| // 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. |
| |
| #include "dawn/platform/WorkerThread.h" |
| |
| #include <condition_variable> |
| #include <functional> |
| #include <thread> |
| |
| #include "dawn/common/Assert.h" |
| |
| namespace { |
| |
| class AsyncWaitableEventImpl { |
| public: |
| AsyncWaitableEventImpl() : mIsComplete(false) {} |
| |
| void Wait() { |
| std::unique_lock<std::mutex> lock(mMutex); |
| mCondition.wait(lock, [this] { return mIsComplete; }); |
| } |
| |
| bool IsComplete() { |
| std::lock_guard<std::mutex> lock(mMutex); |
| return mIsComplete; |
| } |
| |
| void MarkAsComplete() { |
| { |
| std::lock_guard<std::mutex> lock(mMutex); |
| mIsComplete = true; |
| } |
| mCondition.notify_all(); |
| } |
| |
| private: |
| std::mutex mMutex; |
| std::condition_variable mCondition; |
| bool mIsComplete; |
| }; |
| |
| class AsyncWaitableEvent final : public dawn::platform::WaitableEvent { |
| public: |
| AsyncWaitableEvent() : mWaitableEventImpl(std::make_shared<AsyncWaitableEventImpl>()) {} |
| |
| void Wait() override { mWaitableEventImpl->Wait(); } |
| |
| bool IsComplete() override { return mWaitableEventImpl->IsComplete(); } |
| |
| std::shared_ptr<AsyncWaitableEventImpl> GetWaitableEventImpl() const { |
| return mWaitableEventImpl; |
| } |
| |
| private: |
| std::shared_ptr<AsyncWaitableEventImpl> mWaitableEventImpl; |
| }; |
| |
| } // anonymous namespace |
| |
| namespace dawn::platform { |
| |
| std::unique_ptr<dawn::platform::WaitableEvent> AsyncWorkerThreadPool::PostWorkerTask( |
| dawn::platform::PostWorkerTaskCallback callback, |
| void* userdata) { |
| std::unique_ptr<AsyncWaitableEvent> waitableEvent = std::make_unique<AsyncWaitableEvent>(); |
| |
| std::function<void()> doTask = [callback, userdata, |
| waitableEventImpl = waitableEvent->GetWaitableEventImpl()] { |
| callback(userdata); |
| waitableEventImpl->MarkAsComplete(); |
| }; |
| |
| std::thread thread(doTask); |
| thread.detach(); |
| |
| return waitableEvent; |
| } |
| |
| } // namespace dawn::platform |