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// 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_CONTEXT_LIFECYCLE_NOTIFIER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_CONTEXT_LIFECYCLE_NOTIFIER_H_
#include "base/dcheck_is_on.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap_observer_list.h"
namespace blink {
class ContextLifecycleObserver;
// Notifier interface for ContextLifecycleObserver.
class PLATFORM_EXPORT ContextLifecycleNotifier : public GarbageCollectedMixin {
public:
virtual ~ContextLifecycleNotifier();
void AddContextLifecycleObserver(ContextLifecycleObserver*);
void RemoveContextLifecycleObserver(ContextLifecycleObserver*);
void Trace(Visitor* visitor) const override;
bool IsContextDestroyed() const;
protected:
// Should be called by implementers to notify observers when the context is
// destroyed.
void NotifyContextDestroyed();
const HeapObserverList<ContextLifecycleObserver>& observers() const {
return observers_;
}
HeapObserverList<ContextLifecycleObserver>& observers() { return observers_; }
private:
HeapObserverList<ContextLifecycleObserver> observers_;
bool context_destroyed_ = false;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_CONTEXT_LIFECYCLE_NOTIFIER_H_
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