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// 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.
#include "third_party/blink/renderer/controller/memory_usage_monitor.h"
#include "base/observer_list.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/platform/heap/process_heap.h"
#include "third_party/blink/renderer/platform/scheduler/public/main_thread.h"
#include "third_party/blink/renderer/platform/scheduler/public/main_thread_scheduler.h"
#include "third_party/blink/renderer/platform/wtf/allocator/partitions.h"
#include "v8/include/v8.h"
namespace blink {
namespace {
constexpr base::TimeDelta kPingInterval = base::Seconds(1);
}
MemoryUsageMonitor::MemoryUsageMonitor() {
MainThreadScheduler* scheduler =
Thread::MainThread()->Scheduler()->ToMainThreadScheduler();
DCHECK(scheduler);
timer_.SetTaskRunner(scheduler->NonWakingTaskRunner());
}
MemoryUsageMonitor::MemoryUsageMonitor(
scoped_refptr<base::SingleThreadTaskRunner> task_runner_for_testing,
const base::TickClock* clock_for_testing)
: timer_(clock_for_testing) {
timer_.SetTaskRunner(task_runner_for_testing);
}
void MemoryUsageMonitor::AddObserver(Observer* observer) {
StartMonitoringIfNeeded();
observers_.AddObserver(observer);
}
void MemoryUsageMonitor::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
bool MemoryUsageMonitor::HasObserver(Observer* observer) {
return observers_.HasObserver(observer);
}
void MemoryUsageMonitor::StartMonitoringIfNeeded() {
if (timer_.IsRunning())
return;
timer_.Start(FROM_HERE, kPingInterval,
WTF::BindRepeating(&MemoryUsageMonitor::TimerFired,
WTF::Unretained(this)));
}
void MemoryUsageMonitor::StopMonitoring() {
timer_.Stop();
}
MemoryUsage MemoryUsageMonitor::GetCurrentMemoryUsage() {
MemoryUsage usage;
GetProcessMemoryUsage(usage);
return usage;
}
void MemoryUsageMonitor::TimerFired() {
MemoryUsage usage = GetCurrentMemoryUsage();
for (auto& observer : observers_)
observer.OnMemoryPing(usage);
if (observers_.empty())
StopMonitoring();
}
} // namespace blink
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