| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 "arrow/util/mutex.h" |
| |
| #include <mutex> |
| |
| #include "arrow/util/logging.h" |
| |
| namespace arrow { |
| namespace util { |
| |
| struct Mutex::Impl { |
| std::mutex mutex_; |
| }; |
| |
| Mutex::Guard::Guard(Mutex* locked) |
| : locked_(locked, [](Mutex* locked) { |
| DCHECK(!locked->impl_->mutex_.try_lock()); |
| locked->impl_->mutex_.unlock(); |
| }) {} |
| |
| Mutex::Guard Mutex::TryLock() { |
| DCHECK_NE(impl_, nullptr); |
| if (impl_->mutex_.try_lock()) { |
| return Guard{this}; |
| } |
| return Guard{}; |
| } |
| |
| Mutex::Guard Mutex::Lock() { |
| DCHECK_NE(impl_, nullptr); |
| impl_->mutex_.lock(); |
| return Guard{this}; |
| } |
| |
| Mutex::Mutex() : impl_(new Impl, [](Impl* impl) { delete impl; }) {} |
| |
| } // namespace util |
| } // namespace arrow |