From 6689a1882be51506e254adbf088a61968604f498 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 11 Apr 2000 07:08:31 +0000 Subject: [PATCH] Update. 2000-04-10 Ulrich Drepper * Versions.def (librt): Add GLIBC_2.2. * rt/Makefile (librt-routines): Add get_clockfreq, clock_getcpuclockid, clock_getres, clock_gettime, clock_settime, timer_create, timer_delete, timer_getoverr, timer_gettime, and timer_settime. * rt/Versions [librt] (GLIBC_2.2): Add clock_getres, clock_gettime, clock_settime, timer_create, timer_delete, timer_getoverrun, timer_gettime, and timer_settime. * sysdeps/generic/clock_getcpuclockid.c: New file. * sysdeps/generic/get_clockfreq.c: New file. * sysdeps/unix/i386/clock_getcpuclockid.c: New file. * sysdeps/unix/sysv/linux/i386/get_clockfreq.c: New file. * sysdeps/mach/hurd/i386/bits/time.h: New file. * sysdeps/unix/i386/i586/clock_getres.c: New file. * sysdeps/unix/i386/i586/clock_gettime.c: New file. * sysdeps/unix/i386/i686/Implies: New file. * sysdpes/unix/sysv/linux/i386/bits/time.h: New file. * time/Makefile (routines): Move clock_getres, clock_gettime, clock_settime, timer_create, timer_delete, timer_getoverr, timer_gettime, and timer_settime to rt/Makefile. * time/Versions [libc] (GLIBC_2.2): Remove clock_getres, clock_gettime, clock_settime, timer_create, timer_delete, timer_getoverrun, timer_gettime, and timer_settime. * sysdeps/mach/hurd/bits/time.h: Drop K&R compatibility. Use __const__ and not const as attribute name. --- ChangeLog | 28 ++++++++++ Versions.def | 1 + rt/Makefile | 7 ++- rt/Versions | 8 +++ sysdeps/generic/clock_getcpuclockid.c | 27 ++++++++++ sysdeps/generic/get_clockfreq.c | 26 ++++++++++ sysdeps/mach/hurd/bits/time.h | 4 +- sysdeps/mach/hurd/i386/bits/time.h | 78 ++++++++++++++++++++++++++++ sysdeps/unix/i386/clock_getcpuclockid.c | 34 ++++++++++++ sysdeps/unix/i386/i586/clock_getres.c | 71 +++++++++++++++++++++++++ sysdeps/unix/i386/i586/clock_gettime.c | 71 +++++++++++++++++++++++++ sysdeps/unix/i386/i686/Implies | 1 + sysdeps/unix/sysv/linux/i386/bits/time.h | 75 ++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/i386/get_clockfreq.c | 73 ++++++++++++++++++++++++++ time/Makefile | 7 +-- time/Versions | 7 --- 16 files changed, 502 insertions(+), 16 deletions(-) create mode 100644 sysdeps/generic/clock_getcpuclockid.c create mode 100644 sysdeps/generic/get_clockfreq.c create mode 100644 sysdeps/mach/hurd/i386/bits/time.h create mode 100644 sysdeps/unix/i386/clock_getcpuclockid.c create mode 100644 sysdeps/unix/i386/i586/clock_getres.c create mode 100644 sysdeps/unix/i386/i586/clock_gettime.c create mode 100644 sysdeps/unix/i386/i686/Implies create mode 100644 sysdeps/unix/sysv/linux/i386/bits/time.h create mode 100644 sysdeps/unix/sysv/linux/i386/get_clockfreq.c diff --git a/ChangeLog b/ChangeLog index 6756fcc..d0cfefb 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,31 @@ +2000-04-10 Ulrich Drepper + + * Versions.def (librt): Add GLIBC_2.2. + * rt/Makefile (librt-routines): Add get_clockfreq, clock_getcpuclockid, + clock_getres, clock_gettime, clock_settime, timer_create, timer_delete, + timer_getoverr, timer_gettime, and timer_settime. + * rt/Versions [librt] (GLIBC_2.2): Add clock_getres, clock_gettime, + clock_settime, timer_create, timer_delete, timer_getoverrun, + timer_gettime, and timer_settime. + * sysdeps/generic/clock_getcpuclockid.c: New file. + * sysdeps/generic/get_clockfreq.c: New file. + * sysdeps/unix/i386/clock_getcpuclockid.c: New file. + * sysdeps/unix/sysv/linux/i386/get_clockfreq.c: New file. + * sysdeps/mach/hurd/i386/bits/time.h: