84060bad82
* rt/tst-cpuclock2.c: New file. * rt/tst-cputimer1.c: New file. * rt/tst-cputimer2.c: New file. * rt/tst-cputimer3.c: New file. * rt/Makefile (tests): Add them. * sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h: New file. * sysdeps/unix/sysv/linux/clock_getcpuclockid.c: New file. * sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c (HAS_CPUCLOCK): New macro. (clock_getcpuclockid): Function removed. #include the new linux file to define it instead. * sysdeps/unix/clock_gettime.c [HP_TIMING_AVAIL] (hp_timing_gettime): New function, broken out of ... (clock_gettime) [HP_TIMING_AVAIL]: ... here. Call it. (realtime_gettime): New function, broken out of ... (clock_gettime) [! HANDLED_REALTIME]: ... here. Call it. (clock_gettime) [SYSDEP_GETTIME_CPU]: Use new macro in default case. * sysdeps/unix/sysv/linux/clock_gettime.c (SYSCALL_GETTIME): New macro. (SYSDEP_GETTIME_CPUTIME): New macro. (SYSDEP_GETTIME): Use both. [! __ASSUME_POSIX_TIMERS] (maybe_syscall_gettime): New function, broken out of ... (SYSDEP_GETTIME): ... here. Use it. [__NR_clock_gettime] (HANDLED_CPUTIME): Define it. (SYSDEP_GETTIME_CPUTIME): New macro. Handle CPU timers by trying kernel support and falling back to hp-timing code. * sysdeps/posix/clock_getres.c [HP_TIMING_AVAIL] (hp_timing_getres): New function, broken out of ... (clock_getres) [HP_TIMING_AVAIL]: ... here. Call it. (realtime_getres): New function, broken out of ... (clock_getres) [! HANDLED_REALTIME]: ... here. Call it. (clock_getres) [SYSDEP_GETRES_CPU]: Use new macro in default case. * sysdeps/unix/sysv/linux/clock_getres.c (SYSCALL_GETRES): New macro. (SYSDEP_GETRES_CPUTIME): New macro. (SYSDEP_GETRES): Use both. [! __ASSUME_POSIX_TIMERS] (maybe_syscall_getres): New function, broken out of ... (SYSDEP_GETRES): ... here. Use it. [__NR_clock_getres] (HANDLED_CPUTIME): Define it. (SYSDEP_GETRES_CPUTIME): New macro. Handle CPU timers by trying kernel support and falling back to hp-timing code. * sysdeps/unix/sysv/linux/clock_nanosleep.c: Handle CLOCK_PROCESS_CPUTIME_ID and CLOCK_PROCESS_THREAD_ID specially, translating to the kernel clockid_t for our own process/thread clock.
117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version
|
|
Copyright (C) 2000, 2001, 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; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
#include <internals.h>
|
|
#include "kernel-features.h"
|
|
#include "posix-cpu-timers.h"
|
|
|
|
|
|
#if !(__ASSUME_POSIX_CPU_TIMERS > 0)
|
|
int __libc_missing_posix_cpu_timers attribute_hidden;
|
|
#endif
|
|
#if !(__ASSUME_POSIX_TIMERS > 0)
|
|
int __libc_missing_posix_timers attribute_hidden;
|
|
#endif
|
|
|
|
int
|
|
pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id)
|
|
{
|
|
#ifdef __NR_clock_getres
|
|
pthread_handle handle = thread_handle(thread_id);
|
|
int pid;
|
|
|
|
__pthread_lock (&handle->h_lock, NULL);
|
|
if (nonexisting_handle (handle, thread_id))
|
|
{
|
|
__pthread_unlock (&handle->h_lock);
|
|
return ESRCH;
|
|
}
|
|
pid = handle->h_descr->p_pid;
|
|
__pthread_unlock (&handle->h_lock);
|
|
|
|
/* The clockid_t value is a simple computation from the PID.
|
|
But we do a clock_getres call to validate it if we aren't
|
|
yet sure we have the kernel support. */
|
|
|
|
const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED);
|
|
|
|
# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
|
|
# if !(__ASSUME_POSIX_TIMERS > 0)
|
|
if (__libc_missing_posix_timers && !__libc_missing_posix_cpu_timers)
|
|
__libc_missing_cpu_posix_timers = 1;
|
|
# endif
|
|
if (!__libc_missing_posix_cpu_timers)
|
|
{
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
int r = INTERNAL_SYSCALL (clock_getres, err, 2, tidclock, NULL);
|
|
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
|
|
# endif
|
|
{
|
|
*clock_id = pidclock;
|
|
return 0;
|
|
}
|
|
|
|
# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
|
|
# if !(__ASSUME_POSIX_TIMERS > 0)
|
|
if (INTERNAL_SYSCALL_ERRNO (r, err) == ENOSYS)
|
|
{
|
|
/* The kernel doesn't support these calls at all. */
|
|
__libc_missing_posix_timers = 1;
|
|
__libc_missing_posix_cpu_timers = 1;
|
|
}
|
|
else
|
|
# endif
|
|
if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
|
|
{
|
|
/* The kernel doesn't support these clocks at all. */
|
|
__libc_missing_posix_cpu_timers = 1;
|
|
}
|
|
else
|
|
return INTERNAL_SYSCALL_ERRNO (r, err);
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CLOCK_THREAD_CPUTIME_ID
|
|
/* We need to store the thread ID in the CLOCKID variable together
|
|
with a number identifying the clock. We reserve the low 3 bits
|
|
for the clock ID and the rest for the thread ID. This is
|
|
problematic if the thread ID is too large. But 29 bits should be
|
|
fine.
|
|
|
|
If some day more clock IDs are needed the ID part can be
|
|
enlarged. The IDs are entirely internal. */
|
|
if (2 * PTHREAD_THREADS_MAX
|
|
>= 1 << (8 * sizeof (*clock_id) - CLOCK_IDFIELD_SIZE))
|
|
return ERANGE;
|
|
|
|
/* Store the number. */
|
|
*clock_id = CLOCK_THREAD_CPUTIME_ID | (thread_id << CLOCK_IDFIELD_SIZE);
|
|
|
|
return 0;
|
|
#else
|
|
/* We don't have a timer for that. */
|
|
return ENOENT;
|
|
#endif
|
|
}
|