extensions/browser/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 "extensions/browser/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> > CpuInfoProvider::provider_ =
  15     LAZY_INSTANCE_INITIALIZER;
  16
  17 CpuInfoProvider::CpuInfoProvider() {
  18 }
  19
  20 CpuInfoProvider::~CpuInfoProvider() {
  21 }
  22
  23 void CpuInfoProvider::InitializeForTesting(
  24     scoped_refptr<CpuInfoProvider> provider) {
  25   DCHECK(provider.get() != NULL);
  26   provider_.Get() = provider;
  27 }
  28
  29 bool CpuInfoProvider::QueryInfo() {
  30   info_.num_of_processors = base::SysInfo::NumberOfProcessors();
  31   info_.arch_name = base::SysInfo::OperatingSystemArchitecture();
  32   info_.model_name = base::SysInfo::CPUModelName();
  33   info_.features = GetFeatures();
  34
  35   info_.processors.clear();
  36   // Fill in the correct number of uninitialized ProcessorInfos.
  37   for (int i = 0; i < info_.num_of_processors; ++i) {
  38     info_.processors.push_back(linked_ptr<api::system_cpu::ProcessorInfo>(
  39         new api::system_cpu::ProcessorInfo()));
  40   }
  41   // Initialize the ProcessorInfos, or return an empty array if that fails.
  42   if (!QueryCpuTimePerProcessor(&info_.processors))
  43     info_.processors.clear();
  44   return true;
  45 }
  46
  47 std::vector<std::string> CpuInfoProvider::GetFeatures() const {
  48   std::vector<std::string> features;
  49   // These are the feature codes used by /proc/cpuinfo on Linux.
  50   if (cpu_.has_mmx())
  51     features.push_back("mmx");
  52   if (cpu_.has_sse())
  53     features.push_back("sse");
  54   if (cpu_.has_sse2())
  55     features.push_back("sse2");
  56   if (cpu_.has_sse3())
  57     features.push_back("sse3");
  58   if (cpu_.has_ssse3())
  59     features.push_back("ssse3");
  60   if (cpu_.has_sse41())
  61     features.push_back("sse4_1");
  62   if (cpu_.has_sse42())
  63     features.push_back("sse4_2");
  64   if (cpu_.has_avx())
  65     features.push_back("avx");
  66   return features;
  67 }
  68
  69 // static
  70 CpuInfoProvider* CpuInfoProvider::Get() {
  71   if (provider_.Get().get() == NULL)
  72     provider_.Get() = new CpuInfoProvider();
  73   return provider_.Get().get();
  74 }
  75
  76 }  // namespace extensions