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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.
#include "chrome/browser/ash/arc/idle_manager/arc_cpu_throttle_observer.h"
#include "chrome/browser/ash/arc/instance_throttle/arc_instance_throttle.h"
namespace arc {
ArcCpuThrottleObserver::ArcCpuThrottleObserver()
: ThrottleObserver(kArcCpuThrottleObserverName) {}
void ArcCpuThrottleObserver::StartObserving(
content::BrowserContext* context,
const ObserverStateChangedCallback& callback) {
ThrottleObserver::StartObserving(context, callback);
auto* const instance_throttle =
arc::ArcInstanceThrottle::GetForBrowserContext(context);
// This may be null in unit tests.
if (instance_throttle) {
instance_throttle->AddServiceObserver(this);
// Align internal state with that of the underlying service.
OnThrottle(instance_throttle->should_throttle());
}
}
void ArcCpuThrottleObserver::StopObserving() {
auto* const instance_throttle =
arc::ArcInstanceThrottle::GetForBrowserContext(context());
// This may be null in unit tests.
if (instance_throttle)
instance_throttle->RemoveServiceObserver(this);
ThrottleObserver::StopObserving();
}
void ArcCpuThrottleObserver::OnThrottle(bool throttled) {
// The role of the observer is to vote "true" as a means to halt throttling on
// the parent service. For that reason, it the negative version of the
// _throttled_ flag managed by the service we are watching.
SetActive(!throttled);
}
} // namespace arc
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