chromium/components/memory_pressure/multi_source_memory_pressure_monitor.h

// Copyright 2019 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_MEMORY_PRESSURE_MULTI_SOURCE_MEMORY_PRESSURE_MONITOR_H_
#define COMPONENTS_MEMORY_PRESSURE_MULTI_SOURCE_MEMORY_PRESSURE_MONITOR_H_

#include "base/memory/memory_pressure_monitor.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "components/memory_pressure/memory_pressure_level_reporter.h"
#include "components/memory_pressure/memory_pressure_voter.h"

namespace memory_pressure {

class SystemMemoryPressureEvaluator;

// This is a specialization of a MemoryPressureMonitor that relies on a set of
// MemoryPressureVoters to determine the memory pressure state. The
// MemoryPressureVoteAggregator is in charge of receiving votes from these
// voters and notifying MemoryPressureListeners of the MemoryPressureLevel via
// the monitor's |dispatch_callback_|. The pressure level is calculated as the
// most critical of all votes collected.
// This class is not thread safe and should be used from a single sequence.
class MultiSourceMemoryPressureMonitor
    : public base::MemoryPressureMonitor,
      public MemoryPressureVoteAggregator::Delegate { … };

}  // namespace memory_pressure

#endif  // COMPONENTS_MEMORY_PRESSURE_MULTI_SOURCE_MEMORY_PRESSURE_MONITOR_H_