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2003-07-03  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_AT_CLKTCK):
	Define.
	* sysdeps/unix/sysv/linux/prof-freq.h: New file.
This commit is contained in:
Ulrich Drepper 2003-07-03 08:51:46 +00:00
parent 56421b23d7
commit 1418bf990e
4 changed files with 64 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2003-07-03 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_AT_CLKTCK):
Define.
* sysdeps/unix/sysv/linux/prof-freq.h: New file.
2003-07-02 Jakub Jelinek <jakub@redhat.com>
* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Protect new_sysinfo

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nptl/Banner
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NPTL 0.51 by Ulrich Drepper
NPTL 0.52 by Ulrich Drepper

6
sysdeps/unix/sysv/linux/kernel-features.h
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@ -175,6 +175,12 @@
# define __ASSUME_FCNTL64 1
#endif
/* The AT_CLKTCK auxiliary vector entry was introduction in the 2.4.0
series. */
#if __LINUX_KERNEL_VERSION >= 132097
# define __ASSUME_AT_CLKTCK 1
#endif
/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I
don't know when it got introduced). But PowerPC64 does not support
separate FCNTL64 call, FCNTL is already 64-bit */

51
sysdeps/unix/sysv/linux/prof-freq.c Normal file
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/* Determine realtime clock frequency.
Copyright (C) 2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sys/time.h>
#include <libc-internal.h>
#include "kernel-features.h"
#include <ldsodefs.h>
int
__profile_frequency (void)
{
#ifdef __ASSUME_AT_CLKTCK
return GL(dl_clktck);
#else
if (GL(dl_clktck) != )
return GL(dl_clktck);
struct itimerval tim;
tim.it_interval.tv_sec = 0;
tim.it_interval.tv_usec = 1;
tim.it_value.tv_sec = 0;
tim.it_value.tv_usec = 0;
__setitimer (ITIMER_REAL, &tim, 0);
__setitimer (ITIMER_REAL, 0, &tim);
if (tim.it_interval.tv_usec < 2)
return 0;
return 1000000 / tim.it_interval.tv_usec;
#endif
}
libc_hidden_def (__profile_frequency)