chromium/services/device/compute_pressure/cpu_probe_manager.h

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_DEVICE_COMPUTE_PRESSURE_CPU_PROBE_MANAGER_H_
#define SERVICES_DEVICE_COMPUTE_PRESSURE_CPU_PROBE_MANAGER_H_

#include <memory>

#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "components/system_cpu/cpu_sample.h"
#include "services/device/public/mojom/pressure_update.mojom-shared.h"

namespace system_cpu {
class CpuProbe;
}

namespace device {

// Interface for retrieving the compute pressure state for CPU from the
// underlying OS at regular intervals.
//
// This class uses system_cpu::CpuProbe to get CPU samples. Instances maintain a
// CpuProbe and a timer, so that at each time interval CpuProbe::RequestSample
// is called to get the CPU pressure state since the last sample.
//
// Instances are not thread-safe and should be used on the same sequence.
//
// The instance is owned by a PressureManagerImpl.
class CpuProbeManager { … };

}  // namespace device

#endif  // SERVICES_DEVICE_COMPUTE_PRESSURE_CPU_PROBE_MANAGER_H_