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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYSTEM_CPU_HOST_PROCESSOR_INFO_SCANNER_H_
#define COMPONENTS_SYSTEM_CPU_HOST_PROCESSOR_INFO_SCANNER_H_
#include <vector>
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "components/system_cpu/core_times.h"
namespace system_cpu {
// Parses CPU time usage stats from host_processor_info.
//
// This class is not thread-safe. Each instance must be used on the same
// sequence, which must allow blocking I/O. The constructor may be used on a
// different sequence.
class HostProcessorInfoScanner {
public:
HostProcessorInfoScanner();
~HostProcessorInfoScanner();
HostProcessorInfoScanner(const HostProcessorInfoScanner&) = delete;
HostProcessorInfoScanner& operator=(const HostProcessorInfoScanner&) = delete;
const std::vector<CoreTimes>& core_times() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return core_times_;
}
bool Update();
private:
SEQUENCE_CHECKER(sequence_checker_);
std::vector<CoreTimes> core_times_ GUARDED_BY_CONTEXT(sequence_checker_);
};
} // namespace system_cpu
#endif // COMPONENTS_SYSTEM_CPU_HOST_PROCESSOR_INFO_SCANNER_H_
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