You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.4 KiB
63 lines
2.4 KiB
/* |
|
* 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) */ |
|
}
|
|
|