src/chrome/browser/extensions/api/system_memory/memory_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_memory/memory_info_provider.h"
   6
   7 #include "base/sys_info.h"
   8
   9 namespace extensions {
  10
  11 using api::system_memory::MemoryInfo;
  12
  13 // Static member intialization.
  14 base::LazyInstance<scoped_refptr<MemoryInfoProvider> >
  15     MemoryInfoProvider::provider_ = LAZY_INSTANCE_INITIALIZER;
  16
  17 MemoryInfoProvider::MemoryInfoProvider() {}
  18
  19 MemoryInfoProvider::~MemoryInfoProvider() {}
  20
  21 const MemoryInfo& MemoryInfoProvider::memory_info() const {
  22   return info_;
  23 }
  24
  25 void MemoryInfoProvider::InitializeForTesting(
  26     scoped_refptr<MemoryInfoProvider> provider) {
  27   DCHECK(provider.get() != NULL);
  28   provider_.Get() = provider;
  29 }
  30
  31 bool MemoryInfoProvider::QueryInfo() {
  32   info_.capacity = static_cast<double>(base::SysInfo::AmountOfPhysicalMemory());
  33   info_.available_capacity =
  34       static_cast<double>(base::SysInfo::AmountOfAvailablePhysicalMemory());
  35   return true;
  36 }
  37
  38 // static
  39 MemoryInfoProvider* MemoryInfoProvider::Get() {
  40   if (provider_.Get().get() == NULL)
  41     provider_.Get() = new MemoryInfoProvider();
  42   return provider_.Get();
  43 }
  44
  45 }  // namespace extensions