ThreadPool2Example

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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

    Test program demonstrating the basic operation of the gxThread
    pool 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 "gxthread.h"

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

    // Turn console message on or off before the thread are created
    int display_message = 1;

    void PausePrg()
    // Pause the program until enter is pressed
    {
      cout << "\n" << flush;
      cout << "Press Enter to continue..." << "\n" << flush;
      cin.get();
    }

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

    void *SimpleThread::ThreadEntryRoutine(gxThread_t *thread)
    // Thread's entry function
    {
      if(display_message) {
        cout << "Executing worker thread: " << (int)thread->GetThreadParm()
    	 << "\n" << flush;
      }

      return 0;
    }

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

      const unsigned NUM_WORKERS = 10;

      SimpleThread *t = new SimpleThread;
      thrPool *pool = new thrPool;

      unsigned i;
      for(i = 0; i < NUM_WORKERS; i++) {
        t->CreateThread(pool, (void *)i);
        t->sSleep(1);
      }

      t->JoinThread(pool);

      cout << "\n" << flush;
      cout << "Destroying the thread pool..." << "\n" << flush;
      t->DestroyThreadPool(pool);

      cout << "Creating anther pool of " << NUM_WORKERS << " threads"
           << "\n" << flush;
      PausePrg();

      display_message = 0; // Do not display any console messages
      pool = t->CreateThreadPool(NUM_WORKERS);

      t->sSleep(1);
      cout << "\n" << flush;
      cout << "Rebuilding the pool" << "\n" << flush;
      t->RebuildThreadPool(pool);

      // Wait for the treads to finish before destroying the pool
      t->JoinThread(pool);

      cout << "\n" << flush;
      cout << "Destroying the thread pool..." << "\n" << flush;
      if(!pool->IsEmpty()) {
        t->DestroyThreadPool(pool);
      }
      else {
        cout << "The pool is empty" << "\n" << flush;
        // If DestroyThreadPool() is not called the pool will not be deleted
        delete pool;
      }

      cout << "Exiting..." << "\n" << flush;
      delete t;

      return 0; // Exit the process, terminating all threads
    }
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