chromium/components/memory_pressure/system_memory_pressure_evaluator_linux.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/memory_pressure/system_memory_pressure_evaluator_linux.h"

#include "base/functional/bind.h"
#include "base/numerics/safe_conversions.h"
#include "base/process/process_metrics.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/task_traits.h"
#include "base/time/time.h"
#include "components/memory_pressure/multi_source_memory_pressure_monitor.h"

namespace {

constexpr int kKiBperMiB = …;

int GetAvailableSystemMemoryMiB(const base::SystemMemoryInfoKB& mem_info) { … }

}  // namespace

namespace memory_pressure {
namespace os_linux {

const base::TimeDelta SystemMemoryPressureEvaluator::kMemorySamplingPeriod = …;

const base::TimeDelta SystemMemoryPressureEvaluator::kModeratePressureCooldown = …;

const int SystemMemoryPressureEvaluator::kDefaultModerateThresholdPc = …;
const int SystemMemoryPressureEvaluator::kDefaultCriticalThresholdPc = …;

SystemMemoryPressureEvaluator::SystemMemoryPressureEvaluator(
    std::unique_ptr<MemoryPressureVoter> voter)
    : … { … }

SystemMemoryPressureEvaluator::SystemMemoryPressureEvaluator(
    int moderate_threshold_mb,
    int critical_threshold_mb,
    std::unique_ptr<MemoryPressureVoter> voter)
    : … { … }

void SystemMemoryPressureEvaluator::StartObserving() { … }

void SystemMemoryPressureEvaluator::StopObserving() { … }

bool SystemMemoryPressureEvaluator::GetSystemMemoryInfo(
    base::SystemMemoryInfoKB* mem_info) { … }

void SystemMemoryPressureEvaluator::CheckMemoryPressure() { … }

bool SystemMemoryPressureEvaluator::InferThresholds() { … }

base::MemoryPressureListener::MemoryPressureLevel
SystemMemoryPressureEvaluator::CalculateCurrentPressureLevel() { … }

}  // namespace os_linux
}  // namespace memory_pressure