New file. + * sysdeps/unix/i386/i586/clock_getres.c: New file. + * sysdeps/unix/i386/i586/clock_gettime.c: New file. + * sysdeps/unix/i386/i686/Implies: New file. + * sysdpes/unix/sysv/linux/i386/bits/time.h: New file. + * time/Makefile (routines): Move clock_getres, clock_gettime, + clock_settime, timer_create, timer_delete, timer_getoverr, + timer_gettime, and timer_settime to rt/Makefile. + * time/Versions [libc] (GLIBC_2.2): Remove clock_getres, clock_gettime, + clock_settime, timer_create, timer_delete, timer_getoverrun, + timer_gettime, and timer_settime. + + * sysdeps/mach/hurd/bits/time.h: Drop K&R compatibility. Use __const__ + and not const as attribute name. + 2000-04-10 Thorsten Kukuk * elf/cache.c (save_cache): Make sure /etc/ld.so.cache is mode 644. diff --git a/Versions.def b/Versions.def index 962bcf6..14842e7 100644 --- a/Versions.def +++ b/Versions.def @@ -72,6 +72,7 @@ libresolv { } librt { GLIBC_2.1 + GLIBC_2.2 } libutil { GLIBC_2.0 diff --git a/rt/Makefile b/rt/Makefile index 2044eb4..b2688f9 100644 --- a/rt/Makefile +++ b/rt/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. +# Copyright (C) 1997, 1998, 1999, 2000 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 @@ -26,7 +26,10 @@ headers := aio.h librt-routines := aio_cancel aio_error aio_fsync aio_misc aio_read \ aio_read64 aio_return aio_suspend aio_write \ aio_write64 lio_listio lio_listio64 aio_sigqueue \ - aio_notify + aio_notify get_clockfreq clock_getcpuclockid \ + clock_getres clock_gettime clock_settime \ + timer_create timer_delete timer_getoverr \ + timer_gettime timer_settime # Make sure that everything is distributed independent of configuration. distribute := aio_misc.h $(librt-routines:=.c) $(librt-map) diff --git a/rt/Versions b/rt/Versions index abe9e33..aec059c 100644 --- a/rt/Versions +++ b/rt/Versions @@ -5,4 +5,12 @@ librt { aio_init; aio_read; aio_read64; aio_return; aio_return64; aio_suspend; aio_suspend64; aio_write; aio_write64; lio_listio; lio_listio64; } + GLIBC_2.2 { + # c* + clock_getres; clock_gettime; clock_settime; clock_getcpuclockid; + + # t* + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } } diff --git a/sysdeps/generic/clock_getcpuclockid.c b/sysdeps/generic/clock_getcpuclockid.c new file mode 100644 index 0000000..8014db5 --- /dev/null +++ b/sysdeps/generic/clock_getcpuclockid.c @@ -0,0 +1,27 @@ +/* Copyright (C) 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 +#include + +int +clock_getcpuclockid (pid_t pid, clockid_t *clock_id) +{ + /* We don't have a timer for that. */ + return ENOENT; +} diff --git a/sysdeps/generic/get_clockfreq.c b/sysdeps/generic/get_clockfreq.c new file mode 100644 index 0000000..210ba27 --- /dev/null +++ b/sysdeps/generic/get_clockfreq.c @@ -0,0 +1,26 @@ +/* Get frequency of the system processor. + Copyright (C) 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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. */ + +unsigned long long int +__get_clockfreq (void) +{ + /* There is no generic way to find this out since we have in general + no counter register either. */ + return 0ull; +} diff --git a/sysdeps/mach/hurd/bits/time.h b/sysdeps/mach/hurd/bits/time.h index 69a64cf..55ae998 100644 --- a/sysdeps/mach/hurd/bits/time.h +++ b/sysdeps/mach/hurd/bits/time.h @@ -1,5 +1,5 @@ /* System-dependent timing definitions. Hurd version. - Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1999, 2000 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 @@ -38,7 +38,7 @@ presents the real value for clock ticks per second for the system. This value is