1/* Receive a message from a message queue with a timeout. Linux version.
2 Copyright (C) 2017-2021 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#include <shlib-compat.h>
22
23/* Receive the oldest from highest priority messages in message queue
24 MQDES, stop waiting if ABS_TIMEOUT expires. */
25ssize_t
26___mq_timedreceive_time64 (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
27 unsigned int *__restrict msg_prio,
28 const struct __timespec64 *__restrict abs_timeout)
29{
30#ifndef __NR_mq_timedreceive_time64
31# define __NR_mq_timedreceive_time64 __NR_mq_timedreceive
32#endif
33
34#ifdef __ASSUME_TIME64_SYSCALLS
35 return SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len,
36 msg_prio, abs_timeout);
37#else
38 bool need_time64 = abs_timeout != NULL
39 && !in_time_t_range (abs_timeout->tv_sec);
40 if (need_time64)
41 {
42 int r = SYSCALL_CANCEL (mq_timedreceive_time64, mqdes, msg_ptr, msg_len,
43 msg_prio, abs_timeout);
44 if (r == 0 || errno != ENOSYS)
45 return r;
46 __set_errno (EOVERFLOW);
47 return -1;
48 }
49
50 struct timespec ts32, *pts32 = NULL;
51 if (abs_timeout != NULL)
52 {
53 ts32 = valid_timespec64_to_timespec (*abs_timeout);
54 pts32 = &ts32;
55 }
56
57 return SYSCALL_CANCEL (mq_timedreceive, mqdes, msg_ptr, msg_len, msg_prio,
58 pts32);
59#endif
60}
61
62#if __TIMESIZE == 64
63versioned_symbol (libc, ___mq_timedreceive_time64, mq_timedreceive, GLIBC_2_34);
64libc_hidden_ver (___mq_timedreceive_time64, __mq_timedreceive)
65# ifndef SHARED
66strong_alias (___mq_timedreceive_time64, __mq_timedreceive)
67# endif
68# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_4, GLIBC_2_34)
69compat_symbol (librt, ___mq_timedreceive_time64, mq_timedreceive, GLIBC_2_3_4);
70# endif
71
72#else /* __TIMESIZE != 64 */
73libc_hidden_ver (___mq_timedreceive_time64, __mq_timedreceive_time64)
74versioned_symbol (libc, ___mq_timedreceive_time64, __mq_timedreceive_time64,
75 GLIBC_2_34);
76
77ssize_t
78___mq_timedreceive (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
79 unsigned int *__restrict msg_prio,
80 const struct timespec *__restrict abs_timeout)
81{
82 struct __timespec64 ts64;
83 if (abs_timeout != NULL)
84 ts64 = valid_timespec_to_timespec64 (*abs_timeout);
85
86 return __mq_timedreceive_time64 (mqdes, msg_ptr, msg_len, msg_prio,
87 abs_timeout != NULL ? &ts64 : NULL);
88}
89versioned_symbol (libc, ___mq_timedreceive, mq_timedreceive, GLIBC_2_34);
90libc_hidden_ver (___mq_timedreceive, __mq_timedreceive)
91# ifndef SHARED
92strong_alias (___mq_timedreceive, __mq_timedreceive)
93# endif
94# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_4, GLIBC_2_34)
95compat_symbol (librt, ___mq_timedreceive, mq_timedreceive, GLIBC_2_3_4);
96# endif
97
98#endif /* __TIMESIZE != 64 */
99