mirror of
https://github.com/autc04/Retro68.git
synced 2024-08-17 20:29:49 +00:00
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
|
/*
|
||
|
* Copyright (c) 1983, 1993
|
||
|
* The Regents of the University of California. All rights reserved.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution.
|
||
|
* 3. Neither the name of the University nor the names of its contributors
|
||
|
* may be used to endorse or promote products derived from this software
|
||
|
* without specific prior written permission.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
* SUCH DAMAGE.
|
||
|
*/
|
||
|
#include "gprof.h"
|
||
|
#include "hertz.h"
|
||
|
|
||
|
|
||
|
int
|
||
|
hertz ()
|
||
|
{
|
||
|
#ifdef HERTZ
|
||
|
return HERTZ;
|
||
|
#else /* ! defined (HERTZ) */
|
||
|
#ifdef HAVE_SETITIMER
|
||
|
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 1000000 / tim.it_interval.tv_usec;
|
||
|
}
|
||
|
#endif /* ! defined (HAVE_SETITIMER) */
|
||
|
#if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
|
||
|
return sysconf (_SC_CLK_TCK);
|
||
|
#else /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
|
||
|
#ifdef __MSDOS__
|
||
|
return 18;
|
||
|
#else /* ! defined (__MSDOS__) */
|
||
|
return HZ_WRONG;
|
||
|
#endif /* ! defined (__MSDOS__) */
|
||
|
#endif /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
|
||
|
#endif /* ! defined (HERTZ) */
|
||
|
}
|