diff options
| -rw-r--r-- | ChangeLog | 14 | ||||
| -rwxr-xr-x | math/gen-libm-test.pl | 8 | ||||
| -rw-r--r-- | sysdeps/unix/clock_settime.c | 92 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/clock_settime.c | 73 |
4 files changed, 140 insertions, 47 deletions
@@ -1,3 +1,17 @@ +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. + 2006-06-23 Paul Eggert <eggert@cs.ucla.edu> [BZ #2841] diff --git a/math/gen-libm-test.pl b/math/gen-libm-test.pl index a63f62a1cb..0b0b8ca19f 100755 --- a/math/gen-libm-test.pl +++ b/math/gen-libm-test.pl @@ -558,9 +558,11 @@ sub parse_ulps { sub clean_up_number { my ($number) = @_; - # Remove trailing zeros - $number =~ s/0+$//; - $number =~ s/\.$//; + # Remove trailing zeros after the decimal point + if ($number =~ /\./) { + $number =~ s/0+$//; + $number =~ s/\.$//; + } return $number; } diff --git a/sysdeps/unix/clock_settime.c b/sysdeps/unix/clock_settime.c index 0194999b36..a93be6349b 100644 --- a/sysdeps/unix/clock_settime.c +++ b/sysdeps/unix/clock_settime.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. +/* Copyright (C) 1999-2004, 2006 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 @@ -36,6 +36,43 @@ extern void __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset) #endif +#if HP_TIMING_AVAIL +static int +hp_timing_settime (clockid_t clock_id, const struct timespec *tp) +{ + hp_timing_t tsc; + hp_timing_t usertime; + + /* First thing is to get the current time. */ + HP_TIMING_NOW (tsc); + + if (__builtin_expect (freq == 0, 0)) + { + /* This can only happen if we haven't initialized the `freq' + variable yet. Do this now. We don't have to protect this + code against multiple execution since all of them should lead + to the same result. */ + freq = __get_clockfreq (); + if (__builtin_expect (freq == 0, 0)) + /* Something went wrong. */ + return -1; + } + + /* Convert the user-provided time into CPU ticks. */ + usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull; + + /* Determine the offset and use it as the new base value. */ + if (clock_id == CLOCK_PROCESS_CPUTIME_ID + || __pthread_clock_settime == NULL) + GL(dl_cpuclock_offset) = tsc - usertime; + else + __pthread_clock_settime (clock_id, tsc - usertime); + + return 0; +} +#endif + + /* Set CLOCK to value TP. */ int clock_settime (clockid_t clock_id, const struct timespec *tp) @@ -70,55 +107,22 @@ clock_settime (clockid_t clock_id, const struct timespec *tp) #endif default: -#if HP_TIMING_AVAIL - if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1)) - != CLOCK_THREAD_CPUTIME_ID) +#ifdef SYSDEP_SETTIME_CPU + SYSDEP_SETTIME_CPU; #endif +#ifndef HANDLED_CPUTIME +# if HP_TIMING_AVAIL + if (CPUCLOCK_WHICH (clock_id) == CLOCK_PROCESS_CPUTIME_ID + || CPUCLOCK_WHICH (clock_id) == CLOCK_THREAD_CPUTIME_ID) + retval = hp_timing_settime (clock_id, tp); + else +# endif { __set_errno (EINVAL); retval = -1; - break; } - -#if HP_TIMING_AVAIL - /* FALLTHROUGH. */ - case CLOCK_PROCESS_CPUTIME_ID: - { - hp_timing_t tsc; - hp_timing_t usertime; - - /* First thing is to get the current time. */ - HP_TIMING_NOW (tsc); - - if (__builtin_expect (freq == 0, 0)) - { - /* This can only happen if we haven't initialized the `freq' - variable yet. Do this now. We don't have to protect this - code against multiple execution since all of them should - lead to the same result. */ - freq = __get_clockfreq (); - if (__builtin_expect (freq == 0, 0)) - { - /* Something went wrong. */ - retval = -1; - break; - } - } - - /* Convert the user-provided time into CPU ticks. */ - usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull; - - /* Determine the offset and use it as the new base value. */ - if (clock_id == CLOCK_PROCESS_CPUTIME_ID - || __pthread_clock_settime == NULL) - GL(dl_cpuclock_offset) = tsc - usertime; - else - __pthread_clock_settime (clock_id, tsc - usertime); - - retval = 0; - } - break; #endif + break; } return retval; diff --git a/sysdeps/unix/sysv/linux/clock_settime.c b/sysdeps/unix/sysv/linux/clock_settime.c index 31ba0225fb..731b7be7b8 100644 --- a/sysdeps/unix/sysv/linux/clock_settime.c +++ b/sysdeps/unix/sysv/linux/clock_settime.c @@ -16,10 +16,65 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <errno.h> #include <sysdep.h> +#include "kernel-posix-cpu-timers.h" #include <kernel-features.h> +#ifndef HAVE_CLOCK_GETTIME_VSYSCALL +# undef INTERNAL_VSYSCALL +# define INTERNAL_VSYSCALL INTERNAL_SYSCALL +# undef INLINE_VSYSCALL +# define INLINE_VSYSCALL INLINE_SYSCALL +#else +# include <bits/libc-vdso.h> +#endif + +#if __ASSUME_POSIX_CPU_TIMERS <= 0 && defined __NR_clock_settime +extern int __libc_missing_posix_timers attribute_hidden; +extern int __libc_missing_posix_cpu_timers attribute_hidden; + +static int +maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp) +{ + int e = EINVAL; + + if (!__libc_missing_posix_cpu_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_VSYSCALL (clock_settime, err, 2, clock_id, tp); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + return 0; + + e = INTERNAL_SYSCALL_ERRNO (r, err); +# ifndef __ASSUME_POSIX_TIMERS + if (e == ENOSYS) + { + __libc_missing_posix_timers = 1; + __libc_missing_posix_cpu_timers = 1; + e = EINVAL; + } + else +# endif + { + if (e == EINVAL) + { + /* Check whether the kernel supports CPU clocks at all. + If not, record it for the future. */ + r = INTERNAL_VSYSCALL (clock_getres, err, 2, + MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + NULL); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + __libc_missing_posix_cpu_timers = 1; + } + } + } + + return e; +} +#endif + #ifdef __ASSUME_POSIX_TIMERS /* This means the REALTIME clock is definitely supported in the @@ -73,4 +128,22 @@ extern int __libc_missing_posix_timers attribute_hidden; # define HANDLED_REALTIME 1 #endif +#if __ASSUME_POSIX_CPU_TIMERS > 0 +# define HANDLED_CPUTIME 1 +# define SYSDEP_SETTIME_CPU \ + retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp) +#elif defined __NR_clock_settime +# define SYSDEP_SETTIME_CPU \ + retval = maybe_syscall_settime_cpu (clock_id, tp); \ + if (retval == 0) \ + break; \ + if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ + { \ + __set_errno (retval); \ + retval = -1; \ + break; \ + } \ + do { } while (0) +#endif + #include <sysdeps/unix/clock_settime.c> |