mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-16 16:10:06 +00:00
4812365660
The valid_nanoseconds () static inline function has been introduced to check if nanoseconds value is in the correct range - greater or equal to zero and less than 1000000000. The explicit #include <time.h> has been added to files where it was missing. The __syscall_slong_t type for ns has been used to avoid issues on x32. Tested with: - scripts/build-many-glibcs.py - make PARALLELMFLAGS="-j12" && make PARALLELMFLAGS="-j12" xcheck on x86_64
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/* High-resolution sleep with the specified clock.
|
|
Copyright (C) 2000-2019 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 <assert.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <sysdep-cancel.h>
|
|
#include <shlib-compat.h>
|
|
|
|
/* This implementation assumes that these is only a `nanosleep' system
|
|
call. So we have to remap all other activities. */
|
|
int
|
|
__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
|
|
struct timespec *rem)
|
|
{
|
|
struct timespec now;
|
|
|
|
if (! valid_nanoseconds (req->tv_nsec))
|
|
return EINVAL;
|
|
|
|
if (clock_id == CLOCK_THREAD_CPUTIME_ID)
|
|
return EINVAL; /* POSIX specifies EINVAL for this case. */
|
|
|
|
if (clock_id < CLOCK_REALTIME || clock_id > CLOCK_THREAD_CPUTIME_ID)
|
|
return EINVAL;
|
|
|
|
/* If we got an absolute time, remap it. */
|
|
if (flags == TIMER_ABSTIME)
|
|
{
|
|
long int nsec;
|
|
long int sec;
|
|
|
|
/* Make sure we use safe data types. */
|
|
assert (sizeof (sec) >= sizeof (now.tv_sec));
|
|
|
|
/* Get the current time for this clock. */
|
|
if (__clock_gettime (clock_id, &now) != 0)
|
|
return errno;
|
|
|
|
/* Compute the difference. */
|
|
nsec = req->tv_nsec - now.tv_nsec;
|
|
sec = req->tv_sec - now.tv_sec - (nsec < 0);
|
|
if (sec < 0)
|
|
/* The time has already elapsed. */
|
|
return 0;
|
|
|
|
now.tv_sec = sec;
|
|
now.tv_nsec = nsec + (nsec < 0 ? 1000000000 : 0);
|
|
|
|
/* From now on this is our time. */
|
|
req = &now;
|
|
|
|
/* Make sure we are not modifying the struct pointed to by REM. */
|
|
rem = NULL;
|
|
}
|
|
else if (flags != 0)
|
|
return EINVAL;
|
|
else if (clock_id != CLOCK_REALTIME)
|
|
/* Not supported. */
|
|
return ENOTSUP;
|
|
|
|
return __nanosleep (req, rem), 0 ? errno : 0;
|
|
}
|
|
|
|
versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17);
|
|
/* clock_nanosleep moved to libc in version 2.17;
|
|
old binaries may expect the symbol version it had in librt. */
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
|
|
strong_alias (__clock_nanosleep, __clock_nanosleep_2);
|
|
compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2);
|
|
#endif
|