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robert.nagy@gmail.comea54e462011-10-25 07:05:27 +09001// Copyright (c) 2011 The Chromium Authors. All rights reserved.
evan@chromium.orgfae72682009-11-24 06:57:11 +09002// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/sys_info.h"
6
robert.nagy@gmail.comea54e462011-10-25 07:05:27 +09007#include <limits>
8
brettw@chromium.org01f3da42014-08-14 05:22:14 +09009#include "base/files/file_util.h"
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090010#include "base/lazy_instance.h"
evan@chromium.orgfae72682009-11-24 06:57:11 +090011#include "base/logging.h"
ljagielski8af7af72015-04-14 22:45:42 +090012#include "base/numerics/safe_conversions.h"
brettw@chromium.orgabcde5c2013-02-07 11:57:22 +090013#include "base/strings/string_number_conversions.h"
jochen@chromium.org4abdb3e2013-11-20 20:14:51 +090014#include "base/sys_info_internal.h"
evan@chromium.orgfae72682009-11-24 06:57:11 +090015
mdempsky@google.com92721502013-04-10 11:22:15 +090016namespace {
evan@chromium.orgfae72682009-11-24 06:57:11 +090017
mdempsky@google.com92721502013-04-10 11:22:15 +090018int64 AmountOfMemory(int pages_name) {
19 long pages = sysconf(pages_name);
20 long page_size = sysconf(_SC_PAGESIZE);
evan@chromium.orgfae72682009-11-24 06:57:11 +090021 if (pages == -1 || page_size == -1) {
22 NOTREACHED();
23 return 0;
24 }
evan@chromium.orgfae72682009-11-24 06:57:11 +090025 return static_cast<int64>(pages) * page_size;
26}
27
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090028int64 AmountOfPhysicalMemory() {
29 return AmountOfMemory(_SC_PHYS_PAGES);
30}
31
ljagielski8af7af72015-04-14 22:45:42 +090032uint64 MaxSharedMemorySize() {
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090033 std::string contents;
34 base::ReadFileToString(base::FilePath("/proc/sys/kernel/shmmax"), &contents);
35 DCHECK(!contents.empty());
36 if (!contents.empty() && contents[contents.length() - 1] == '\n') {
37 contents.erase(contents.length() - 1);
38 }
39
brettw@chromium.org5acbd2d2014-08-16 01:25:18 +090040 uint64 limit;
41 if (!base::StringToUint64(contents, &limit)) {
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090042 limit = 0;
43 }
danakja7ea6662015-03-10 07:27:25 +090044 DCHECK_GT(limit, 0u);
ljagielski8af7af72015-04-14 22:45:42 +090045 return limit;
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090046}
47
jochen@chromium.org4abdb3e2013-11-20 20:14:51 +090048base::LazyInstance<
49 base::internal::LazySysInfoValue<int64, AmountOfPhysicalMemory> >::Leaky
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090050 g_lazy_physical_memory = LAZY_INSTANCE_INITIALIZER;
jochen@chromium.org4abdb3e2013-11-20 20:14:51 +090051base::LazyInstance<
ljagielski8af7af72015-04-14 22:45:42 +090052 base::internal::LazySysInfoValue<uint64, MaxSharedMemorySize> >::Leaky
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090053 g_lazy_max_shared_memory = LAZY_INSTANCE_INITIALIZER;
54
dglazkov@chromium.org69cd2b52013-10-30 05:14:54 +090055} // namespace
rmcilroy@chromium.org75d0ba22013-10-30 04:32:45 +090056
dglazkov@chromium.org69cd2b52013-10-30 05:14:54 +090057namespace base {
58
59// static
dglazkov@chromium.org69cd2b52013-10-30 05:14:54 +090060int64 SysInfo::AmountOfAvailablePhysicalMemory() {
61 return AmountOfMemory(_SC_AVPHYS_PAGES);
62}
63
64// static
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090065int64 SysInfo::AmountOfPhysicalMemory() {
66 return g_lazy_physical_memory.Get().value();
67}
68
69// static
ljagielski8af7af72015-04-14 22:45:42 +090070uint64 SysInfo::MaxSharedMemorySize() {
rmcilroy@chromium.orge6d35102013-11-05 05:50:14 +090071 return g_lazy_max_shared_memory.Get().value();
evan@chromium.orgfae72682009-11-24 06:57:11 +090072}
73
dglazkov@chromium.org69cd2b52013-10-30 05:14:54 +090074// static
75std::string SysInfo::CPUModelName() {
zelidrag@chromium.orgcedb2672013-05-06 14:35:27 +090076#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
77 const char kCpuModelPrefix[] = "Hardware";
78#else
79 const char kCpuModelPrefix[] = "model name";
80#endif
hongbo.min@intel.com893f7d62012-09-08 18:53:01 +090081 std::string contents;
dglazkov@chromium.org69cd2b52013-10-30 05:14:54 +090082 ReadFileToString(FilePath("/proc/cpuinfo"), &contents);
hongbo.min@intel.com893f7d62012-09-08 18:53:01 +090083 DCHECK(!contents.empty());
84 if (!contents.empty()) {
85 std::istringstream iss(contents);
86 std::string line;
zelidrag@chromium.orgcedb2672013-05-06 14:35:27 +090087 while (std::getline(iss, line)) {
88 if (line.compare(0, strlen(kCpuModelPrefix), kCpuModelPrefix) == 0) {
hongbo.min@intel.com893f7d62012-09-08 18:53:01 +090089 size_t pos = line.find(": ");
90 return line.substr(pos + 2);
91 }
92 }
93 }
94 return std::string();
95}
96
evan@chromium.orgfae72682009-11-24 06:57:11 +090097} // namespace base