mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-11 15:50:06 +00:00
96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/* Copyright (C) 2003, 2004, 2005, 2006 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <kernel-features.h>
|
|
#include "kernel-posix-cpu-timers.h"
|
|
|
|
|
|
#ifdef __ASSUME_POSIX_TIMERS
|
|
/* We can simply use the syscall. The CPU clocks are not supported
|
|
with this function. */
|
|
int
|
|
clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
|
|
struct timespec *rem)
|
|
{
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
int r;
|
|
|
|
if (clock_id == CLOCK_THREAD_CPUTIME_ID)
|
|
return EINVAL;
|
|
if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
|
|
clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
|
|
|
|
if (SINGLE_THREAD_P)
|
|
r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
|
|
else
|
|
{
|
|
int oldstate = LIBC_CANCEL_ASYNC ();
|
|
|
|
r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req,
|
|
rem);
|
|
|
|
LIBC_CANCEL_RESET (oldstate);
|
|
}
|
|
|
|
return (INTERNAL_SYSCALL_ERROR_P (r, err)
|
|
? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
|
|
}
|
|
|
|
#else
|
|
# ifdef __NR_clock_nanosleep
|
|
/* Is the syscall known to exist? */
|
|
extern int __libc_missing_posix_timers attribute_hidden;
|
|
|
|
/* The REALTIME and MONOTONIC clock might be available. Try the
|
|
syscall first. */
|
|
# define SYSDEP_NANOSLEEP \
|
|
if (!__libc_missing_posix_timers) \
|
|
{ \
|
|
clockid_t syscall_clockid; \
|
|
INTERNAL_SYSCALL_DECL (err); \
|
|
\
|
|
if (clock_id == CLOCK_THREAD_CPUTIME_ID) \
|
|
return EINVAL; \
|
|
if (clock_id == CLOCK_PROCESS_CPUTIME_ID) \
|
|
syscall_clockid = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); \
|
|
else \
|
|
syscall_clockid = clock_id; \
|
|
\
|
|
int oldstate = LIBC_CANCEL_ASYNC (); \
|
|
\
|
|
int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, \
|
|
syscall_clockid, flags, req, rem); \
|
|
\
|
|
LIBC_CANCEL_RESET (oldstate); \
|
|
\
|
|
if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \
|
|
return 0; \
|
|
\
|
|
if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS) \
|
|
return INTERNAL_SYSCALL_ERRNO (r, err); \
|
|
\
|
|
__libc_missing_posix_timers = 1; \
|
|
}
|
|
# endif
|
|
|
|
# include <sysdeps/unix/clock_nanosleep.c>
|
|
#endif
|