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/* M-runtime for c++
* Copyright (C) 2005-2008 Vladimir Menshakov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "memory_info.h"
#ifdef _WINDOWS
# include <windows.h>
#else
# include <unistd.h>
#endif
using namespace mrt;
int MemoryInfo::available() {
#ifdef _WINDOWS
MEMORYSTATUS mstat;
GlobalMemoryStatus(&mstat);
return mstat.dwAvailPhys / 1048576;
#endif
#ifdef _SC_AVPHYS_PAGES
long page_size = sysconf(_SC_PAGESIZE);
if (page_size < 0)
return -1;
long pages_in_mb = 1024 * 1024 / page_size;
long mem_avail = sysconf(_SC_AVPHYS_PAGES);
if (mem_avail < 0)
return -1;
//LOG_DEBUG(("%ld pages in 1mb, available memory: %ld", pages_in_mb, mem_avail));
return mem_avail / pages_in_mb;
#endif
return -1;
}
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