mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-11 11:50:06 +00:00
1faff27011
For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall if the provided timeout fits in a 32-bit one. The 64-bit usage should be rare since the timeout is a relative one. Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel (with and without --enable-kernel=5.1) and on x86_64-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* Send a message to a message queue with a timeout. Linux version.
|
|
Copyright (C) 2017-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <mqueue.h>
|
|
#include <sysdep-cancel.h>
|
|
|
|
/* Add message pointed by MSG_PTR to message queue MQDES, stop blocking
|
|
on full message queue if ABS_TIMEOUT expires. */
|
|
int
|
|
__mq_timedsend_time64 (mqd_t mqdes, const char *msg_ptr, size_t msg_len,
|
|
unsigned int msg_prio,
|
|
const struct __timespec64 *abs_timeout)
|
|
{
|
|
# ifndef __NR_mq_timedsend_time64
|
|
# define __NR_mq_timedsend_time64 __NR_mq_timedsend
|
|
# endif
|
|
|
|
#ifdef __ASSUME_TIME64_SYSCALLS
|
|
return SYSCALL_CANCEL (mq_timedsend_time64, mqdes, msg_ptr, msg_len,
|
|
msg_prio, abs_timeout);
|
|
#else
|
|
bool need_time64 = abs_timeout != NULL
|
|
&& !in_time_t_range (abs_timeout->tv_sec);
|
|
if (need_time64)
|
|
{
|
|
int r = SYSCALL_CANCEL (mq_timedsend_time64, mqdes, msg_ptr, msg_len,
|
|
msg_prio, abs_timeout);
|
|
if (r == 0 || errno != ENOSYS)
|
|
return r;
|
|
__set_errno (EOVERFLOW);
|
|
return -1;
|
|
}
|
|
|
|
struct timespec ts32, *pts32 = NULL;
|
|
if (abs_timeout != NULL)
|
|
{
|
|
ts32 = valid_timespec64_to_timespec (*abs_timeout);
|
|
pts32 = &ts32;
|
|
}
|
|
|
|
return SYSCALL_CANCEL (mq_timedsend, mqdes, msg_ptr, msg_len, msg_prio,
|
|
pts32);
|
|
#endif
|
|
}
|
|
|
|
#if __TIMESIZE != 64
|
|
librt_hidden_def (__mq_timedsend_time64)
|
|
|
|
int
|
|
__mq_timedsend (mqd_t mqdes, const char *msg_ptr, size_t msg_len,
|
|
unsigned int msg_prio, const struct timespec *abs_timeout)
|
|
{
|
|
struct __timespec64 ts64;
|
|
if (abs_timeout != NULL)
|
|
ts64 = valid_timespec_to_timespec64 (*abs_timeout);
|
|
|
|
return __mq_timedsend_time64 (mqdes, msg_ptr, msg_len, msg_prio,
|
|
abs_timeout != NULL ? &ts64 : NULL);
|
|
}
|
|
#endif
|
|
|
|
hidden_def (__mq_timedsend)
|
|
weak_alias (__mq_timedsend, mq_timedsend)
|
|
hidden_weak (mq_timedsend)
|