VirtualBox

source: vbox/trunk/src/VBox/Runtime/r3/win/RTSystemQueryTotalRam-win.cpp@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: RTSystemQueryTotalRam-win.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - RTSystemQueryTotalRam, windows ring-3.
4 */
5
6/*
7 * Copyright (C) 2010-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include <iprt/win/windows.h>
42#include <iprt/system.h>
43#include "internal/iprt.h"
44
45#include <iprt/errcore.h>
46#include <iprt/assert.h>
47#include <iprt/string.h>
48
49#include "internal-r3-win.h"
50
51
52/*********************************************************************************************************************************
53* Global Variables *
54*********************************************************************************************************************************/
55static bool volatile g_fInitialized = false;
56typedef BOOL (WINAPI *PFNGLOBALMEMORYSTATUSEX)(LPMEMORYSTATUSEX);
57static PFNGLOBALMEMORYSTATUSEX g_pfnGlobalMemoryStatusEx = NULL;
58
59
60/**
61 * The GlobalMemoryStatusEx API is not available on older Windows version.
62 *
63 * @returns Pointer to GlobalMemoryStatusEx or NULL if not available.
64 */
65DECLINLINE(PFNGLOBALMEMORYSTATUSEX) rtSystemWinGetExApi(void)
66{
67 PFNGLOBALMEMORYSTATUSEX pfnEx;
68 if (g_fInitialized)
69 pfnEx = g_pfnGlobalMemoryStatusEx;
70 else
71 {
72 pfnEx = (PFNGLOBALMEMORYSTATUSEX)GetProcAddress(g_hModKernel32, "GlobalMemoryStatusEx");
73 g_pfnGlobalMemoryStatusEx = pfnEx;
74 g_fInitialized = true;
75 }
76 return pfnEx;
77}
78
79
80RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
81{
82 AssertPtrReturn(pcb, VERR_INVALID_POINTER);
83
84 int rc = VINF_SUCCESS;
85 PFNGLOBALMEMORYSTATUSEX pfnGlobalMemoryStatusEx = rtSystemWinGetExApi();
86 if (pfnGlobalMemoryStatusEx)
87 {
88 MEMORYSTATUSEX MemStatus;
89 MemStatus.dwLength = sizeof(MemStatus);
90 if (pfnGlobalMemoryStatusEx(&MemStatus))
91 *pcb = MemStatus.ullTotalPhys;
92 else
93 rc = RTErrConvertFromWin32(GetLastError());
94 }
95 else
96 {
97 MEMORYSTATUS MemStatus;
98 RT_ZERO(MemStatus);
99 MemStatus.dwLength = sizeof(MemStatus);
100 GlobalMemoryStatus(&MemStatus);
101 *pcb = MemStatus.dwTotalPhys;
102 }
103 return rc;
104}
105
106
107RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
108{
109 AssertPtrReturn(pcb, VERR_INVALID_POINTER);
110
111 int rc = VINF_SUCCESS;
112 PFNGLOBALMEMORYSTATUSEX pfnGlobalMemoryStatusEx = rtSystemWinGetExApi();
113 if (pfnGlobalMemoryStatusEx)
114 {
115 MEMORYSTATUSEX MemStatus;
116 MemStatus.dwLength = sizeof(MemStatus);
117 if (pfnGlobalMemoryStatusEx(&MemStatus))
118 *pcb = MemStatus.ullAvailPhys;
119 else
120 rc = RTErrConvertFromWin32(GetLastError());
121 }
122 else
123 {
124 MEMORYSTATUS MemStatus;
125 RT_ZERO(MemStatus);
126 MemStatus.dwLength = sizeof(MemStatus);
127 GlobalMemoryStatus(&MemStatus);
128 *pcb = MemStatus.dwAvailPhys;
129 }
130 return rc;
131}
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