| 1 | /* $Id: systemmem-linux.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - RTSystemQueryTotalRam, Linux ring-3.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2012-2024 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/system.h>
|
|---|
| 42 | #include "internal/iprt.h"
|
|---|
| 43 |
|
|---|
| 44 | #include <iprt/errcore.h>
|
|---|
| 45 | #include <iprt/assert.h>
|
|---|
| 46 | #include <iprt/string.h>
|
|---|
| 47 |
|
|---|
| 48 | #include <stdio.h>
|
|---|
| 49 | #include <errno.h>
|
|---|
| 50 |
|
|---|
| 51 | /* Satisfy compiller warning */
|
|---|
| 52 | #define __EXPORTED_HEADERS__
|
|---|
| 53 | #include <sys/sysinfo.h>
|
|---|
| 54 | #undef __EXPORTED_HEADERS__
|
|---|
| 55 |
|
|---|
| 56 |
|
|---|
| 57 | RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
|
|---|
| 58 | {
|
|---|
| 59 | AssertPtrReturn(pcb, VERR_INVALID_POINTER);
|
|---|
| 60 |
|
|---|
| 61 | struct sysinfo info;
|
|---|
| 62 | int rc = sysinfo(&info);
|
|---|
| 63 | if (rc == 0)
|
|---|
| 64 | {
|
|---|
| 65 | *pcb = (uint64_t)info.totalram * info.mem_unit;
|
|---|
| 66 | return VINF_SUCCESS;
|
|---|
| 67 | }
|
|---|
| 68 | return RTErrConvertFromErrno(errno);
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 |
|
|---|
| 72 | RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
|
|---|
| 73 | {
|
|---|
| 74 | AssertPtrReturn(pcb, VERR_INVALID_POINTER);
|
|---|
| 75 |
|
|---|
| 76 | FILE *pFile = fopen("/proc/meminfo", "r");
|
|---|
| 77 | if (pFile)
|
|---|
| 78 | {
|
|---|
| 79 | int rc = VERR_NOT_FOUND;
|
|---|
| 80 | uint64_t cbTotal = 0;
|
|---|
| 81 | uint64_t cbFree = 0;
|
|---|
| 82 | uint64_t cbBuffers = 0;
|
|---|
| 83 | uint64_t cbCached = 0;
|
|---|
| 84 | char sz[256];
|
|---|
| 85 | while (fgets(sz, sizeof(sz), pFile))
|
|---|
| 86 | {
|
|---|
| 87 | if (!strncmp(sz, RT_STR_TUPLE("MemTotal:")))
|
|---|
| 88 | rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("MemTotal:")]), NULL, 0, &cbTotal);
|
|---|
| 89 | else if (!strncmp(sz, RT_STR_TUPLE("MemFree:")))
|
|---|
| 90 | rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("MemFree:")]), NULL, 0, &cbFree);
|
|---|
| 91 | else if (!strncmp(sz, RT_STR_TUPLE("Buffers:")))
|
|---|
| 92 | rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("Buffers:")]), NULL, 0, &cbBuffers);
|
|---|
| 93 | else if (!strncmp(sz, RT_STR_TUPLE("Cached:")))
|
|---|
| 94 | rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("Cached:")]), NULL, 0, &cbCached);
|
|---|
| 95 | if (RT_FAILURE(rc))
|
|---|
| 96 | break;
|
|---|
| 97 | }
|
|---|
| 98 | fclose(pFile);
|
|---|
| 99 | if (RT_SUCCESS(rc))
|
|---|
| 100 | {
|
|---|
| 101 | *pcb = (cbFree + cbBuffers + cbCached) * _1K;
|
|---|
| 102 | return VINF_SUCCESS;
|
|---|
| 103 | }
|
|---|
| 104 | }
|
|---|
| 105 | /*
|
|---|
| 106 | * Fallback (e.g. /proc not mapped) to sysinfo. Less accurat because there
|
|---|
| 107 | * is no information about the cached memory. 'Cached:' from above is only
|
|---|
| 108 | * accessible through proc :-(
|
|---|
| 109 | */
|
|---|
| 110 | struct sysinfo info;
|
|---|
| 111 | int rc = sysinfo(&info);
|
|---|
| 112 | if (rc == 0)
|
|---|
| 113 | {
|
|---|
| 114 | *pcb = ((uint64_t)info.freeram + info.bufferram) * info.mem_unit;
|
|---|
| 115 | return VINF_SUCCESS;
|
|---|
| 116 | }
|
|---|
| 117 | return RTErrConvertFromErrno(errno);
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
