VSemaphore.hxx
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上传日期:2013-07-25
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- #ifndef VSEMAPHORE_HXX_
- #define VSEMAPHORE_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 $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const VSemaphore_hxx_version =
- "$Id: VSemaphore.hxx,v 1.3 2001/06/29 05:36:29 bko Exp $";
- #ifdef WIN32
- #include <pthread.h>
- #endif
- #if defined( __linux__ ) || defined(__FreeBSD__) || defined (WIN32)
- #include <semaphore.h>
- #else
- #include <synch.h>
- #endif
- #if defined (__linux__) || (__FreeBSD__) || defined (WIN32)
- typedef sem_t vsem_t;
- #else
- typedef sema_t vsem_t;
- #endif
- /** Class implements a semaphore */
- class VSemaphore
- {
- public:
- /// default constructor -- sets the count to 1
- VSemaphore();
- /** constructor which can set the count to a value
- @param available value to set the count to
- */
- VSemaphore(int available);
- /// destructor
- virtual ~VSemaphore();
- /** if count == 0, wait on the semaphore. If count > 0,
- * decrement count and continue */
- void Wait();
- /// increment count, waking a waiting thread if there are any
- void Post();
- /** increment count by how_many, waking a waiting thread if
- * there are any */
- void Post(int how_many);
- private:
- vsem_t semaphore;
- } ;
- #endif