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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_TASK_MANAGER_PROVIDERS_TASK_PROVIDER_OBSERVER_H_
#define CHROME_BROWSER_TASK_MANAGER_PROVIDERS_TASK_PROVIDER_OBSERVER_H_
#include "chrome/browser/task_manager/providers/task.h"
#include "chrome/browser/task_manager/task_manager_observer.h"
namespace task_manager {
// Defines an interface for observing tasks addition / removal.
class TaskProviderObserver {
public:
TaskProviderObserver() = default;
TaskProviderObserver(const TaskProviderObserver&) = delete;
TaskProviderObserver& operator=(const TaskProviderObserver&) = delete;
virtual ~TaskProviderObserver() = default;
// This notifies of the event that a new |task| has been created.
virtual void TaskAdded(Task* task) = 0;
// This notifies of the event that a |task| is about to be removed. The task
// is still valid during this call, after that it may never be used again by
// the observer and references to it must not be kept.
virtual void TaskRemoved(Task* task) = 0;
// This notifies of the event that |task| has become unresponsive. This event
// is only for tasks representing renderer processes.
virtual void TaskUnresponsive(Task* task) {}
#if BUILDFLAG(IS_CHROMEOS)
// This notifies of the event that the TaskIdsList maintained by
// GetTaskIdsList() should be invalidated.
virtual void TaskIdsListToBeInvalidated() {}
#endif
};
} // namespace task_manager
#endif // CHROME_BROWSER_TASK_MANAGER_PROVIDERS_TASK_PROVIDER_OBSERVER_H_
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