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/* $Id: RTSystemQueryTotalRam-win.cpp $ */
/** @file
* IPRT - RTSystemQueryTotalRam, windows ring-3.
*/
/*
* Copyright (C) 2010-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/win/windows.h>
#include <iprt/system.h>
#include "internal/iprt.h"
#include <iprt/errcore.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#include "internal-r3-win.h"
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static bool volatile g_fInitialized = false;
typedef BOOL (WINAPI *PFNGLOBALMEMORYSTATUSEX)(LPMEMORYSTATUSEX);
static PFNGLOBALMEMORYSTATUSEX g_pfnGlobalMemoryStatusEx = NULL;
/**
* The GlobalMemoryStatusEx API is not available on older Windows version.
*
* @returns Pointer to GlobalMemoryStatusEx or NULL if not available.
*/
DECLINLINE(PFNGLOBALMEMORYSTATUSEX) rtSystemWinGetExApi(void)
{
PFNGLOBALMEMORYSTATUSEX pfnEx;
if (g_fInitialized)
pfnEx = g_pfnGlobalMemoryStatusEx;
else
{
pfnEx = (PFNGLOBALMEMORYSTATUSEX)GetProcAddress(g_hModKernel32, "GlobalMemoryStatusEx");
g_pfnGlobalMemoryStatusEx = pfnEx;
g_fInitialized = true;
}
return pfnEx;
}
RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
{
AssertPtrReturn(pcb, VERR_INVALID_POINTER);
int rc = VINF_SUCCESS;
PFNGLOBALMEMORYSTATUSEX pfnGlobalMemoryStatusEx = rtSystemWinGetExApi();
if (pfnGlobalMemoryStatusEx)
{
MEMORYSTATUSEX MemStatus;
MemStatus.dwLength = sizeof(MemStatus);
if (pfnGlobalMemoryStatusEx(&MemStatus))
*pcb = MemStatus.ullTotalPhys;
else
rc = RTErrConvertFromWin32(GetLastError());
}
else
{
MEMORYSTATUS MemStatus;
RT_ZERO(MemStatus);
MemStatus.dwLength = sizeof(MemStatus);
GlobalMemoryStatus(&MemStatus);
*pcb = MemStatus.dwTotalPhys;
}
return rc;
}
RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
{
AssertPtrReturn(pcb, VERR_INVALID_POINTER);
int rc = VINF_SUCCESS;
PFNGLOBALMEMORYSTATUSEX pfnGlobalMemoryStatusEx = rtSystemWinGetExApi();
if (pfnGlobalMemoryStatusEx)
{
MEMORYSTATUSEX MemStatus;
MemStatus.dwLength = sizeof(MemStatus);
if (pfnGlobalMemoryStatusEx(&MemStatus))
*pcb = MemStatus.ullAvailPhys;
else
rc = RTErrConvertFromWin32(GetLastError());
}
else
{
MEMORYSTATUS MemStatus;
RT_ZERO(MemStatus);
MemStatus.dwLength = sizeof(MemStatus);
GlobalMemoryStatus(&MemStatus);
*pcb = MemStatus.dwAvailPhys;
}
return rc;
}
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