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/* Calculate the size of physical memory. |
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Copyright 2000, 2001, 2003 Free Software Foundation, Inc. |
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This program is free software; you can redistribute it and/or modify |
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Copyright (C) 2000, 2001, 2003, 2005, 2006 Free Software |
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Foundation, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2, or (at your option) |
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any later version. |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software Foundation, |
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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/* Written by Paul Eggert. */ |
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#include "config.h" |
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#if HAVE_UNISTD_H |
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# include <unistd.h> |
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#endif |
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#include "physmem.h" |
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#include <unistd.h> |
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#if HAVE_SYS_PSTAT_H |
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# include <sys/pstat.h> |
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#endif |
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typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*); |
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#endif |
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
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/* Return the total amount of physical memory. */ |
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double |
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physmem_total () |
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physmem_total (void) |
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{ |
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#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE |
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{ /* This works on linux-gnu, solaris2 and cygwin. */ |
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size_t len = sizeof physmem; |
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static int mib[2] = { CTL_HW, HW_PHYSMEM }; |
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if (sysctl (mib, 2, &physmem, &len, NULL, 0) == 0 |
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if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0 |
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&& len == sizeof (physmem)) |
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return (double) physmem; |
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} |
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} |
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#endif |
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/* Return 0 if we can't determine the value. */ |
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return 0; |
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/* Guess 64 MB. It's probably an older host, so guess small. */ |
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return 64 * 1024 * 1024; |
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} |
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/* Return the amount of physical memory available. */ |
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double |
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physmem_available () |
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physmem_available (void) |
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{ |
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#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE |
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{ /* This works on linux-gnu, solaris2 and cygwin. */ |
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size_t len = sizeof usermem; |
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static int mib[2] = { CTL_HW, HW_USERMEM }; |
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if (sysctl (mib, 2, &usermem, &len, NULL, 0) == 0 |
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if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0 |
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&& len == sizeof (usermem)) |
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return (double) usermem; |
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} |