determined at runtime. */ # define CLK_TCK __libc_clk_tck() -extern int __libc_clk_tck __P ((void)) __attribute__ ((const)); +extern int __libc_clk_tck (void) __attribute__ ((__const__)); # endif /* Clock ID used in clock and timer functions. */ diff --git a/sysdeps/mach/hurd/i386/bits/time.h b/sysdeps/mach/hurd/i386/bits/time.h new file mode 100644 index 0000000..f113030 --- /dev/null +++ b/sysdeps/mach/hurd/i386/bits/time.h @@ -0,0 +1,78 @@ +/* System-dependent timing definitions. i386/Hurd version. + Copyright (C) 1996, 1997, 1999, 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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. */ + +/* + * Never include this file directly; use instead. + */ + +#ifndef __need_timeval +# ifndef _BITS_TIME_H +# define _BITS_TIME_H 1 + +/* ISO/IEC 9899:1990 7.12.1: + The macro `CLOCKS_PER_SEC' is the number per second of the value + returned by the `clock' function. */ +/* CAE XSH, Issue 4, Version 2: + The value of CLOCKS_PER_SEC is required to be 1 million on all + XSI-conformant systems. */ +# define CLOCKS_PER_SEC 1000000 + +# ifndef __STRICT_ANSI__ +/* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK + presents the real value for clock ticks per second for the system. + This value is determined at runtime. */ +# define CLK_TCK __libc_clk_tck() +extern int __libc_clk_tck (void) __attribute__ ((__const__)); +# endif + +/* Clock ID used in clock and timer functions. */ +typedef int __clockid_t; + +/* Timer ID returned by `timer_create'. */ +typedef int __timer_t; + +# ifdef __USE_POSIX199309 +/* Identifier for system-wide realtime clock. */ +# define CLOCK_REALTIME 0 +/* High-resolution timer from the CPU. */ +# define __CLOCK_HIGHRES 1 + +/* Flag to indicate time is absolute. */ +# define TIMER_ABSTIME 1 +# endif + +# endif /* bits/time.h */ +#endif + + +#ifdef __need_timeval +# undef __need_timeval +# ifndef _STRUCT_TIMEVAL +# define _STRUCT_TIMEVAL 1 +# include + +/* A time value that is accurate to the nearest + microsecond but also has a range of years. */ +struct timeval + { + __time_t tv_sec; /* Seconds. */ + __suseconds_t tv_usec; /* Microseconds. */ + }; +# endif /* struct timeval */ +#endif /* need timeval */ diff --git a/sysdeps/unix/i386/clock_getcpuclockid.c b/sysdeps/unix/i386/clock_getcpuclockid.c new file mode 100644 index 0000000..1fd8ad9 --- /dev/null +++ b/sysdeps/unix/i386/clock_getcpuclockid.c @@ -0,0 +1,34 @@ +/* Copyright (C) 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 +#include +#include + +int +clock_getcpuclockid (pid_t pid, clockid_t *clock_id) +{ + /* We don't allow any process ID but our own. */ + if (pid != 0 && pid != getpid ()) + return EPERM; + + /* Store the number. */ + *clock_id = __CLOCK_HIGHRES; + + return 0; +} diff --git a/sysdeps/unix/i386/i586/clock_getres.c b/sysdeps/unix/i386/i586/clock_getres.c new file mode 100644 index 0000000..abafcc0 --- /dev/null +++ b/sysdeps/unix/i386/i586/clock_getres.c @@ -0,0 +1,71 @@ +/* Copyright (C) 1999, 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 +#include + +/* This implementation uses the TSC register in modern (i586 and up) IA-32 + processors (most modern clones also provide it). Since we need the + resolution of the clock and since determining this is not cheap, we + cache the value. But this means that systems with processors running + at different speeds or process migration to machines with slower or + faster processors will not work without changes. */ + + +/* Function to determine processor frequency. */ +extern unsigned long long int __get_clockfreq (void); + +/* Clock frequency of the processor. We make it a 64-bit variable + because some jokers are already playing with processors with more + than 4GHz. */ +static long int nsec; + + +/* We add an limitation here: we assume that the machine is not up as + long as it takes to wrap-around the 64-bit timestamp counter. On a + 4GHz machine it would take 136 years of uptime to wrap around so + this "limitation" is not severe. */ +#define EXTRA_CLOCK_CASES \ + case __CLOCK_HIGHRES: \ + { \ + if (__builtin_expect (nsec != 0, 0)) \ + { \ + unsigned long long int freq; \ + \ + /* 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. */ \ + break; \ + \ + nsec = MAX (1000000000ULL / freq, 1); \ + } \ + \ + /* File in the values. The seconds are always zero (unless we \ + have a 1Hz machine). */ \ + res->tv_sec = 0; \ + res->tv_nsec = nsec; \ + \ + retval = 0; \ + } \ + break; + +#include diff --git a/sysdeps/unix/i386/i586/clock_gettime.c b/sysdeps/unix/i386/i586/clock_gettime.c new file mode 100644 index 0000000..f623cec --- /dev/null +++ b/sysdeps/unix/i386/i586/clock_gettime.c @@ -0,0 +1,71 @@ +/* Copyright (C) 1999, 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 + +/* This implementation uses the TSC register in modern (i586 and up) IA-32 + processors (most modern clones also provide it). Since we need the + resolution of the clock and since determining this is not cheap, we + cache the value. But this means that systems with processors running + at different speeds or process migration to machines with slower or + faster processors will not work without changes. */ + + +/* Function to determine processor frequency. */ +extern unsigned long long int __get_glockfreq (void); + +/* Clock frequency of the processor. We make it a 64-bit variable + because some jokers are already playing with processors with more + than 4GHz. */ +static unsigned long long int freq; + + +/* We add an limitation here: we assume that the machine is not up as + long as it takes to wrap-around the 64-bit timestamp counter. On a + 4GHz machine it would take 136 years of uptime to wrap around so + this "limitation" is not severe. */ +#define EXTRA_CLOCK_CASES \ + case __CLOCK_HIGHRES: \ + { \ + unsigned long long int 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. */ \ + break; \ + } \ + \ + /* Get the current counter. */ \ + asm volatile ("rdtsc" : "=A" (tsc)); \ + \ + /* Compute the seconds. */ \ + tp->tv_sec = tsc / freq; \ + \ + /* And the nanoseconds. This computation should be stable until \ + we get machines with about 16GHz frequency. */ \ + tp->tv_nsec = ((tsc % freq) * 1000000000ULL) / freq; \ + } \ + break; + +#include diff --git a/sysdeps/unix/i386/i686/Implies b/sysdeps/unix/i386/i686/Implies new file mode 100644 index 0000000..6f31c95 --- /dev/null +++ b/sysdeps/unix/i386/i686/Implies @@ -0,0 +1 @@ +unix/i386/i586 diff --git a/sysdeps/unix/sysv/linux/i386/bits/time.h b/sysdeps/unix/sysv/linux/i386/bits/time.h new file mode 100644 index 0000000..dfd3afa --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/bits/time.h @@ -0,0 +1,75 @@ +/* System-dependent timing definitions. Linux version. + Copyright (C) 1996, 1997, 1999, 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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. */ + +/* + * Never include this file directly; use instead. + */ + +#ifndef __need_timeval +# ifndef _BITS_TIME_H +# define _BITS_TIME_H 1 + +/* ISO/IEC 9899:1990 7.12.1: + The macro `CLOCKS_PER_SEC' is the number per second of the value + returned by the `clock' function. */ +/* CAE