/*
 *             Automatically Tuned Linear Algebra Software v3.2
 *                    (C) Copyright 1997 R. Clint Whaley                     
 *
 * 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. The name of the University of Tennessee, the ATLAS group,
 *      or the names of its contributers may not be used to endorse
 *      or promote products derived from this software without specific
 *      written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 UNIVERSITY 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. 
 *
 */

#if defined(UseClock)
   #include <time.h>
   double ATL_cputime(void)
   {
      clock_t t1;
      static clock_t t0=0;
      static const double CPS = CLOCKS_PER_SEC;
      double d;
   
      if (t0 == 0) t0 = clock();
      t1 = clock() - t0;
      d = t1 / CPS;
      return(d);
   }
#elif defined(UseTimes)
   #include <stdlib.h>
   #include <sys/times.h>
   #include <unistd.h>
   double ATL_cputime(void)
   {
      struct tms ts;
      static double ClockTick=0.0;
   
      if (ClockTick == 0.0) ClockTick = (double) sysconf(_SC_CLK_TCK);
      times(&ts);
      return( (double) ts.tms_utime / ClockTick );
   }
#else
   #include <stdlib.h>
   #include <sys/time.h>
   #include <sys/resource.h>
   double ATL_cputime(void)
   {
      struct rusage ruse;
      getrusage(RUSAGE_SELF, &ruse);
      return( (double)(ruse.ru_utime.tv_sec+ruse.ru_utime.tv_usec/1000000.0) );
   }
#endif

