| // 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_ |