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a4ed0471d7
It was raised on libc-help [1] that some Linux kernel interfaces expect the libc to define __USE_TIME_BITS64 to indicate the time_t size for the kABI. Different than defined by the initial y2038 design document [2], the __USE_TIME_BITS64 is only defined for ABIs that support more than one time_t size (by defining the _TIME_BITS for each module). The 64 bit time_t redirects are now enabled using a different internal define (__USE_TIME64_REDIRECTS). There is no expected change in semantic or code generation. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and arm-linux-gnueabi [1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html [2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign Reviewed-by: DJ Delorie <dj@redhat.com>
120 lines
4.5 KiB
C
120 lines
4.5 KiB
C
/* Copyright (C) 2004-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _MQUEUE_H
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#define _MQUEUE_H 1
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#include <features.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <bits/types/sigevent_t.h>
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#include <bits/types/struct_timespec.h>
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/* Get the definition of mqd_t and struct mq_attr. */
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#include <bits/mqueue.h>
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__BEGIN_DECLS
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/* Establish connection between a process and a message queue NAME and
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return message queue descriptor or (mqd_t) -1 on error. OFLAG determines
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the type of access used. If O_CREAT is on OFLAG, the third argument is
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taken as a `mode_t', the mode of the created message queue, and the fourth
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argument is taken as `struct mq_attr *', pointer to message queue
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attributes. If the fourth argument is NULL, default attributes are
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used. */
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extern mqd_t mq_open (const char *__name, int __oflag, ...)
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__THROW __nonnull ((1));
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/* Removes the association between message queue descriptor MQDES and its
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message queue. */
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extern int mq_close (mqd_t __mqdes) __THROW;
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/* Query status and attributes of message queue MQDES. */
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extern int mq_getattr (mqd_t __mqdes, struct mq_attr *__mqstat)
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__THROW __nonnull ((2));
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/* Set attributes associated with message queue MQDES and if OMQSTAT is
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not NULL also query its old attributes. */
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extern int mq_setattr (mqd_t __mqdes,
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const struct mq_attr *__restrict __mqstat,
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struct mq_attr *__restrict __omqstat)
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__THROW __nonnull ((2));
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/* Remove message queue named NAME. */
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extern int mq_unlink (const char *__name) __THROW __nonnull ((1));
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/* Register notification issued upon message arrival to an empty
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message queue MQDES. */
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extern int mq_notify (mqd_t __mqdes, const struct sigevent *__notification)
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__THROW;
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/* Receive the oldest from highest priority messages in message queue
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MQDES. */
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extern ssize_t mq_receive (mqd_t __mqdes, char *__msg_ptr, size_t __msg_len,
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unsigned int *__msg_prio) __nonnull ((2));
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/* Add message pointed by MSG_PTR to message queue MQDES. */
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extern int mq_send (mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len,
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unsigned int __msg_prio) __nonnull ((2));
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#ifdef __USE_XOPEN2K
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# ifndef __USE_TIME64_REDIRECTS
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/* Receive the oldest from highest priority messages in message queue
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MQDES, stop waiting if ABS_TIMEOUT expires. */
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extern ssize_t mq_timedreceive (mqd_t __mqdes, char *__restrict __msg_ptr,
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size_t __msg_len,
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unsigned int *__restrict __msg_prio,
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const struct timespec *__restrict __abs_timeout)
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__nonnull ((2, 5));
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/* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
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on full message queue if ABS_TIMEOUT expires. */
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extern int mq_timedsend (mqd_t __mqdes, const char *__msg_ptr,
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size_t __msg_len, unsigned int __msg_prio,
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const struct timespec *__abs_timeout)
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__nonnull ((2, 5));
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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (mq_timedreceive, (mqd_t __mqdes,
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char *__restrict __msg_ptr,
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size_t __msg_len,
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unsigned int *__restrict __msg_prio,
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const struct timespec *__restrict __abs_timeout),
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__mq_timedreceive_time64)
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__nonnull ((2, 5));
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extern int __REDIRECT (mq_timedsend, (mqd_t __mqdes,
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const char *__msg_ptr, size_t __msg_len,
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unsigned int __msg_prio,
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const struct timespec *__abs_timeout),
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__mq_timedsend_time64)
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__nonnull ((2, 5));
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# else
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# define mq_timedreceive __mq_timedreceive_time64
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# define mq_timedsend __mq_timedsend_time64
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# endif
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# endif
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#endif
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/* Define some inlines helping to catch common problems. */
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#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
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# include <bits/mqueue2.h>
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#endif
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__END_DECLS
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#endif /* mqueue.h */
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