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2006-06-08 Joseph Myers <jsm28@gcc.gnu.org> [BZ #2832] * math/gen-libm-test.pl (clean_up_number): Do not remove trailing 0s from integers. 2006-08-13 Ulrich Drepper <drepper@redhat.com> [BZ #2987] * sysdeps/unix/sysv/linux/clock_settime.c: Add code to use syscall for CPU clocks. * sysdeps/unix/clock_settime.c: Add support for platform-specific setting of CPU clocks.
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Ulrich Drepper
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14
ChangeLog
14
ChangeLog
@ -1,3 +1,17 @@
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2006-06-08 Joseph Myers <jsm28@gcc.gnu.org>
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[BZ #2832]
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* math/gen-libm-test.pl (clean_up_number): Do not remove trailing
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0s from integers.
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2006-08-13 Ulrich Drepper <drepper@redhat.com>
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[BZ #2987]
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* sysdeps/unix/sysv/linux/clock_settime.c: Add code to use syscall
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for CPU clocks.
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* sysdeps/unix/clock_settime.c: Add support for platform-specific
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setting of CPU clocks.
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2006-06-23 Paul Eggert <eggert@cs.ucla.edu>
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[BZ #2841]
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@ -558,9 +558,11 @@ sub parse_ulps {
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sub clean_up_number {
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my ($number) = @_;
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# Remove trailing zeros
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$number =~ s/0+$//;
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$number =~ s/\.$//;
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# Remove trailing zeros after the decimal point
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if ($number =~ /\./) {
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$number =~ s/0+$//;
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$number =~ s/\.$//;
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}
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return $number;
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}
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@ -1,4 +1,4 @@
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/* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
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/* Copyright (C) 1999-2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -36,6 +36,43 @@ extern void __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
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#endif
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#if HP_TIMING_AVAIL
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static int
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hp_timing_settime (clockid_t clock_id, const struct timespec *tp)
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{
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hp_timing_t tsc;
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hp_timing_t usertime;
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/* First thing is to get the current time. */
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HP_TIMING_NOW (tsc);
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if (__builtin_expect (freq == 0, 0))
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{
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/* This can only happen if we haven't initialized the `freq'
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variable yet. Do this now. We don't have to protect this
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code against multiple execution since all of them should lead
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to the same result. */
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freq = __get_clockfreq ();
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if (__builtin_expect (freq == 0, 0))
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/* Something went wrong. */
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return -1;
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}
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/* Convert the user-provided time into CPU ticks. */
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usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;
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/* Determine the offset and use it as the new base value. */
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if (clock_id == CLOCK_PROCESS_CPUTIME_ID
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|| __pthread_clock_settime == NULL)
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GL(dl_cpuclock_offset) = tsc - usertime;
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else
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__pthread_clock_settime (clock_id, tsc - usertime);
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return 0;
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}
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#endif
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/* Set CLOCK to value TP. */
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int
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clock_settime (clockid_t clock_id, const struct timespec *tp)
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@ -70,55 +107,22 @@ clock_settime (clockid_t clock_id, const struct timespec *tp)
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#endif
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default:
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#if HP_TIMING_AVAIL
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if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
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!= CLOCK_THREAD_CPUTIME_ID)
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#ifdef SYSDEP_SETTIME_CPU
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SYSDEP_SETTIME_CPU;
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#endif
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#ifndef HANDLED_CPUTIME
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# if HP_TIMING_AVAIL
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if (CPUCLOCK_WHICH (clock_id) == CLOCK_PROCESS_CPUTIME_ID
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|| CPUCLOCK_WHICH (clock_id) == CLOCK_THREAD_CPUTIME_ID)
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retval = hp_timing_settime (clock_id, tp);
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else
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# endif
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{
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__set_errno (EINVAL);
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retval = -1;
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break;
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}
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#if HP_TIMING_AVAIL
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/* FALLTHROUGH. */
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case CLOCK_PROCESS_CPUTIME_ID:
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{
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hp_timing_t tsc;
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hp_timing_t usertime;
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/* First thing is to get the current time. */
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HP_TIMING_NOW (tsc);
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if (__builtin_expect (freq == 0, 0))
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{
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/* This can only happen if we haven't initialized the `freq'
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variable yet. Do this now. We don't have to protect this
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code against multiple execution since all of them should
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lead to the same result. */
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freq = __get_clockfreq ();
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if (__builtin_expect (freq == 0, 0))
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{
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/* Something went wrong. */
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retval = -1;
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break;
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}
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}
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/* Convert the user-provided time into CPU ticks. */
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usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;
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/* Determine the offset and use it as the new base value. */
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if (clock_id == CLOCK_PROCESS_CPUTIME_ID
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|| __pthread_clock_settime == NULL)
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GL(dl_cpuclock_offset) = tsc - usertime;
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else
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__pthread_clock_settime (clock_id, tsc - usertime);
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retval = 0;
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}
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break;
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#endif
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break;
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}
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return retval;
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@ -16,10 +16,65 @@
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <sysdep.h>
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#include "kernel-posix-cpu-timers.h"
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#include <kernel-features.h>
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#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
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# undef INTERNAL_VSYSCALL
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# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
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# undef INLINE_VSYSCALL
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# define INLINE_VSYSCALL INLINE_SYSCALL
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#else
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# include <bits/libc-vdso.h>
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#endif
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#if __ASSUME_POSIX_CPU_TIMERS <= 0 && defined __NR_clock_settime
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extern int __libc_missing_posix_timers attribute_hidden;
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extern int __libc_missing_posix_cpu_timers attribute_hidden;
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static int
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maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp)
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{
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int e = EINVAL;
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if (!__libc_missing_posix_cpu_timers)
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{
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INTERNAL_SYSCALL_DECL (err);
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int r = INTERNAL_VSYSCALL (clock_settime, err, 2, clock_id, tp);
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if (!INTERNAL_SYSCALL_ERROR_P (r, err))
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return 0;
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e = INTERNAL_SYSCALL_ERRNO (r, err);
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# ifndef __ASSUME_POSIX_TIMERS
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if (e == ENOSYS)
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{
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__libc_missing_posix_timers = 1;
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__libc_missing_posix_cpu_timers = 1;
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e = EINVAL;
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}
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else
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# endif
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{
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if (e == EINVAL)
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{
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/* Check whether the kernel supports CPU clocks at all.
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If not, record it for the future. */
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r = INTERNAL_VSYSCALL (clock_getres, err, 2,
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MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
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NULL);
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if (INTERNAL_SYSCALL_ERROR_P (r, err))
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__libc_missing_posix_cpu_timers = 1;
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}
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}
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}
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return e;
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}
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#endif
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#ifdef __ASSUME_POSIX_TIMERS
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/* This means the REALTIME clock is definitely supported in the
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@ -73,4 +128,22 @@ extern int __libc_missing_posix_timers attribute_hidden;
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# define HANDLED_REALTIME 1
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#endif
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#if __ASSUME_POSIX_CPU_TIMERS > 0
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# define HANDLED_CPUTIME 1
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# define SYSDEP_SETTIME_CPU \
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retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp)
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#elif defined __NR_clock_settime
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# define SYSDEP_SETTIME_CPU \
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retval = maybe_syscall_settime_cpu (clock_id, tp); \
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if (retval == 0) \
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break; \
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if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \
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{ \
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__set_errno (retval); \
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retval = -1; \
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break; \
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} \
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do { } while (0)
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#endif
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#include <sysdeps/unix/clock_settime.c>
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