| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #ifndef GEODE_SYNCHRONIZEDQUEUE_H_ |
| #define GEODE_SYNCHRONIZEDQUEUE_H_ |
| |
| #include <condition_variable> |
| #include <deque> |
| #include <mutex> |
| |
| #include "util/Log.hpp" |
| |
| namespace apache { |
| namespace geode { |
| namespace client { |
| |
| template <class T, class _Mutex = std::mutex> |
| class ConnectionQueue { |
| public: |
| ConnectionQueue() : closed_(false) {} |
| |
| virtual ~ConnectionQueue() {} |
| |
| /** get without wait */ |
| T* getNoWait() { |
| bool isClosed; |
| return popLocked(isClosed); |
| } |
| |
| /** wait sec time until notified */ |
| T* getUntil(const std::chrono::microseconds& sec) { |
| bool isClosed; |
| auto mp = popLocked(isClosed); |
| |
| if (!mp && !isClosed) { |
| mp = getLockedFor(sec, isClosed, static_cast<void*>(nullptr)); |
| } |
| return mp; |
| } |
| |
| void put(T* mp, bool openQueue) { |
| bool delMp = false; |
| { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| { |
| if (openQueue || !closed_) { |
| queue_.push_front(mp); |
| closed_ = false; |
| } else { |
| delMp = true; |
| } |
| } |
| condition_.notify_one(); |
| } |
| if (delMp && mp) { |
| mp->close(); |
| delete mp; |
| } |
| } |
| |
| size_t size() const { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| return static_cast<uint32_t>(queue_.size()); |
| } |
| |
| bool empty() const { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| return queue_.empty(); |
| } |
| |
| void close() { |
| { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| |
| closed_ = true; |
| LOGDEBUG("Internal fair queue size while closing is %zu", queue_.size()); |
| while (!queue_.empty()) { |
| auto mp = queue_.back(); |
| queue_.pop_back(); |
| mp->close(); |
| delete mp; |
| deleteAction(); |
| } |
| } |
| LOGDEBUG("ConnectionQueue::close( ): queue closed "); |
| condition_.notify_all(); |
| } |
| |
| void reset() { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| closed_ = false; |
| } |
| |
| private: |
| std::condition_variable_any condition_; |
| bool closed_; |
| |
| T* popLocked(bool& isClosed) { |
| std::lock_guard<_Mutex> _guard(mutex_); |
| return popNoLock(isClosed); |
| } |
| |
| bool exclude(T*, void*) { return false; } |
| |
| protected: |
| std::deque<T*> queue_; |
| mutable _Mutex mutex_; |
| |
| inline T* popNoLock(bool& isClosed) { |
| T* mp = nullptr; |
| |
| isClosed = closed_; |
| if (!isClosed && queue_.size() > 0) { |
| mp = queue_.back(); |
| queue_.pop_back(); |
| } |
| return mp; |
| } |
| |
| template <typename U> |
| T* getLockedFor(const std::chrono::microseconds& duration, bool& isClosed, |
| U* excludeList = nullptr) { |
| const auto until = std::chrono::steady_clock::now() + duration; |
| T* mp = nullptr; |
| |
| std::unique_lock<_Mutex> lock(mutex_); |
| while (condition_.wait_until( |
| lock, until, [&]() { return closed_ || !queue_.empty(); })) { |
| mp = popNoLock(isClosed); |
| if (mp && excludeList) { |
| if (exclude(mp, excludeList)) { |
| mp->close(); |
| _GEODE_SAFE_DELETE(mp); |
| mp = nullptr; |
| deleteAction(); |
| continue; |
| } |
| } |
| |
| break; |
| } |
| |
| return mp; |
| } |
| |
| virtual void deleteAction() {} |
| }; |
| } // namespace client |
| } // namespace geode |
| } // namespace apache |
| |
| #endif // GEODE_SYNCHRONIZEDQUEUE_H_ |