src/extensions/browser/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 "extensions/browser/api/system_memory/memory_info_provider.h"
   6
   7 #include "base/sys_info.h"
   8
   9 namespace extensions {
  10
  11 using core_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
  20 MemoryInfoProvider::~MemoryInfoProvider() {
  21 }
  22
  23 void MemoryInfoProvider::InitializeForTesting(
  24     scoped_refptr<MemoryInfoProvider> provider) {
  25   DCHECK(provider.get() != NULL);
  26   provider_.Get() = provider;
  27 }
  28
  29 bool MemoryInfoProvider::QueryInfo() {
  30   info_.capacity = static_cast<double>(base::SysInfo::AmountOfPhysicalMemory());
  31   info_.available_capacity =
  32       static_cast<double>(base::SysInfo::AmountOfAvailablePhysicalMemory());
  33   return true;
  34 }
  35
  36 // static
  37 MemoryInfoProvider* MemoryInfoProvider::Get() {
  38   if (provider_.Get().get() == NULL)
  39     provider_.Get() = new MemoryInfoProvider();
  40   return provider_.Get().get();
  41 }
  42
  43 }  // namespace extensions