text: /*
   * Copyright (c) 2012 David Siñuela Pastor, siu.4coders@gmail.com
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #include "minunit.h"
  
  #if defined(_WIN32)
  #include <Windows.h>
  
  #elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
  
  #include <unistd.h> /* POSIX flags */
  #include <time.h>   /* clock_gettime(), time() */
  #include <sys/time.h>   /* gethrtime(), gettimeofday() */
  #include <sys/resource.h>
  #include <sys/times.h>
  
  #if defined(__MACH__) && defined(__APPLE__)
  #include <mach/mach.h>
  #include <mach/mach_time.h>
  #endif
  
  #else
  #error "Unable to define timers for an unknown OS."
  #endif
  
  #include <stdio.h>
  #include <math.h>
  
  /* Misc. counters */
  int minunit_run = 0;
  int minunit_assert = 0;
  int minunit_fail = 0;
  int minunit_status = 0;
  
  /* Timers */
  double minunit_real_timer = 0;
  double minunit_proc_timer = 0;
  
  /* Last message */
  char minunit_last_message[MINUNIT_MESSAGE_LEN];
  
  /* Test setup and teardown function pointers */
  void (*minunit_setup)(void) = NULL;
  void (*minunit_teardown)(void) = NULL;
  
  /*
   * The following two functions were written by David Robert Nadeau
   * from http//NadeauSoftware.com/ and distributed under the
   * Creative Commons Attribution 3.0 Unported License
   */
  double mu_timer_real(void)
  {
  #if defined(_WIN32)
      FILETIME tm;
      ULONGLONG t;
  #if defined(NTDDI_WIN8) && NTDDI_VERSION >= NTDDI_WIN8
      /* Windows 8, Windows Server 2012 and later. ---------------- */
      GetSystemTimePreciseAsFileTime( &tm );
  #else
      /* Windows 2000 and later. ---------------------------------- */
      GetSystemTimeAsFileTime( &tm );
  #endif
      t = ((ULONGLONG)tm.dwHighDateTime << 32) | (ULONGLONG)tm.dwLowDateTime;
      return (double)t / 10000000.0;
  
  #elif (defined(__hpux) || defined(hpux)) || ((defined(__sun__) || defined(__sun) || defined(sun)) && (defined(__SVR4) || defined(__svr4__)))
      /* HP-UX, Solaris. ------------------------------------------ */
      return (double)gethrtime( ) / 1000000000.0;
  
  #elif defined(__MACH__) && defined(__APPLE__)
      /* OSX. ----------------------------------------------------- */
      static double timeConvert = 0.0;
      if ( timeConvert == 0.0 )
      {
          mach_timebase_info_data_t timeBase;
          (void)mach_timebase_info( &timeBase );
          timeConvert = (double)timeBase.numer /
              (double)timeBase.denom /
              1000000000.0;
      }
      return (double)mach_absolute_time( ) * timeConvert;
  
  #elif defined(_POSIX_VERSION)
      struct timeval tm;
      /* POSIX. --------------------------------------------------- */
  #if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
      {
          struct timespec ts;
  #if defined(CLOCK_MONOTONIC_PRECISE)
          /* BSD. --------------------------------------------- */
          const clockid_t id = CLOCK_MONOTONIC_PRECISE;
  #elif defined(CLOCK_MONOTONIC_RAW)
          /* Linux. ------------------------------------------- */
          const clockid_t id = CLOCK_MONOTONIC_RAW;
  #elif defined(CLOCK_HIGHRES)
          /* Solaris. ----------------------------------------- */
          const clockid_t id = CLOCK_HIGHRES;
  #elif defined(CLOCK_MONOTONIC)
          /* AIX, BSD, Linux, POSIX, Solaris. ----------------- */
          const clockid_t id = CLOCK_MONOTONIC;
  #elif defined(CLOCK_REALTIME)
          /* AIX, BSD, HP-UX, Linux, POSIX. ------------------- */
          const clockid_t id = CLOCK_REALTIME;
  #else
          const clockid_t id = (clockid_t)-1; /* Unknown. */
  #endif /* CLOCK_* */
          if ( id != (clockid_t)-1 && clock_gettime( id, &ts ) != -1 )
              return (double)ts.tv_sec +
                  (double)ts.tv_nsec / 1000000000.0;
          /* Fall thru. */
      }
  #endif /* _POSIX_TIMERS */
  
      /* AIX, BSD, Cygwin, HP-UX, Linux, OSX, POSIX, Solaris. ----- */
      gettimeofday( &tm, NULL );
      return (double)tm.tv_sec + (double)tm.tv_usec / 1000000.0;
  #else
      return -1.0;        /* Failed. */
  #endif
  }
  
  double mu_timer_cpu(void)
  {
  #if defined(_WIN32)
      /* Windows -------------------------------------------------- */
      FILETIME createTime;
      FILETIME exitTime;
      FILETIME kernelTime;
      FILETIME userTime;
      if ( GetProcessTimes( GetCurrentProcess( ),
          &createTime, &exitTime, &kernelTime, &userTime ) != -1 )
      {
          SYSTEMTIME userSystemTime;
          if ( FileTimeToSystemTime( &userTime, &userSystemTime ) != -1 )
              return (double)userSystemTime.wHour * 3600.0 +
                  (double)userSystemTime.wMinute * 60.0 +
                  (double)userSystemTime.wSecond +
                  (double)userSystemTime.wMilliseconds / 1000.0;
      }
  
  #elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
      /* AIX, BSD, Cygwin, HP-UX, Linux, OSX, and Solaris --------- */
  
  #if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
      /* Prefer high-res POSIX timers, when available. */
      {
          clockid_t id;
          struct timespec ts;
  #if _POSIX_CPUTIME > 0
          /* Clock ids vary by OS.  Query the id, if possible. */
          if ( clock_getcpuclockid( 0, &id ) == -1 )
  #endif
  #if defined(CLOCK_PROCESS_CPUTIME_ID)
              /* Use known clock id for AIX, Linux, or Solaris. */
              id = CLOCK_PROCESS_CPUTIME_ID;
  #elif defined(CLOCK_VIRTUAL)
              /* Use known clock id for BSD or HP-UX. */
              id = CLOCK_VIRTUAL;
  #else
              id = (clockid_t)-1;
  #endif
          if ( id != (clockid_t)-1 && clock_gettime( id, &ts ) != -1 )
              return (double)ts.tv_sec +
                  (double)ts.tv_nsec / 1000000000.0;
      }
  #endif
  
  #if defined(RUSAGE_SELF)
      {
          struct rusage rusage;
          if ( getrusage( RUSAGE_SELF, &rusage ) != -1 )
              return (double)rusage.ru_utime.tv_sec +
                  (double)rusage.ru_utime.tv_usec / 1000000.0;
      }
  #endif
  
  #if defined(_SC_CLK_TCK)
      {
          const double ticks = (double)sysconf( _SC_CLK_TCK );
          struct tms tms;
          if ( times( &tms ) != (clock_t)-1 )
              return (double)tms.tms_utime / ticks;
      }
  #endif
  
  #if defined(CLOCKS_PER_SEC)
      {
          clock_t cl = clock( );
          if ( cl != (clock_t)-1 )
              return (double)cl / (double)CLOCKS_PER_SEC;
      }
  #endif
  
  #endif
  
      return -1;      /* Failed. */
  }
  