| // Copyright 2021 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SRC_DAWN_NATIVE_ASYNCTASK_H_ |
| #define SRC_DAWN_NATIVE_ASYNCTASK_H_ |
| |
| #include <functional> |
| #include <memory> |
| #include <mutex> |
| #include <unordered_map> |
| |
| #include "dawn/common/RefCounted.h" |
| |
| namespace dawn::platform { |
| class WaitableEvent; |
| class WorkerTaskPool; |
| } // namespace dawn::platform |
| |
| namespace dawn::native { |
| |
| // TODO(crbug.com/dawn/826): we'll add additional things to AsyncTask in the future, like |
| // Cancel() and RunNow(). Cancelling helps avoid running the task's body when we are just |
| // shutting down the device. RunNow() could be used for more advanced scenarios, for example |
| // always doing ShaderModule initial compilation asynchronously, but being able to steal the |
| // task if we need it for synchronous pipeline compilation. |
| using AsyncTask = std::function<void()>; |
| |
| class AsyncTaskManager { |
| public: |
| explicit AsyncTaskManager(dawn::platform::WorkerTaskPool* workerTaskPool); |
| |
| void PostTask(AsyncTask asyncTask); |
| void WaitAllPendingTasks(); |
| bool HasPendingTasks(); |
| |
| private: |
| class WaitableTask : public RefCounted { |
| public: |
| WaitableTask(); |
| ~WaitableTask() override; |
| |
| AsyncTask asyncTask; |
| AsyncTaskManager* taskManager; |
| std::unique_ptr<dawn::platform::WaitableEvent> waitableEvent; |
| }; |
| |
| static void DoWaitableTask(void* task); |
| void HandleTaskCompletion(WaitableTask* task); |
| |
| std::mutex mPendingTasksMutex; |
| std::unordered_map<WaitableTask*, Ref<WaitableTask>> mPendingTasks; |
| dawn::platform::WorkerTaskPool* mWorkerTaskPool; |
| }; |
| |
| } // namespace dawn::native |
| |
| #endif // SRC_DAWN_NATIVE_ASYNCTASK_H_ |