1/* Receive a message from a message queue with a timeout. Linux version.
2 Copyright (C) 2017-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <mqueue.h>
20#include <sysdep-cancel.h>
21
22/* Receive the oldest from highest priority messages in message queue
23 MQDES, stop waiting if ABS_TIMEOUT expires. */
24ssize_t
25__mq_timedreceive_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
26 unsigned int *__restrict msg_prio,
27 const struct __timespec64 *__restrict abs_timeout)
28{
29#ifdef __ASSUME_TIME64_SYSCALLS
30# ifndef __NR_mq_timedreceive_time64
31# define __NR_mq_timedreceive_time64 __NR_mq_timedreceive
32# endif
33 return SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len,
34 msg_prio, abs_timeout);
35#else
36 int ret = SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len,
37 msg_prio, abs_timeout);
38 if (ret == 0 || errno != ENOSYS)
39 return ret;
40
41 struct timespec ts32;
42 if (abs_timeout != NULL)
43 {
44 if (! in_time_t_range (abs_timeout->tv_sec))
45 {
46 __set_errno (EOVERFLOW);
47 return -1;
48 }
49
50 ts32 = valid_timespec64_to_timespec (*abs_timeout);
51 }
52
53 return SYSCALL_CANCEL (mq_timedreceive, mqdes, msg_ptr, msg_len, msg_prio,
54 abs_timeout != NULL ? &ts32 : NULL);
55#endif
56}
57
58#if __TIMESIZE != 64
59librt_hidden_def (__mq_timedreceive_time64)
60
61ssize_t
62__mq_timedreceive (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
63 unsigned int *__restrict msg_prio,
64 const struct timespec *__restrict abs_timeout)
65{
66 struct __timespec64 ts64;
67 if (abs_timeout != NULL)
68 ts64 = valid_timespec_to_timespec64 (*abs_timeout);
69
70 return __mq_timedreceive_time64 (mqdes, msg_ptr, msg_len, msg_prio,
71 abs_timeout != NULL ? &ts64 : NULL);
72}
73#endif
74
75hidden_def (__mq_timedreceive)
76weak_alias (__mq_timedreceive, mq_timedreceive)
77hidden_weak (mq_timedreceive)
78