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// 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 ------------- //
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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 the basic operation of the
gxThread class using mutex and condition variable synchronization
primitives.
*/
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#include <iostream.h>
#include "gxthread.h"
#include "gxmutex.h"
#include "gxcond.h"
#ifdef __MSVC_DEBUG__
#include "leaktest.h"
#endif
// Constants
const int max_reps = 10;
// Global variables
char buffer;
int buffer_has_item = 0;
int num_reps;
// Global synchronization objects
gxMutex mutex;
gxCondition condition;
// Standalone funciton that works with the reader class
inline char make_new_item() { return 'A' + num_reps; }
inline void consume_item(char &c) { c = 0; }
void WriterFunction();
// Class derived from the abstract gxThread base class
class ReaderClass : public gxThread
{
public:
ReaderClass() { }
~ReaderClass() { }
private: // Base class interface
void *ThreadEntryRoutine(gxThread_t *thread);
};
// Program's main thread of execution
int main()
{
#ifdef __MSVC_DEBUG__
InitLeakTest();
#endif
// Set the rep count to zero
num_reps = 0;
ReaderClass t;
gxThread_t *tptr = t.CreateThread();
WriterFunction();
// Wait for the thread to consume the last item before exiting
t.sSleep(3);
delete tptr; // Prevent memory leaks
return 0;
}
void *ReaderClass::ThreadEntryRoutine(gxThread_t *thread)
{
while(num_reps < max_reps) {
mutex.MutexLock();
condition.ConditionTimedWait(&mutex, 1);
if(buffer_has_item == 1) {
cout << "Comsuing item: " << buffer << endl;
consume_item(buffer);
buffer_has_item = 0;
}
mutex.MutexUnlock();
}
return 0;
}
void WriterFunction()
{
while(num_reps < max_reps) {
mutex.MutexLock();
condition.ConditionTimedWait(&mutex, 1);
if(buffer_has_item == 0) {
buffer = make_new_item();
cout << "Making item: " << buffer << endl;
buffer_has_item = 1;
num_reps++;
}
mutex.MutexUnlock();
}
}
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