message queue NAME and
38 return message queue descriptor or (mqd_t) -1 on error. OFLAG determines
39 the type of access used. If O_CREAT is on OFLAG, the third argument is
40 taken as a `mode_t', the mode of the created message queue, and the fourth
41 argument is taken as `struct mq_attr *', pointer to message queue
42 attributes. If the fourth argument is NULL, default attributes are
44 extern mqd_t
mq_open (const char *__name
, int __oflag
, ...) __THROW
;
46 /* Removes the association between message queue descriptor MQDES and its
48 extern int mq_close (mqd_t __mqdes
) __THROW
;
50 /* Query status and attributes of message queue MQDES. */
51 extern int mq_getattr (mqd_t __mqdes
, struct mq_attr
*__mqstat
) __THROW
;
53 /* Set attributes associated with message queue MQDES and if OMQSTAT is
54 not NULL also query its old attributes. */
55 extern int mq_setattr (mqd_t __mqdes
,
56 const struct mq_attr
*__restrict __mqstat
,
57 struct mq_attr
*__restrict __omqstat
) __THROW
;
59 /* Remove message queue named NAME. */
60 extern int mq_unlink (const char *__name
) __THROW
;
62 /* Register notification issued upon message arrival to an empty
63 message queue MQDES. */
64 extern int mq_notify (mqd_t __mqdes
, const struct sigevent
*__notification
)
67 /* Receive the oldest from highest priority messages in message queue
69 extern ssize_t
mq_receive (mqd_t __mqdes
, char *__msg_ptr
, size_t __msg_len
,
70 unsigned int *__msg_prio
);
72 /* Add message pointed by MSG_PTR to message queue MQDES. */
73 extern int mq_send (mqd_t __mqdes
, const char *__msg_ptr
, size_t __msg_len
,
74 unsigned int __msg_prio
);
77 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
78 /* Receive the oldest from highest priority messages in message queue
79 MQDES, stop waiting if ABS_TIMEOUT expires. */
80 extern ssize_t
mq_timedreceive (mqd_t __mqdes
, char *__restrict __msg_ptr
,
82 unsigned int *__restrict __msg_prio
,
83 const struct timespec
*__restrict __abs_timeout
);
85 /* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
86 on full message queue if ABS_TIMEOUT expires. */
87 extern int mq_timedsend (mqd_t __mqdes
, const char *__msg_ptr
,
88 size_t __msg_len
, unsigned int __msg_prio
,
89 const struct timespec
*__abs_timeout
);