| // 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. |
| |
| #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 |