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* rt/tst-cpuclock1.c: New file.
* 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.
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Roland McGrath
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/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version | ||
Copyright (C) 2000,2001,2002,2003,2004 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; see the file COPYING.LIB. If not, | ||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
Boston, MA 02111-1307, USA. */ | ||
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#include <errno.h> | ||
#include <pthreadP.h> | ||
#include <sys/time.h> | ||
#include <tls.h> | ||
#include "kernel-features.h" | ||
#include "kernel-posix-cpu-timers.h" | ||
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#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 | ||
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int | ||
pthread_getcpuclockid (threadid, clockid) | ||
pthread_t threadid; | ||
clockid_t *clockid; | ||
{ | ||
struct pthread *pd = (struct pthread *) threadid; | ||
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/* Make sure the descriptor is valid. */ | ||
if (INVALID_TD_P (pd)) | ||
/* Not a valid thread handle. */ | ||
return ESRCH; | ||
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#ifdef __NR_clock_getres | ||
/* The clockid_t value is a simple computation from the TID. | ||
But we do a clock_getres call to validate it if we aren't | ||
yet sure we have the kernel support. */ | ||
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const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED); | ||
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# if !(__ASSUME_POSIX_CPU_TIMERS > 0) | ||
# if !(__ASSUME_POSIX_TIMERS > 0) | ||
if (__libc_missing_posix_timers && !__libc_missing_posix_cpu_timers) | ||
__libc_missing_posix_cpu_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 | ||
{ | ||
*clockid = tidclock; | ||
return 0; | ||
} | ||
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# 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 | ||
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#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 (pd->tid >= 1 << (8 * sizeof (*clockid) - CLOCK_IDFIELD_SIZE)) | ||
return ERANGE; | ||
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/* Store the number. */ | ||
*clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE); | ||
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return 0; | ||
#else | ||
/* We don't have a timer for that. */ | ||
return ENOENT; | ||
#endif | ||
} |
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