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