XSH, Issue 4, Version 2: + The value of CLOCKS_PER_SEC is required to be 1 million on all + XSI-conformant systems. */ +# define CLOCKS_PER_SEC 1000000 + +# ifndef __STRICT_ANSI__ +/* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK + presents the real value for clock ticks per second for the system. */ +# define CLK_TCK 100 +# endif + +/* Clock ID used in clock and timer functions. */ +typedef int __clockid_t; + +/* Timer ID returned by `timer_create'. */ +typedef int __timer_t; + +# ifdef __USE_POSIX199309 +/* Identifier for system-wide realtime clock. */ +# define CLOCK_REALTIME 0 +/* High-resolution timer from the CPU. */ +# define __CLOCK_HIGHRES 1 + +/* Flag to indicate time is absolute. */ +# define TIMER_ABSTIME 1 +# endif + +# endif /* bits/time.h */ +#endif + +#ifdef __need_timeval +# undef __need_timeval +# ifndef _STRUCT_TIMEVAL +# define _STRUCT_TIMEVAL 1 +# include + +/* A time value that is accurate to the nearest + microsecond but also has a range of years. */ +struct timeval + { + __time_t tv_sec; /* Seconds. */ + __suseconds_t tv_usec; /* Microseconds. */ + }; +# endif /* struct timeval */ +#endif /* need timeval */ diff --git a/sysdeps/unix/sysv/linux/i386/get_clockfreq.c b/sysdeps/unix/sysv/linux/i386/get_clockfreq.c new file mode 100644 index 0000000..28f56c8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/get_clockfreq.c @@ -0,0 +1,73 @@ +/* Get frequency of the system processor. i386/Linux version. + Copyright (C) 2000 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 +#include +#include + + +unsigned long long int +__get_clockfreq (void) +{ + /* We read the information from the /proc filesystem. It contains at + least one line like + cpu MHz : 497.840237 + We search for this line and convert the number in an integer. */ + unsigned long long int result = 0ull; + int fd; + + fd = open ("/proc/cpuinfo", O_RDONLY); + if (__builtin_expect (fd != -1, 1)) + { + /* XXX AFAIK the /proc filesystem can generate "files" only up + to a size of 4096 bytes. */ + char buf[4096]; + ssize_t n; + + n = read (fd, buf, sizeof buf); + if (__builtin_expect (n, 1) > 0) + { + char *mhz = memmem (buf, n, "cpu MHz", 7); + + if (__builtin_expect (mhz != NULL, 1)) + { + char *endp = buf + n; + + /* Search for the beginning of the string. */ + while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n') + ++mhz; + + while (mhz < endp && *mhz != '\n') + { + if (*mhz >= '0' && *mhz <= '9') + { + result *= 10; + result += *mhz - '0'; + } + + ++mhz; + } + } + } + + close (fd); + } + + return result; +} diff --git a/time/Makefile b/time/Makefile index dc110ac..baa26e9 100644 --- a/time/Makefile +++ b/time/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc. +# Copyright (C) 1991-1999, 2000 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 @@ -28,10 +28,7 @@ routines := offtime asctime clock ctime ctime_r difftime \ gettimeofday settimeofday adjtime tzset \ tzfile getitimer setitimer \ stime dysize timegm ftime \ - strptime getdate wcsftime \ - clock_getres clock_gettime clock_settime \ - timer_create timer_delete timer_getoverr \ - timer_gettime timer_settime + strptime getdate wcsftime tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \ tst-getdate diff --git a/time/Versions b/time/Versions index 4f713a9..ed6429e 100644 --- a/time/Versions +++ b/time/Versions @@ -47,13 +47,6 @@ libc { getdate; getdate_r; getitimer; } GLIBC_2.2 { - # c* - clock_getres; clock_gettime; clock_settime; - - # t* - timer_create; timer_delete; timer_getoverrun; timer_gettime; - timer_settime; - # w* wcsftime; } -- 2.7.4