60fce589e8
for CLOCK_THREAD_CPUTIME_ID, not ENOTSUP. Use SYSDEP_NANOSLEEP handler before validating CLOCK_ID value. * rt/tst-timer4.c (TEST_CLOCK, TEST_CLOCK_NANOSLEEP): New macros. Use them throughout in place of CLOCK_REALTIME and nanosleep. (do_test) [TEST_CLOCK_MISSING]: Call this macro and if it returns non-null, punt the test with a message using the string returned. * rt/tst-timer5.c: New file. * rt/Makefile (tests): Add it.
102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/* High-resolution sleep with the specified clock.
|
|
Copyright (C) 2000, 2001, 2003, 2004 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <hp-timing.h>
|
|
#include <sysdep-cancel.h>
|
|
|
|
#if HP_TIMING_AVAIL
|
|
# define CPUCLOCK_P(clock) \
|
|
((clock) == CLOCK_PROCESS_CPUTIME_ID \
|
|
|| ((clock) & ((1 << CLOCK_IDFIELD_SIZE) - 1)) == CLOCK_THREAD_CPUTIME_ID)
|
|
#else
|
|
# define CPUCLOCK_P(clock) 0
|
|
#endif
|
|
|
|
#ifndef INVALID_CLOCK_P
|
|
# define INVALID_CLOCK_P(cl) \
|
|
((cl) < CLOCK_REALTIME || (cl) > CLOCK_THREAD_CPUTIME_ID)
|
|
#endif
|
|
|
|
|
|
/* 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 (__builtin_expect (req->tv_nsec, 0) < 0
|
|
|| __builtin_expect (req->tv_nsec, 0) >= 1000000000)
|
|
return EINVAL;
|
|
|
|
if (clock_id == CLOCK_THREAD_CPUTIME_ID)
|
|
return EINVAL; /* POSIX specifies EINVAL for this case. */
|
|
|
|
#ifdef SYSDEP_NANOSLEEP
|
|
SYSDEP_NANOSLEEP;
|
|
#endif
|
|
|
|
if (CPUCLOCK_P (clock_id))
|
|
return ENOTSUP;
|
|
|
|
if (INVALID_CLOCK_P (clock_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 (__builtin_expect (clock_gettime (clock_id, &now), 0) != 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 (__builtin_expect (flags, 0) != 0)
|
|
return EINVAL;
|
|
else if (clock_id != CLOCK_REALTIME)
|
|
/* Not supported. */
|
|
return ENOTSUP;
|
|
|
|
return __builtin_expect (nanosleep (req, rem), 0) ? errno : 0;
|
|
}
|