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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [gprof/] [hertz.c] - Blame information for rev 156

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1 38 julius
/*
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 * Copyright (c) 1983, 1993
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 *      The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include "gprof.h"
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#include "hertz.h"
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int
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hertz ()
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{
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#ifdef HERTZ
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  return HERTZ;
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#else /* ! defined (HERTZ) */
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#ifdef HAVE_SETITIMER
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  struct itimerval tim;
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  tim.it_interval.tv_sec = 0;
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  tim.it_interval.tv_usec = 1;
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  tim.it_value.tv_sec = 0;
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  tim.it_value.tv_usec = 0;
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  setitimer (ITIMER_REAL, &tim, 0);
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  setitimer (ITIMER_REAL, 0, &tim);
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  if (tim.it_interval.tv_usec >= 2)
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    {
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      return 1000000 / tim.it_interval.tv_usec;
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    }
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#endif /* ! defined (HAVE_SETITIMER) */
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#if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
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  return sysconf (_SC_CLK_TCK);
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#else /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
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#ifdef __MSDOS__
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  return 18;
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#else  /* ! defined (__MSDOS__) */
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  return HZ_WRONG;
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#endif /* ! defined (__MSDOS__) */
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#endif /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
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#endif /* ! defined (HERTZ) */
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}

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