src/chrome/browser/extensions/api/system_cpu/cpu_info_provider.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/extensions/api/system_cpu/cpu_info_provider.h"
   6
   7 #include "base/sys_info.h"
   8
   9 namespace extensions {
  10
  11 using api::system_cpu::CpuInfo;
  12
  13 // Static member intialization.
  14 base::LazyInstance<scoped_refptr<CpuInfoProvider> >
  15     CpuInfoProvider::provider_ = LAZY_INSTANCE_INITIALIZER;
  16
  17 CpuInfoProvider::CpuInfoProvider() {}
  18
  19 CpuInfoProvider::~CpuInfoProvider() {}
  20
  21 const CpuInfo& CpuInfoProvider::cpu_info() const {
  22   return info_;
  23 }
  24
  25 void CpuInfoProvider::InitializeForTesting(
  26     scoped_refptr<CpuInfoProvider> provider) {
  27   DCHECK(provider.get() != NULL);
  28   provider_.Get() = provider;
  29 }
  30
  31 bool CpuInfoProvider::QueryInfo() {
  32   info_.num_of_processors = base::SysInfo::NumberOfProcessors();
  33   info_.arch_name = base::SysInfo::OperatingSystemArchitecture();
  34   info_.model_name = base::SysInfo::CPUModelName();
  35   info_.features = GetFeatures();
  36
  37   info_.processors.clear();
  38   // Fill in the correct number of uninitialized ProcessorInfos.
  39   for (int i = 0; i < info_.num_of_processors; ++i) {
  40     info_.processors.push_back(linked_ptr<api::system_cpu::ProcessorInfo>(
  41         new api::system_cpu::ProcessorInfo()));
  42   }
  43   // Initialize the ProcessorInfos, or return an empty array if that fails.
  44   if (!QueryCpuTimePerProcessor(&info_.processors))
  45     info_.processors.clear();
  46   return true;
  47 }
  48
  49 std::vector<std::string> CpuInfoProvider::GetFeatures() const {
  50   std::vector<std::string> features;
  51   // These are the feature codes used by /proc/cpuinfo on Linux.
  52   if (cpu_.has_mmx()) features.push_back("mmx");
  53   if (cpu_.has_sse()) features.push_back("sse");
  54   if (cpu_.has_sse2()) features.push_back("sse2");
  55   if (cpu_.has_sse3()) features.push_back("sse3");
  56   if (cpu_.has_ssse3()) features.push_back("ssse3");
  57   if (cpu_.has_sse41()) features.push_back("sse4_1");
  58   if (cpu_.has_sse42()) features.push_back("sse4_2");
  59   if (cpu_.has_avx()) features.push_back("avx");
  60   return features;
  61 }
  62
  63 // static
  64 CpuInfoProvider* CpuInfoProvider::Get() {
  65   if (provider_.Get().get() == NULL)
  66     provider_.Get() = new CpuInfoProvider();
  67   return provider_.Get();
  68 }
  69
  70 }  // namespace extensions