mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 19:30:10 +00:00
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
|
/* Copyright (C) 2001, 2004 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; 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 <errno.h>
|
||
|
|
#include <time.h>
|
||
|
|
#include <libc-internal.h>
|
||
|
|
#include "internals.h"
|
||
|
|
#include "spinlock.h"
|
||
|
|
|
||
|
|
|
||
|
|
#if HP_TIMING_AVAIL
|
||
|
|
int
|
||
|
|
__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
|
||
|
|
struct timespec *tp)
|
||
|
|
{
|
||
|
|
hp_timing_t tsc, cpuclock_offset;
|
||
|
|
pthread_descr self = thread_self ();
|
||
|
|
pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
|
||
|
|
const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE;
|
||
|
|
|
||
|
|
if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread)
|
||
|
|
cpuclock_offset = THREAD_GETMEM (self, p_cpuclock_offset);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pthread_descr th;
|
||
|
|
pthread_handle handle = thread_handle (thread);
|
||
|
|
__pthread_lock (&handle->h_lock, NULL);
|
||
|
|
th = handle->h_descr;
|
||
|
|
if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated)
|
||
|
|
{
|
||
|
|
__pthread_unlock (&handle->h_lock);
|
||
|
|
__set_errno (EINVAL);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
cpuclock_offset = th->p_cpuclock_offset;
|
||
|
|
__pthread_unlock (&handle->h_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the current counter. */
|
||
|
|
HP_TIMING_NOW (tsc);
|
||
|
|
|
||
|
|
/* Compute the offset since the start time of the process. */
|
||
|
|
tsc -= 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) * 1000000000ull) / freq;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|