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authorDJ Delorie <dj@redhat.com>2003-02-27 15:17:29 +0000
committerDJ Delorie <dj@redhat.com>2003-02-27 15:17:29 +0000
commitef8038066b973eed9c7fcfc963beb5d5c1b4663b (patch)
tree428c94594528c749ff0735c191c9654220028782 /libiberty/physmem.c
parentad18820186a8925ae3850e45cb83a60d67c469c7 (diff)
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merge from gcc
Diffstat (limited to 'libiberty/physmem.c')
-rw-r--r--libiberty/physmem.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/libiberty/physmem.c b/libiberty/physmem.c
index 621e281..ec5a18a 100644
--- a/libiberty/physmem.c
+++ b/libiberty/physmem.c
@@ -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;
}