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Diffstat (limited to 'cpp/src/qpid/sys/ConcurrentQueue.h')
-rw-r--r-- | cpp/src/qpid/sys/ConcurrentQueue.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/cpp/src/qpid/sys/ConcurrentQueue.h b/cpp/src/qpid/sys/ConcurrentQueue.h new file mode 100644 index 0000000000..dd7689666b --- /dev/null +++ b/cpp/src/qpid/sys/ConcurrentQueue.h @@ -0,0 +1,67 @@ +#ifndef QPID_SYS_CONCURRENTQUEUE_H +#define QPID_SYS_CONCURRENTQUEUE_H + +/* + * + * 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 "qpid/sys/Mutex.h" + +#include <deque> + +namespace qpid { +namespace sys { + +/** + * Thread-safe queue that allows threads to push items onto + * the queue concurrently with threads popping items off the + * queue. + */ +template <class T> class ConcurrentQueue { + public: + /** Push a data item onto the back of the queue */ + void push(const T& data) { + Mutex::ScopedLock l(lock); + queue.push_back(data); + } + + /** If the queue is non-empty, pop the front item into data and + * return true. If the queue is empty, return false + */ + bool pop(T& data) { + Mutex::ScopedLock l(lock); + if (queue.empty()) + return false; + else { + data = queue.front(); + queue.pop_front(); + return true; + } + } + + private: + Mutex lock; + std::deque<T> queue; +}; + +}} // namespace qpid::sys + + +#endif /*!QPID_SYS_CONCURRENTQUEUE_H*/ |