diff options
Diffstat (limited to 'sysdeps/unix/clock_gettime.c')
| -rw-r--r-- | sysdeps/unix/clock_gettime.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/sysdeps/unix/clock_gettime.c b/sysdeps/unix/clock_gettime.c deleted file mode 100644 index 5262066f51..0000000000 --- a/sysdeps/unix/clock_gettime.c +++ /dev/null @@ -1,136 +0,0 @@ -/* clock_gettime -- Get the current time from a POSIX clockid_t. Unix version. - Copyright (C) 1999-2017 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; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <stdint.h> -#include <time.h> -#include <sys/time.h> -#include <libc-internal.h> -#include <ldsodefs.h> - - -#if HP_TIMING_AVAIL -/* 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 hp_timing_t freq; - - -/* This function is defined in the thread library. */ -extern int __pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq, - struct timespec *tp) - __attribute__ ((__weak__)); - -static int -hp_timing_gettime (clockid_t clock_id, struct timespec *tp) -{ - hp_timing_t tsc; - - if (__glibc_unlikely (freq == 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 (__glibc_unlikely (freq == 0)) - /* Something went wrong. */ - return -1; - } - - if (clock_id != CLOCK_PROCESS_CPUTIME_ID - && __pthread_clock_gettime != NULL) - return __pthread_clock_gettime (clock_id, freq, tp); - - /* Get the current counter. */ - HP_TIMING_NOW (tsc); - - /* Compute the offset since the start time of the process. */ - tsc -= GL(dl_cpuclock_offset); - - /* 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) * UINT64_C (1000000000)) / freq; - - return 0; -} -#endif - - -static inline int -realtime_gettime (struct timespec *tp) -{ - struct timeval tv; - int retval = gettimeofday (&tv, NULL); - if (retval == 0) - /* Convert into `timespec'. */ - TIMEVAL_TO_TIMESPEC (&tv, tp); - return retval; -} - - -/* Get current value of CLOCK and store it in TP. */ -int -__clock_gettime (clockid_t clock_id, struct timespec *tp) -{ - int retval = -1; - - switch (clock_id) - { -#ifdef SYSDEP_GETTIME - SYSDEP_GETTIME; -#endif - -#ifndef HANDLED_REALTIME - case CLOCK_REALTIME: - { - struct timeval tv; - retval = gettimeofday (&tv, NULL); - if (retval == 0) - TIMEVAL_TO_TIMESPEC (&tv, tp); - } - break; -#endif - - default: -#ifdef SYSDEP_GETTIME_CPU - SYSDEP_GETTIME_CPU (clock_id, tp); -#endif -#if HP_TIMING_AVAIL - if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1)) - == CLOCK_THREAD_CPUTIME_ID) - retval = hp_timing_gettime (clock_id, tp); - else -#endif - __set_errno (EINVAL); - break; - -#if HP_TIMING_AVAIL && !defined HANDLED_CPUTIME - case CLOCK_PROCESS_CPUTIME_ID: - retval = hp_timing_gettime (clock_id, tp); - break; -#endif - } - - return retval; -} -weak_alias (__clock_gettime, clock_gettime) -libc_hidden_def (__clock_gettime) |