/* Calculate the size of physical memory.
- Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2000-2019 Free Software Foundation, Inc.
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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Paul Eggert. */
# include <sys/systemcfg.h>
#endif
+#ifdef _WIN32
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* MEMORYSTATUSEX is missing from older windows headers, so define
+ a local replacement. */
+typedef struct
+{
+ DWORD dwLength;
+ DWORD dwMemoryLoad;
+ DWORDLONG ullTotalPhys;
+ DWORDLONG ullAvailPhys;
+ DWORDLONG ullTotalPageFile;
+ DWORDLONG ullAvailPageFile;
+ DWORDLONG ullTotalVirtual;
+ DWORDLONG ullAvailVirtual;
+ DWORDLONG ullAvailExtendedVirtual;
+} lMEMORYSTATUSEX;
+typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
+#endif
+
#include "libiberty.h"
/* Return the total amount of physical memory. */
double
-physmem_total ()
+physmem_total (void)
{
#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
- {
+ { /* This works on linux-gnu, solaris2 and cygwin. */
double pages = sysconf (_SC_PHYS_PAGES);
double pagesize = sysconf (_SC_PAGESIZE);
if (0 <= pages && 0 <= pagesize)
double pagesize = sysconf (_SC_PAGESIZE);
double pages = realmem.physmem;
if (0 <= pages && 0 <= pagesize)
- return pages * pagesize;
+ return pages * pagesize;
}
}
#endif
-#if HAVE_GETSYSINFO
+#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
{ /* This works on Tru64 UNIX V4/5. */
int physmem;
#if HAVE_SYSCTL && defined HW_PHYSMEM
{ /* This works on *bsd and darwin. */
unsigned int physmem;
- size_t len = sizeof(physmem);
- static int mib[2] = {CTL_HW, HW_PHYSMEM};
+ size_t len = sizeof physmem;
+ static int mib[2] = { CTL_HW, HW_PHYSMEM };
- if (sysctl(mib, ARRAY_SIZE(mib), &physmem, &len, NULL, 0) == 0
+ if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
&& len == sizeof (physmem))
- return (double)physmem;
+ return (double) physmem;
}
#endif
#if HAVE__SYSTEM_CONFIGURATION
- /* This works on AIX. */
+ /* This works on AIX 4.3.3+. */
return _system_configuration.physmem;
#endif
+#if defined _WIN32
+ { /* this works on windows */
+ PFN_MS_EX pfnex;
+ HMODULE h = GetModuleHandle ("kernel32.dll");
+
+ if (!h)
+ return 0.0;
+
+ /* Use GlobalMemoryStatusEx if available. */
+ if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
+ {
+ lMEMORYSTATUSEX lms_ex;
+ lms_ex.dwLength = sizeof lms_ex;
+ if (!pfnex (&lms_ex))
+ return 0.0;
+ return (double) lms_ex.ullTotalPhys;
+ }
+
+ /* Fall back to GlobalMemoryStatus which is always available.
+ but returns wrong results for physical memory > 4GB. */
+ else
+ {
+ MEMORYSTATUS ms;
+ GlobalMemoryStatus (&ms);
+ return (double) ms.dwTotalPhys;
+ }
+ }
+#endif
+
/* Return 0 if we can't determine the value. */
return 0;
}
/* Return the amount of physical memory available. */
double
-physmem_available ()
+physmem_available (void)
{
#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
- {
+ { /* This works on linux-gnu, solaris2 and cygwin. */
double pages = sysconf (_SC_AVPHYS_PAGES);
double pagesize = sysconf (_SC_PAGESIZE);
if (0 <= pages && 0 <= pagesize)
double pagesize = sysconf (_SC_PAGESIZE);
double pages = realmem.availrmem;
if (0 <= pages && 0 <= pagesize)
- return pages * pagesize;
+ return pages * pagesize;
}
}
#endif
-#if HAVE_TABLE && HAVE_SYS_TABLE_H
+#if HAVE_TABLE && defined TBL_VMSTATS
{ /* This works on Tru64 UNIX V4/5. */
struct tbl_vmstats vmstats;
#if HAVE_SYSCTL && defined HW_USERMEM
{ /* This works on *bsd and darwin. */
unsigned int usermem;
- size_t len = sizeof(usermem);
- static int mib[2] = {CTL_HW, HW_USERMEM};
+ size_t len = sizeof usermem;
+ static int mib[2] = { CTL_HW, HW_USERMEM };
- if (sysctl(mib, ARRAY_SIZE(mib), &usermem, &len, NULL, 0) == 0
+ if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
&& len == sizeof (usermem))
- return (double)usermem;
+ return (double) usermem;
+ }
+#endif
+
+#if defined _WIN32
+ { /* this works on windows */
+ PFN_MS_EX pfnex;
+ HMODULE h = GetModuleHandle ("kernel32.dll");
+
+ if (!h)
+ return 0.0;
+
+ /* Use GlobalMemoryStatusEx if available. */
+ if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
+ {
+ lMEMORYSTATUSEX lms_ex;
+ lms_ex.dwLength = sizeof lms_ex;
+ if (!pfnex (&lms_ex))
+ return 0.0;
+ return (double) lms_ex.ullAvailPhys;
+ }
+
+ /* Fall back to GlobalMemoryStatus which is always available.
+ but returns wrong results for physical memory > 4GB */
+ else
+ {
+ MEMORYSTATUS ms;
+ GlobalMemoryStatus (&ms);
+ return (double) ms.dwAvailPhys;
+ }
}
#endif
# include <stdlib.h>
int
-main ()
+main (void)
{
printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
exit (0);