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y2038: Convert thrd_sleep to support 64 bit time

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The thrd_sleep function has been converted to support 64 bit time.
It was also necessary to provide Linux specific copy of it to avoid
problems on i686-gnu (i.e. HURD) port, which is not providing
clock_nanosleep() supporting 64 bit time.

The thrd_sleep is a wrapper on POSIX threads to provide C11 standard
threads interface. It directly calls __clock_nanosleep64().

Build tests:
./src/scripts/build-many-glibcs.py glibcs

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Lukasz Majewski
2020-11-12 00:24:48 +01:00
parent b0c0ad4d54
commit eb60eda2b9
2 changed files with 60 additions and 0 deletions
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4
sysdeps/unix/sysv/linux/thrd_priv.h
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@ -21,6 +21,7 @@
#if __TIMESIZE == 64 #if __TIMESIZE == 64
# define __cnd_timedwait64 __cnd_timedwait # define __cnd_timedwait64 __cnd_timedwait
# define __mtx_timedlock64 __mtx_timedlock # define __mtx_timedlock64 __mtx_timedlock
# define __thrd_sleep64 __thrd_sleep
#else #else
extern int __cnd_timedwait64 (cnd_t *restrict cond, mtx_t *restrict mutex, extern int __cnd_timedwait64 (cnd_t *restrict cond, mtx_t *restrict mutex,
const struct __timespec64 *restrict time_point); const struct __timespec64 *restrict time_point);
@ -28,4 +29,7 @@ libpthread_hidden_proto (__cnd_timedwait64)
extern int __mtx_timedlock64 (mtx_t *restrict mutex, extern int __mtx_timedlock64 (mtx_t *restrict mutex,
const struct __timespec64 *restrict time_point); const struct __timespec64 *restrict time_point);
libpthread_hidden_proto (__mtx_timedlock64) libpthread_hidden_proto (__mtx_timedlock64)
extern int __thrd_sleep64 (const struct __timespec64 *time_point,
struct __timespec64 *remaining);
libpthread_hidden_proto (__thrd_sleep64)
#endif #endif

56
sysdeps/unix/sysv/linux/thrd_sleep.c Normal file
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@ -0,0 +1,56 @@
/* C11 threads thread sleep implementation - Linux variant.
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 <sysdep-cancel.h>
#include "thrd_priv.h"
int
__thrd_sleep64 (const struct __timespec64 *time_point,
struct __timespec64 *remaining)
{
int ret = __clock_nanosleep_time64 (CLOCK_REALTIME, 0, time_point,
remaining);
/* C11 states thrd_sleep function returns -1 if it has been interrupted
by a signal, or a negative value if it fails. */
switch (ret)
{
case 0: return 0;
case EINTR: return -1;
default: return -2;
}
}
#if __TIMESIZE != 64
libpthread_hidden_def (__thrd_sleep64)
int
__thrd_sleep (const struct timespec *time_point, struct timespec *remaining)
{
const struct __timespec64 treq64 = valid_timespec_to_timespec64 (*time_point);
struct __timespec64 trem64;
int ret = __thrd_sleep64 (&treq64, remaining != NULL ? &trem64 : NULL);
if (ret == -1 && remaining != NULL)
*remaining = valid_timespec64_to_timespec (trem64);
return ret;
}
#endif
weak_alias (__thrd_sleep, thrd_sleep)