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// Copyright 2013 The Chromium Authors
// 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_CPU_CPU_INFO_PROVIDER_H_
#define EXTENSIONS_BROWSER_API_SYSTEM_CPU_CPU_INFO_PROVIDER_H_
#include <vector>
#include "base/lazy_instance.h"
#include "build/build_config.h"
#include "extensions/browser/api/system_info/system_info_provider.h"
#include "extensions/common/api/system_cpu.h"
#if defined(ARCH_CPU_X86_FAMILY)
#include "base/cpu.h"
#endif
namespace extensions {
class CpuInfoProvider : public SystemInfoProvider {
public:
CpuInfoProvider(const CpuInfoProvider&) = delete;
CpuInfoProvider& operator=(const CpuInfoProvider&) = delete;
// Return the single shared instance of CpuInfoProvider.
static CpuInfoProvider* Get();
const api::system_cpu::CpuInfo& cpu_info() const { return info_; }
static void InitializeForTesting(scoped_refptr<CpuInfoProvider> provider);
private:
friend class MockCpuInfoProviderImpl;
CpuInfoProvider();
~CpuInfoProvider() override;
// Platform specific implementation for querying the CPU time information
// for each processor.
virtual bool QueryCpuTimePerProcessor(
std::vector<api::system_cpu::ProcessorInfo>* infos);
// Overriden from SystemInfoProvider.
bool QueryInfo() override;
// Creates a list of codenames for currently active features.
std::vector<std::string> GetFeatures() const;
// 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.
api::system_cpu::CpuInfo info_;
static base::LazyInstance<scoped_refptr<CpuInfoProvider>>::DestructorAtExit
provider_;
#if defined(ARCH_CPU_X86_FAMILY)
base::CPU cpu_;
#endif
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_SYSTEM_CPU_CPU_INFO_PROVIDER_H_
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