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physmem.c (physmem_total): Add _WIN32 support.

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2003-02-24  Danny Smith  <dannysmith@users.source.forge.net>

	* physmem.c (physmem_total): Add _WIN32 support.
	(physmem_available): Likewise.

From-SVN: r63504
This commit is contained in:
Danny Smith 2003-02-27 13:44:27 +00:00 committed by Kaveh Ghazi
parent 3894fe3207
commit ed935c3531
2 changed files with 82 additions and 0 deletions
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5
libiberty/ChangeLog
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@ -1,3 +1,8 @@
2003-02-24 Danny Smith <dannysmith@users.source.forge.net>
* physmem.c (physmem_total): Add _WIN32 support.
(physmem_available): Likewise.
2003-02-24 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* physmem.c (physmem_total) [HAVE_GETSYSINFO]: Test for

77
libiberty/physmem.c
View File

@ -56,6 +56,25 @@
# 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. */
@ -129,6 +148,35 @@ physmem_total ()
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;
}
@ -201,6 +249,35 @@ physmem_available ()
}
#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
/* Guess 25% of physical memory. */
return physmem_total () / 4;
}