cpu_info_provider.h revision bb1529ce867d8845a77ec7cdf3e3003ef1771a40
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#ifndef CHROME_BROWSER_EXTENSIONS_API_SYSTEM_CPU_CPU_INFO_PROVIDER_H_ 6#define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_CPU_CPU_INFO_PROVIDER_H_ 7 8#include "base/lazy_instance.h" 9#include "chrome/browser/extensions/api/system_info/system_info_provider.h" 10#include "chrome/common/extensions/api/system_cpu.h" 11 12namespace extensions { 13 14class CpuInfoProvider : public SystemInfoProvider { 15 public: 16 // Return the single shared instance of CpuInfoProvider. 17 static CpuInfoProvider* Get(); 18 19 const api::system_cpu::CpuInfo& cpu_info() const; 20 21 static void InitializeForTesting(scoped_refptr<CpuInfoProvider> provider); 22 23 private: 24 friend class MockCpuInfoProviderImpl; 25 26 CpuInfoProvider(); 27 virtual ~CpuInfoProvider(); 28 29 // Overriden from SystemInfoProvider. 30 virtual bool QueryInfo() OVERRIDE; 31 32 // The last information filled up by QueryInfo and is accessed on multiple 33 // threads, but the whole class is being guarded by SystemInfoProvider base 34 // class. 35 // 36 // |info_| is accessed on the UI thread while |is_waiting_for_completion_| is 37 // false and on the sequenced worker pool while |is_waiting_for_completion_| 38 // is true. 39 api::system_cpu::CpuInfo info_; 40 41 static base::LazyInstance<scoped_refptr<CpuInfoProvider> > provider_; 42 43 DISALLOW_COPY_AND_ASSIGN(CpuInfoProvider); 44}; 45 46} // namespace extensions 47 48#endif // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_CPU_CPU_INFO_PROVIDER_H_ 49