ThreadSema2Example

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    // C++ Source Code File Name: testprog.cpp
    // Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
    // Produced By: DataReel Software Development Team
    // File Creation Date: 03/25/2000
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2016 DataReel Software Development
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    // ------------- Program Description and Details ------------- //
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    /*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
    USA

    Simple test program demonstrating barrier synchronization
    using the gxSemaphore class.
    */
    // ----------------------------------------------------------- //
    #include "gxdlcode.h"

    #if defined (__USE_ANSI_CPP__) // Use the ANSI Standard C++ library
    #include <iostream>
    using namespace std; // Use unqualified names for Standard C++ library
    #else // Use the old iostream library by default
    #include <iostream.h>
    #endif // __USE_ANSI_CPP__

    #include <stdlib.h>
    #include "gxthread.h"
    #include "gxsema.h"

    #ifdef __MSVC_DEBUG__
    #include "leaktest.h"
    #endif

    // Global semaphore objects
    gxSemaphore semaA, semaB;

    // Classes derived from the gxThread base class
    class Simple1 : public gxThread
    {
    private: // Base class interface
      void *ThreadEntryRoutine(gxThread_t *thread);
    };

    class Simple2 : public gxThread
    {
    private: // Base class interface
      void *ThreadEntryRoutine(gxThread_t *thread);
    };

    void *Simple1::ThreadEntryRoutine(gxThread_t *thread)
    {
      cout << "Thread 1 here, before the barrier." << "\n";
      semaB.SemaphorePost();
      semaA.SemaphoreWait();
      cout << "Thread 1 after the barrier." << "\n";
      return 0;
    }

    void *Simple2::ThreadEntryRoutine(gxThread_t *thread)
    {
      cout << "Thread 2 here, before the barrier." << "\n";
      semaA.SemaphorePost();
      semaB.SemaphoreWait();
      cout << "Thread 2 after the barrier." << "\n";
      return 0;
    }

    int main()
    {
    #ifdef __MSVC_DEBUG__
      InitLeakTest();
    #endif

      Simple1 t1;
      Simple2 t2;

      gxThread_t *t1_thread = t1.CreateThread();
      gxThread_t *t2_thread = t2.CreateThread();

      t1.JoinThread(t1_thread);
      t2.JoinThread(t2_thread);

      // Prevent memory leaks
      delete t1_thread;
      delete t2_thread;

      return 0;
    }
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