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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 03:01:46 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 03:01:46 +0000
commitf8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch)
tree26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/VBox/Runtime/r3/linux/systemmem-linux.cpp
parentInitial commit. (diff)
downloadvirtualbox-upstream.tar.xz
virtualbox-upstream.zip
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/r3/linux/systemmem-linux.cpp')
-rw-r--r--src/VBox/Runtime/r3/linux/systemmem-linux.cpp109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/linux/systemmem-linux.cpp b/src/VBox/Runtime/r3/linux/systemmem-linux.cpp
new file mode 100644
index 00000000..93bd0c0a
--- /dev/null
+++ b/src/VBox/Runtime/r3/linux/systemmem-linux.cpp
@@ -0,0 +1,109 @@
+/* $Id: systemmem-linux.cpp $ */
+/** @file
+ * IPRT - RTSystemQueryTotalRam, Linux ring-3.
+ */
+
+/*
+ * Copyright (C) 2012-2019 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/system.h>
+#include "internal/iprt.h"
+
+#include <iprt/errcore.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+/* Satisfy compiller warning */
+#define __EXPORTED_HEADERS__
+#include <sys/sysinfo.h>
+#undef __EXPORTED_HEADERS__
+
+
+RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
+{
+ AssertPtrReturn(pcb, VERR_INVALID_POINTER);
+
+ struct sysinfo info;
+ int rc = sysinfo(&info);
+ if (rc == 0)
+ {
+ *pcb = (uint64_t)info.totalram * info.mem_unit;
+ return VINF_SUCCESS;
+ }
+ return RTErrConvertFromErrno(errno);
+}
+
+
+RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
+{
+ AssertPtrReturn(pcb, VERR_INVALID_POINTER);
+
+ FILE *pFile = fopen("/proc/meminfo", "r");
+ if (pFile)
+ {
+ int rc = VERR_NOT_FOUND;
+ uint64_t cbTotal = 0;
+ uint64_t cbFree = 0;
+ uint64_t cbBuffers = 0;
+ uint64_t cbCached = 0;
+ char sz[256];
+ while (fgets(sz, sizeof(sz), pFile))
+ {
+ if (!strncmp(sz, RT_STR_TUPLE("MemTotal:")))
+ rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("MemTotal:")]), NULL, 0, &cbTotal);
+ else if (!strncmp(sz, RT_STR_TUPLE("MemFree:")))
+ rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("MemFree:")]), NULL, 0, &cbFree);
+ else if (!strncmp(sz, RT_STR_TUPLE("Buffers:")))
+ rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("Buffers:")]), NULL, 0, &cbBuffers);
+ else if (!strncmp(sz, RT_STR_TUPLE("Cached:")))
+ rc = RTStrToUInt64Ex(RTStrStripL(&sz[sizeof("Cached:")]), NULL, 0, &cbCached);
+ if (RT_FAILURE(rc))
+ break;
+ }
+ fclose(pFile);
+ if (RT_SUCCESS(rc))
+ {
+ *pcb = (cbFree + cbBuffers + cbCached) * _1K;
+ return VINF_SUCCESS;
+ }
+ }
+ /*
+ * Fallback (e.g. /proc not mapped) to sysinfo. Less accurat because there
+ * is no information about the cached memory. 'Cached:' from above is only
+ * accessible through proc :-(
+ */
+ struct sysinfo info;
+ int rc = sysinfo(&info);
+ if (rc == 0)
+ {
+ *pcb = ((uint64_t)info.freeram + info.bufferram) * info.mem_unit;
+ return VINF_SUCCESS;
+ }
+ return RTErrConvertFromErrno(errno);
+}
+