Subversion Repositories openrisc

/* Wrappers for platform timing functions.

   Copyright (C) 2003, 2007, 2009, 2011 Free Software Foundation, Inc.

This file is part of the GNU Fortran runtime library (libgfortran).

Libgfortran is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public

License as published by the Free Software Foundation; either

version 3 of the License, or (at your option) any later version.

Libgfortran is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

#ifndef LIBGFORTRAN_TIME_H

#define LIBGFORTRAN_TIME_H

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <errno.h>

/* The time related intrinsics (DTIME, ETIME, CPU_TIME) to "compare

   different algorithms on the same computer or discover which parts

   are the most expensive", need a way to get the CPU time with the

   finest resolution possible. We can only be accurate up to

   microseconds.

   As usual with UNIX systems, unfortunately no single way is

   available for all systems.  */

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h>

#endif

#include <time.h>

#ifdef HAVE_SYS_TYPES_H

     #include <sys/types.h>

#endif

/* The most accurate way to get the CPU time is getrusage (). */

#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)

#  include <sys/resource.h>

#endif  /* HAVE_GETRUSAGE && HAVE_SYS_RESOURCE_H  */

/* The most accurate way to get the CPU time is getrusage ().

   If we have times(), that's good enough, too.  */

#if !defined (HAVE_GETRUSAGE) || !defined (HAVE_SYS_RESOURCE_H)

/* For times(), we _must_ know the number of clock ticks per second.  */

#  if defined (HAVE_TIMES) && (defined (HZ) || defined (_SC_CLK_TCK) || defined (CLK_TCK))

#    ifdef HAVE_SYS_PARAM_H

#      include <sys/param.h>

#    endif

#    if defined (HAVE_SYS_TIMES_H)

#      include <sys/times.h>

#    endif

#    ifndef HZ

#      if defined _SC_CLK_TCK

#        define HZ  sysconf(_SC_CLK_TCK)

#      else

#        define HZ  CLK_TCK

#      endif

#    endif

#  endif  /* HAVE_TIMES etc.  */

#endif  /* !HAVE_GETRUSAGE || !HAVE_SYS_RESOURCE_H  */

/* If the re-entrant version of localtime is not available, provide a

   fallback implementation.  On some targets where the _r version is

   not available, localtime uses thread-local storage so it's

   threadsafe.  */

#ifndef HAVE_LOCALTIME_R

/* If _POSIX is defined localtime_r gets defined by mingw-w64 headers.  */

#ifdef localtime_r

#undef localtime_r

#endif

static inline struct tm *

localtime_r (const time_t * timep, struct tm * result)

{

  *result = *localtime (timep);

  return result;

}

#endif

/* Helper function for the actual implementation of the DTIME, ETIME and

   CPU_TIME intrinsics.  Returns 0 for success or -1 if no

   CPU time could be computed.  */

#ifdef __MINGW32__

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

static inline int

gf_cputime (long *user_sec, long *user_usec, long *system_sec, long *system_usec)

{

  union {

    FILETIME ft;

    unsigned long long ulltime;

  } kernel_time,  user_time;

  FILETIME unused1, unused2;

  /* No support for Win9x.  The high order bit of the DWORD

     returned by GetVersion is 0 for NT and higher. */

  if (GetVersion () >= 0x80000000)

    {

      *user_sec = *system_sec = 0;

      *user_usec = *system_usec = 0;

      return -1;

    }

  /* The FILETIME structs filled in by GetProcessTimes represent

     time in 100 nanosecond units. */

  GetProcessTimes (GetCurrentProcess (), &unused1, &unused2,

                   &kernel_time.ft, &user_time.ft);

  *user_sec = user_time.ulltime / 10000000;

  *user_usec = (user_time.ulltime % 10000000) / 10;

  *system_sec = kernel_time.ulltime / 10000000;

  *system_usec = (kernel_time.ulltime % 10000000) / 10;

  return 0;

}

#else

static inline int

gf_cputime (long *user_sec, long *user_usec, long *system_sec, long *system_usec)

{

#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)

  struct rusage usage;

  int err;

  err = getrusage (RUSAGE_SELF, &usage);

  *user_sec = usage.ru_utime.tv_sec;

  *user_usec = usage.ru_utime.tv_usec;

  *system_sec = usage.ru_stime.tv_sec;

  *system_usec = usage.ru_stime.tv_usec;

  return err;

#elif defined HAVE_TIMES

  struct tms buf;

  clock_t err;

  err = times (&buf);

  *user_sec = buf.tms_utime / HZ;

  *user_usec = buf.tms_utime % HZ * (1000000. / HZ);

  *system_sec = buf.tms_stime / HZ;

  *system_usec = buf.tms_stime % HZ * (1000000. / HZ);

  if ((err == (clock_t) -1) && errno != 0)

    return -1;

  return 0;

#else 

  clock_t c = clock ();

  *user_sec = c / CLOCKS_PER_SEC;

  *user_usec = c % CLOCKS_PER_SEC * (1000000. / CLOCKS_PER_SEC);

  *system_sec = *system_usec = 0;

  if (c == (clock_t) -1)

    return -1;

  return 0;

#endif

}

#endif

/* Realtime clock with microsecond resolution, falling back to less

   precise functions if the target does not support gettimeofday().

   Arguments:

   secs     - OUTPUT, seconds

   usecs    - OUTPUT, microseconds

   The OUTPUT arguments shall represent the number of seconds and

   nanoseconds since the Epoch.

   Return value: 0 for success, -1 for error. In case of error, errno

   is set.

*/

static inline int

gf_gettime (time_t * secs, long * usecs)

{

#ifdef HAVE_GETTIMEOFDAY

  struct timeval tv;

  int err;

  err = gettimeofday (&tv, NULL);

  *secs = tv.tv_sec;

  *usecs = tv.tv_usec;

  return err;

#else

  time_t t = time (NULL);

  *secs = t;

  *usecs = 0;

  if (t == ((time_t)-1))

    return -1;

  return 0;

#endif

}

#endif /* LIBGFORTRAN_TIME_H */