Lost in the matrix

C/C++/C#/Java, Multithreading

Obtenir des statistiques sur la mémoire sous windows en C/C++

Publié par Johannes
jeudi 30 juillet 2009 

#include <windows.h>

void           getMemoryUsage(unsigned long *total,
               unsigned long *avail,
               float *usage,
               unsigned long *virt_total,
               unsigned long *virt_avail)
{
   MEMORYSTATUSEX   statex;

   statex.dwLength = sizeof(statex);
   GlobalMemoryStatusEx(&statex);
   if (total != NULL) // mémoire physique totale
     *total = (unsigned long)(statex.ullTotalPhys / 1024);
   if (avail != NULL) // mémoire physique disponible
      *avail = (unsigned long)(statex.ullAvailPhys / 1024);
   if (usage != NULL) // pourcentage d'utilisation de la mémoire physique
      *usage = (float)(statex.dwMemoryLoad);
   if (virt_total != NULL) // mémoire virtuelle totale
      *virt_total = (unsigned long)(statex.ullTotalVirtual / 1024);
   if (virt_avail != NULL) // mémoire virtuelle disponible
     *virt_avail = (unsigned long)(statex.ullAvailVirtual / 1024);
}

Libellés : , ,

2 commentaires:

Laurent Lefebvre a dit…
10 janvier 2010 à 10:03  

Merci pour ce bout le code ;)
Bonne continuation Johannes

Laurent Lefebvre a dit…
27 avril 2010 à 19:58  

Pour GCC:

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*);


PFN_MS_EX pfnex;
HMODULE h = GetModuleHandle ("kernel32.dll");
if (!h)
return 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;
return static_cast(lms_ex.ullTotalPhys / 1024);
}

/* 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;
}

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