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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_SEQUENCE_MANAGER_DELAYED_TASK_HANDLE_DELEGATE_H_
#define BASE_TASK_SEQUENCE_MANAGER_DELAYED_TASK_HANDLE_DELEGATE_H_
#include "base/containers/intrusive_heap.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/task/delayed_task_handle.h"
namespace base {
namespace sequence_manager {
namespace internal {
class TaskQueueImpl;
class DelayedTaskHandleDelegate : public DelayedTaskHandle::Delegate {
public:
explicit DelayedTaskHandleDelegate(TaskQueueImpl* outer);
DelayedTaskHandleDelegate(const DelayedTaskHandleDelegate&) = delete;
DelayedTaskHandleDelegate& operator=(const DelayedTaskHandleDelegate&) =
delete;
~DelayedTaskHandleDelegate() override;
WeakPtr<DelayedTaskHandleDelegate> AsWeakPtr();
// DelayedTaskHandle::Delegate:
bool IsValid() const override;
void CancelTask() override;
void SetHeapHandle(HeapHandle heap_handle);
void ClearHeapHandle();
HeapHandle GetHeapHandle();
// Indicates that this task will be executed. This will invalidate the handle.
void WillRunTask();
private:
// The TaskQueueImpl where the task was posted.
// RAW_PTR_EXCLUSION: Performance reasons (based on analysis of speedometer3).
RAW_PTR_EXCLUSION TaskQueueImpl* const outer_
GUARDED_BY_CONTEXT(sequence_checker_) = nullptr;
// The HeapHandle to the task, if the task is in the DelayedIncomingQueue,
// invalid otherwise.
HeapHandle heap_handle_ GUARDED_BY_CONTEXT(sequence_checker_);
SEQUENCE_CHECKER(sequence_checker_);
// Allows TaskQueueImpl to retain a weak reference to |this|. An outstanding
// weak pointer indicates that the task is valid.
WeakPtrFactory<DelayedTaskHandleDelegate> weak_ptr_factory_
GUARDED_BY_CONTEXT(sequence_checker_){this};
};
} // namespace internal
} // namespace sequence_manager
} // namespace base
#endif // BASE_TASK_SEQUENCE_MANAGER_DELAYED_TASK_HANDLE_DELEGATE_H_
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