glibc/sysdeps/unix/sysv/linux/nanosleep.c
Lukasz Majewski 7ed2b6921f nanosleep: Pass NULL when rem == NULL on ports with __TIMESIZE != 64
On ports with __TIMESIZE != 64 the remaining time argument always receives
pointer to struct __timespec64 instance. This is the different behavior
when compared to 64 bit versions of clock_nanosleep and nanosleep
functions, which receive NULL.

To avoid any potential issues, we also pass NULL when *rem pointer is
NULL.

Reported-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2020-11-14 22:12:40 +01:00

51 lines
1.5 KiB
C

/* High-resolution sleep.
Copyright (C) 2020 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 <time.h>
#include <errno.h>
int
__nanosleep64 (const struct __timespec64 *req, struct __timespec64 *rem)
{
int ret = __clock_nanosleep_time64 (CLOCK_REALTIME, 0, req, rem);
if (ret != 0)
{
__set_errno (ret);
return -1;
}
return 0;
}
#if __TIMESIZE != 64
libc_hidden_def (__nanosleep64)
int
__nanosleep (const struct timespec *req, struct timespec *rem)
{
struct __timespec64 treq64, trem64;
treq64 = valid_timespec_to_timespec64 (*req);
int ret = __nanosleep64 (&treq64, rem != NULL ? &trem64 : NULL);
if (ret != 0 && errno == EINTR && rem != NULL)
*rem = valid_timespec64_to_timespec (trem64);
return ret;
}
#endif
libc_hidden_def (__nanosleep)
weak_alias (__nanosleep, nanosleep)