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File: [Pegasus] / pegasus / src / Pegasus / Common / AsyncQueue.h
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Revision: 1.10, Tue Dec 2 09:00:41 2008 UTC (15 years, 7 months ago) by martin Branch: MAIN CVS Tags: preBug9676, postBug9676, TASK_PEP317_1JUNE_2013, TASK-TASK_PEP362_RestfulService_branch-root, TASK-TASK_PEP362_RestfulService_branch-merged_out_from_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_to_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_from_branch, TASK-TASK_PEP362_RestfulService_branch-branch, TASK-PEP362_RestfulService-root, TASK-PEP362_RestfulService-merged_out_to_branch, TASK-PEP362_RestfulService-merged_out_from_trunk, TASK-PEP362_RestfulService-merged_in_to_trunk, TASK-PEP362_RestfulService-merged_in_from_branch, TASK-PEP362_RestfulService-branch, TASK-PEP348_SCMO-root, TASK-PEP348_SCMO-merged_out_to_branch, TASK-PEP348_SCMO-merged_out_from_trunk, TASK-PEP348_SCMO-merged_in_to_trunk, TASK-PEP348_SCMO-merged_in_from_branch, TASK-PEP348_SCMO-branch, TASK-PEP317_pullop-root, TASK-PEP317_pullop-merged_out_to_branch, TASK-PEP317_pullop-merged_out_from_trunk, TASK-PEP317_pullop-merged_in_to_trunk, TASK-PEP317_pullop-merged_in_from_branch, TASK-PEP317_pullop-branch, RELEASE_2_9_2-RC2, RELEASE_2_9_2-RC1, RELEASE_2_9_2, RELEASE_2_9_1-RC1, RELEASE_2_9_1, RELEASE_2_9_0-RC1, RELEASE_2_9_0-FC, RELEASE_2_9_0, RELEASE_2_9-root, RELEASE_2_9-branch, RELEASE_2_14_1, RELEASE_2_14_0-RC2, RELEASE_2_14_0-RC1, RELEASE_2_14_0, RELEASE_2_14-root, RELEASE_2_14-branch, RELEASE_2_13_0-RC2, RELEASE_2_13_0-RC1, RELEASE_2_13_0-FC, RELEASE_2_13_0, RELEASE_2_13-root, RELEASE_2_13-branch, RELEASE_2_12_1-RC1, RELEASE_2_12_1, RELEASE_2_12_0-RC1, RELEASE_2_12_0-FC, RELEASE_2_12_0, RELEASE_2_12-root, RELEASE_2_12-branch, RELEASE_2_11_2-RC1, RELEASE_2_11_2, RELEASE_2_11_1-RC1, RELEASE_2_11_1, RELEASE_2_11_0-RC1, RELEASE_2_11_0-FC, RELEASE_2_11_0, RELEASE_2_11-root, RELEASE_2_11-branch, RELEASE_2_10_1-RC1, RELEASE_2_10_1, RELEASE_2_10_0-RC2, RELEASE_2_10_0-RC1, RELEASE_2_10_0, RELEASE_2_10-root, RELEASE_2_10-branch, PREAUG25UPDATE, POSTAUG25UPDATE, HPUX_TEST, HEAD, CIMRS_WORK_20130824, BeforeUpdateToHeadOct82011 Changes since 1.9: +6 -6 lines BUG#: 8123 TITLE: Update copyright/license text DESCRIPTION: Fixing trailing spaces in copyright/license text |
//%LICENSE//////////////////////////////////////////////////////////////// // // Licensed to The Open Group (TOG) under one or more contributor license // agreements. Refer to the OpenPegasusNOTICE.txt file distributed with // this work for additional information regarding copyright ownership. // Each contributor licenses this file to you under the OpenPegasus Open // Source License; you may not use this file except in compliance with the // License. // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // ////////////////////////////////////////////////////////////////////////// // //%///////////////////////////////////////////////////////////////////////////// #ifndef Pegasus_AsyncQueue_h #define Pegasus_AsyncQueue_h #include <Pegasus/Common/Linkage.h> #include <Pegasus/Common/List.h> #include <Pegasus/Common/Condition.h> PEGASUS_NAMESPACE_BEGIN /** AsyncQueue implementation (formerly AsyncDQueue). */ template<class ElemType> class AsyncQueue { public: /** Constructor. */ AsyncQueue(); /** Destructor. */ virtual ~AsyncQueue(); /** Close the queue. */ void close(); /** Enqueue an element at the back of queue. @param element The element to enqueue. @return True if the element is successfully enqueued, false if the queue is closed. */ Boolean enqueue(ElemType *element); /** Dequeue an element from the front of the queue. Return null immediately if queue is empty or closed. @return A pointer to the element that was dequeued, or null if the queue is empty or closed. */ ElemType *dequeue(); /** Dequeue an element from the front of the queue (wait if the queue is empty). @return A pointer to the element that was dequeued, or null if the queue is closed (either before or while waiting for an element). */ ElemType *dequeue_wait(); /** Discard all the elements on the list. The size becomes zero afterwards. */ void clear(); /** Return number of element in queue. */ Uint32 count() const { return _rep.size(); } /** Return true is queue is empty (has zero elements). */ Boolean is_empty() const { return _rep.size() == 0; } /** Return true if the queue has been closed (in which case no new elements may be enqueued). */ Boolean is_closed() const { return _closed.get(); } private: Mutex _mutex; Condition _not_empty; AtomicInt _closed; typedef List<ElemType,NullLock> Rep; Rep _rep; }; template<class ElemType> AsyncQueue<ElemType>::AsyncQueue() : _mutex(Mutex::NON_RECURSIVE) { } template<class ElemType> AsyncQueue<ElemType>::~AsyncQueue() { } template<class ElemType> void AsyncQueue<ElemType>::close() { AutoMutex auto_mutex(_mutex); if (!is_closed()) { _closed++; _not_empty.signal(); } } template<class ElemType> Boolean AsyncQueue<ElemType>::enqueue(ElemType *element) { if (element) { AutoMutex auto_mutex(_mutex); if (is_closed()) { return false; } _rep.insert_back(element); _not_empty.signal(); } return true; } template<class ElemType> void AsyncQueue<ElemType>::clear() { AutoMutex auto_mutex(_mutex); _rep.clear(); } template<class ElemType> ElemType* AsyncQueue<ElemType>::dequeue() { AutoMutex auto_mutex(_mutex); if (is_closed()) { return 0; } return _rep.remove_front(); } template<class ElemType> ElemType* AsyncQueue<ElemType>::dequeue_wait() { AutoMutex auto_mutex(_mutex); while (is_empty()) { if (is_closed()) { return 0; } _not_empty.wait(_mutex); } if (is_closed()) { return 0; } ElemType* p = _rep.remove_front(); PEGASUS_DEBUG_ASSERT(p != 0); return p; } PEGASUS_NAMESPACE_END #endif /* Pegasus_AsyncQueue_h */
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