VThreadPool.hxx
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- #ifndef VTHREADPOOL_HXX_
- #define VTHREADPOOL_HXX_
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * 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. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const VThreadPool_hxx_version =
- "$Id: VThreadPool.hxx,v 1.2 2001/06/29 03:41:33 bko Exp $";
- #include <pthread.h>
- #include <deque>
- #include <list>
- #include "VThread.hxx"
- #include "VFunctor.hxx"
- #include "VThreadInitException.hxx"
- #include "Sptr.hxx"
- /** this class creates an abstraction for doing work in multiple
- * threads. VFunctors may be added the work queue. The waiting
- * threads of the ThreadPool do the work specified by each VFunctor in
- * the work queue. When the work is done, the thread returns to the
- * thread pool, doing more work if there are any jobs in the work
- * queue or, waiting until there is more work to be done if there are not.
- */
- class VThreadPool
- {
- public:
- typedef list < Sptr < VThread > > ListOfThreads;
- /// constructor
- VThreadPool(int numThreads = 1);
- /// destructor
- virtual ~VThreadPool();
- /// add a functor to the thread pool to be worked on
- void addFunctor(const VFunctor& functor) throw(VThreadInitException&);
- /** shutdown the threadpool. if the finish flag is true, wait
- * till the entire work queue is done
- */
- void shutdown(bool finish = true);
-
- /// get a list of the worker threads
- const ListOfThreads& getWorkerThreads() const
- {
- return workerThreads_;
- };
- /// call from the thread construction function
- static void* workerProc(void* arg);
- private:
- /// initialize the code
- void init() throw (VThreadInitException&);
- deque < VFunctor > queue_;
- pthread_mutex_t queueLock_;
- pthread_cond_t queueNotEmpty_;
- pthread_cond_t queueNotFull_;
- pthread_cond_t queueEmpty_;
- int numThreads_;
- int queueClosed_;
- int shutdown_;
- int currQueueSize_;
- ListOfThreads workerThreads_;
- };
- #endif