diff options
Diffstat (limited to 'sysdeps/unix/i386/i586/clock_getres.c')
| -rw-r--r-- | sysdeps/unix/i386/i586/clock_getres.c | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/sysdeps/unix/i386/i586/clock_getres.c b/sysdeps/unix/i386/i586/clock_getres.c deleted file mode 100644 index d11d0464af..0000000000 --- a/sysdeps/unix/i386/i586/clock_getres.c +++ /dev/null @@ -1,72 +0,0 @@ -/* Copyright (C) 1999, 2000, 2001 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 <time.h> -#include <sys/param.h> -#include <libc-internal.h> - -/* 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. */ - - -/* Clock frequency of the processor. */ -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. - - We use this clock also as the monotonic clock since we don't allow - setting the CPU-time clock. If this should ever change we will have - to separate the two. */ -#define EXTRA_CLOCK_CASES \ - case CLOCK_PROCESS_CPUTIME_ID: \ - case CLOCK_THREAD_CPUTIME_ID: \ - { \ - 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 <sysdeps/posix/clock_getres.c> |