| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef EXTENSIONS_BROWSER_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |
| #define EXTENSIONS_BROWSER_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |
| |
| #include "base/lazy_instance.h" |
| #include "extensions/browser/api/system_info/system_info_provider.h" |
| #include "extensions/common/api/system_memory.h" |
| |
| namespace extensions { |
| |
| class MemoryInfoProvider : public SystemInfoProvider { |
| public: |
| static MemoryInfoProvider* Get(); |
| |
| const core_api::system_memory::MemoryInfo& memory_info() const { |
| return info_; |
| } |
| |
| static void InitializeForTesting(scoped_refptr<MemoryInfoProvider> provider); |
| |
| private: |
| friend class MockMemoryInfoProviderImpl; |
| |
| MemoryInfoProvider(); |
| ~MemoryInfoProvider() override; |
| |
| // Overriden from SystemInfoProvider. |
| bool QueryInfo() override; |
| |
| // The last information filled up by QueryInfo and is accessed on multiple |
| // threads, but the whole class is being guarded by SystemInfoProvider base |
| // class. |
| // |
| // |info_| is accessed on the UI thread while |is_waiting_for_completion_| is |
| // false and on the sequenced worker pool while |is_waiting_for_completion_| |
| // is true. |
| core_api::system_memory::MemoryInfo info_; |
| |
| static base::LazyInstance<scoped_refptr<MemoryInfoProvider> > provider_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MemoryInfoProvider); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_BROWSER_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |