// ------------------------------- //
// -------- Start of File -------- //
// ------------------------------- //
// ----------------------------------------------------------- //
// C++ Source Code File Name: testprog.cpp
// Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
// Produced By: glNET Software
// File Creation Date: 03/25/2000
// Date Last Modified: 05/25/2001
// Copyright (c) 2001 glNET Software
// ----------------------------------------------------------- //
// ------------- Program Description and Details ------------- //
// ----------------------------------------------------------- //
/*
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
class using semaphores.
*/
// ----------------------------------------------------------- //
#include <iostream.h>
#include <stdlib.h>
#include "gxthread.h"
#include "gxsema.h"
#ifdef __MSVC_DEBUG__
#include "leaktest.h"
#endif
// Constants
const int NUM_THREADS = 3;
// Global semaphore object
gxSemaphore sema;
// Shared data
int sharedData1 = 0;
int sharedData2 = 0;
// Class derived from the abstract gxThread base class
class SimpleThread : public gxThread
{
public:
SimpleThread() { }
~SimpleThread() { }
private: // Base class interface
void *ThreadEntryRoutine(gxThread_t *thread);
};
void *SimpleThread::ThreadEntryRoutine(gxThread_t *thread)
{
cout << "Entering thread" << endl;
if(sema.SemaphoreWait() != 0) {
cout << sema.SemaphoreExceptionMessage() << endl;
return ExitThread(thread, 1);
}
// ********** Critical Section ******************* //
cout << "Start critical section, holding semaphore" << endl;
// Access to shared data goes here
++sharedData1; --sharedData2;
cout << "sharedData1 = " << sharedData1 << ", sharedData2 = " << sharedData2
<< endl;
cout << "End critical section, release semaphore" << endl;
// ********** Critical Section ******************* //
if(sema.SemaphorePost() != 0) {
cout << sema.SemaphoreExceptionMessage() << endl;
return ExitThread(thread, 1);
}
return 0;
}
int main(int argc, char **argv)
{
#ifdef __MSVC_DEBUG__
InitLeakTest();
#endif
SimpleThread t;
gxThread_t *thread[NUM_THREADS];
int i;
cout << "Wait on semaphore to prevent access to shared data" << endl;
cout << "sharedData1 = " << sharedData1 << ", sharedData2 = " << sharedData2
<< endl;
if(sema.SemaphoreWait() != 0) {
cout << sema.SemaphoreExceptionMessage() << endl;
return 0;
}
cout << "Creating " << NUM_THREADS << " threads" << endl;
for(i = 0; i < NUM_THREADS; ++i) thread[i] = t.CreateThread();
cout << "Wait a bit until we are done with the shared data" << endl;
t.sSleep(3);
cout << "Unlock shared data" << endl;
if(sema.SemaphorePost() != 0) {
cout << sema.SemaphoreExceptionMessage() << endl;
return 0;
}
cout << "Wait for the threads to complete, and release their resources"
<< endl;
for(i = 0; i < NUM_THREADS; ++i) t.JoinThread(thread[i]);
// Prevent memory leaks
for(i = 0; i < NUM_THREADS; ++i) delete thread[i];
return 0;
}
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