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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TASK_DEFAULT_DELAYED_TASK_HANDLE_DELEGATE_H_
#define BASE_TASK_DEFAULT_DELAYED_TASK_HANDLE_DELEGATE_H_
#include "base/base_export.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/task/delayed_task_handle.h"
namespace base {
// A default implementation of DelayedTaskHandle::Delegate that can cancel the
// delayed task by invalidating a weak pointer.
class BASE_EXPORT DefaultDelayedTaskHandleDelegate
: public DelayedTaskHandle::Delegate {
public:
DefaultDelayedTaskHandleDelegate();
~DefaultDelayedTaskHandleDelegate() override;
// DelayedTaskHandle::Delegate:
bool IsValid() const override;
void CancelTask() override;
// Returns a new callback bound to this object such that it can be cancelled
// by invalidating |weak_ptr_factory_|.
OnceClosure BindCallback(OnceClosure callback);
private:
// Runs |callback|.
void RunTask(OnceClosure callback);
WeakPtrFactory<DefaultDelayedTaskHandleDelegate> weak_ptr_factory_{this};
};
} // namespace base
#endif // BASE_TASK_DEFAULT_DELAYED_TASK_HANDLE_DELEGATE_H_