tRWMutex.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * 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 $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const RWMutexTest_cxx_Version =
- "$Id: tRWMutex.cxx,v 1.2 2001/03/09 08:30:41 icahoon Exp $";
- #include "Application.hxx"
- #include "Runnable.hxx"
- #include "VRWLock.hxx"
- #include "VCondition.h"
- #include "Thread.hxx"
- #include "SignalHandler.hxx"
- #include "VLog.hxx"
- using Vocal::Process::Runnable;
- using Vocal::Process::Application;
- using Vocal::Process::Thread;
- using Vocal::Process::SignalHandler;
- using Vocal::Logging::VLog;
- using Vocal::ReturnCode;
- using Vocal::SUCCESS;
- class DataReader : public Runnable
- {
- public:
-
- DataReader(VRWLock & lock, int & data, int & readcount)
- : myLock(lock), myData(data), myReadCount(readcount)
- {
- }
-
- ReturnCode run();
-
- private:
-
- VRWLock & myLock;
- int & myData;
- int & myReadCount;
- };
- ReturnCode
- DataReader::run()
- {
- while ( true )
- {
- myLock.ReadLock();
- myReadCount++;
- cout << Thread::selfId() << ": read locked" << endl;
- if ( myData != 0 )
- {
- assert( 0 );
- }
-
-
- while ( myReadCount != 4 )
- {
- vusleep(1000000);
- }
-
- if ( myReadCount == 4 )
- {
- vusleep(1000000);
- }
- myReadCount--;
-
- cout << Thread::selfId() << ": read unlocked" << endl;
- myLock.Unlock();
- }
- return ( SUCCESS );
- }
- class DataWriter : public Runnable
- {
- public:
-
- DataWriter(VRWLock & lock, int & data)
- : myLock(lock), myData(data)
- {
- }
- ReturnCode run();
-
- private:
-
- VRWLock & myLock;
- int & myData;
- };
- ReturnCode
- DataWriter::run()
- {
- while ( true )
- {
- myLock.WriteLock();
- cout << Thread::selfId() << ": write locked" << endl;
- for ( int i = 0; i < 5; i++ )
- {
- myData = ((myData + 1) % 5);
- vusleep(200000);
- assert( myData == ((i+1)%5) );
-
- cout << myData << endl;
- }
- cout << Thread::selfId() << ": write unlocked" << endl;
- myLock.Unlock();
-
- vusleep(1500000);
- }
- return ( SUCCESS );
- }
- class RWMutexTest : public Application
- {
- public:
-
- RWMutexTest();
-
- virtual ~RWMutexTest() {}
-
- ReturnCode init(int, char **, char **);
- void uninit();
-
- ReturnCode run();
- private:
-
- VRWLock myLock;
- int myData;
- int myReadCount;
-
- DataReader r1, r2, r3, r4;
- DataWriter w1, w2;
-
- Thread * read1, * read2, *read3, *read4,
- * write1, * write2;
- };
- RWMutexTest::RWMutexTest()
- : myLock(),
- myData(0),
- myReadCount(0),
- r1(myLock, myData, myReadCount),
- r2(myLock, myData, myReadCount),
- r3(myLock, myData, myReadCount),
- r4(myLock, myData, myReadCount),
- w1(myLock, myData),
- w2(myLock, myData),
- read1(0),
- read2(0),
- read3(0),
- read4(0),
- write1(0),
- write2(0)
- {
- }
- ReturnCode
- RWMutexTest::init(int, char **, char **)
- {
- Thread::init();
- SignalHandler::init();
- VLog::init(LOG_DEBUG);
-
- read1 = new Thread(r1);
- read2 = new Thread(r2);
- read3 = new Thread(r3);
- read4 = new Thread(r4);
- write1 = new Thread(w1);
- write2 = new Thread(w2);
-
- return ( SUCCESS );
- }
- ReturnCode
- RWMutexTest::run()
- {
- return ( SUCCESS );
- }
- void
- RWMutexTest::uninit()
- {
- write2->join();
- write1->join();
- read4->join();
- read3->join();
- read2->join();
- read1->join();
- }
- Application *
- Application::create()
- {
- return ( new RWMutexTest );
- }
- int main(int argc, char ** argv, char ** arge)
- {
- return ( Application::main(argc, argv, arge) );
- }