| // Copyright 2021 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef SRC_DAWN_NATIVE_ASYNCTASK_H_ |
| #define SRC_DAWN_NATIVE_ASYNCTASK_H_ |
| |
| #include <functional> |
| #include <memory> |
| #include <mutex> |
| |
| #include "absl/container/flat_hash_map.h" |
| #include "dawn/common/Ref.h" |
| #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; |
| absl::flat_hash_map<WaitableTask*, Ref<WaitableTask>> mPendingTasks; |
| dawn::platform::WorkerTaskPool* mWorkerTaskPool; |
| }; |
| |
| } // namespace dawn::native |
| |
| #endif // SRC_DAWN_NATIVE_ASYNCTASK_H_ |