gimp/app/base/base-utils.c

/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program 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.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <glib.h>

#ifdef G_OS_WIN32
#define _WIN32_WINNT 0x0500
#include <windows.h>
#include <process.h>
#endif

#include "base-utils.h"


#define NUM_PROCESSORS_DEFAULT 1


/*  public functions  */

gint
get_pid (void)
{
  return (gint) getpid ();
}

gint
get_number_of_processors (void)
{
  gint retval = NUM_PROCESSORS_DEFAULT;

#ifdef G_OS_UNIX
#if defined(HAVE_UNISTD_H) && defined(_SC_NPROCESSORS_ONLN)
  retval = sysconf (_SC_NPROCESSORS_ONLN);
#endif
#endif
#ifdef G_OS_WIN32
  SYSTEM_INFO system_info;

  GetSystemInfo (&system_info);

  retval = system_info.dwNumberOfProcessors;
#endif

  return retval;
}

guint64
get_physical_memory_size (void)
{
#ifdef G_OS_UNIX
#if defined(HAVE_UNISTD_H) && defined(_SC_PHYS_PAGES) && defined (_SC_PAGE_SIZE)
  return (guint64) sysconf (_SC_PHYS_PAGES) * sysconf (_SC_PAGE_SIZE);
#endif
#endif

#ifdef G_OS_WIN32
# if defined(_MSC_VER) && (_MSC_VER <= 1200)
  MEMORYSTATUS memory_status;
  memory_status.dwLength = sizeof (memory_status);

  GlobalMemoryStatus (&memory_status);
  return memory_status.dwTotalPhys;
# else
  /* requires w2k and newer SDK than provided with msvc6 */
  MEMORYSTATUSEX memory_status;

  memory_status.dwLength = sizeof (memory_status);

  if (GlobalMemoryStatusEx (&memory_status))
    return memory_status.ullTotalPhys;
# endif
#endif

  return 0;
}