// ------------------------------- //
// -------- 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 used to the basic functionality of the Thread Pool
class.
*/
// ----------------------------------------------------------- //
#include <iostream.h>
#include "thrpool.h"
#include "gthreadt.h"
#ifdef __MSVC_DEBUG__
#include "leaktest.h"
#endif
void PausePrg()
// Pause the program and wait for the user to press enter.
{
// Pause the program until enter is pressed
cout << endl;
cout << "Press Enter to continue...\n";
cin.get();
}
void ScrollForward(thrPool &pool)
{
cout << "Walking through the pool..." << endl;
thrPoolNode *ptr = pool.GetHead();
while(ptr) {
cout << (char)ptr->GetThreadPtr()->GetObjectID() << ' ';
ptr = ptr->GetNext();
}
cout << endl;
}
void RewindPool(thrPool &pool)
{
cout << "Walking through the pool in a backward direction..." << endl;
thrPoolNode *ptr = pool.GetTail();
// Walk through the pool in a backward direction
while(ptr) {
cout << (char)ptr->GetThreadPtr()->GetObjectID() << ' ';
ptr = ptr->GetPrev();
}
cout << endl;
}
int main()
{
#ifdef __MSVC_DEBUG__
InitLeakTest();
#endif
thrPool pool;
thrPoolNode *ptr;
cout << "Loading data elements into the pool..." << endl;
thrPoolNode *na = new thrPoolNode;
thrPoolNode *nb = new thrPoolNode;
thrPoolNode *nc = new thrPoolNode;
thrPoolNode *nd = new thrPoolNode;
thrPoolNode *n1 = new thrPoolNode;
thrPoolNode *n2 = new thrPoolNode;
thrPoolNode *n3 = new thrPoolNode;
thrPoolNode *n4 = new thrPoolNode;
// Allocating some memory buffers
const unsigned num_blocks = 9;
gxThread_t *buf[num_blocks];
unsigned i;
for(i = 0; i < num_blocks; i++) {
buf[i] = new gxThread_t;
// Set an arbitary object ID stating starting with ASCII character 'A'
buf[i]->SetObjectID(65+i);
}
na->SetThreadPtr(buf[0]);
nb->SetThreadPtr(buf[1]);
nc->SetThreadPtr(buf[2]);
nd->SetThreadPtr(buf[3]);
// Load some pool elements
pool.InsertAfter(pool.GetHead(), na);
pool.InsertAfter(na, nb);
pool.InsertAfter(nb, nc);
pool.InsertAfter(nc, nd);
n1->SetThreadPtr(buf[4]);
n2->SetThreadPtr(buf[5]);
n3->SetThreadPtr(buf[6]);
n4->SetThreadPtr(buf[7]);
// Testing insert functions
pool.InsertBefore(na, n1);
pool.InsertBefore(nc, n2);
pool.InsertAfter(nb, n3);
pool.InsertAfter(nd, n4);
// Reordering the pool
pool.MoveToBack(na);
pool.MoveAfter(na, nc);
pool.MoveBefore(nc, nb);
pool.MoveAfter(nc, nd);
pool.MoveAfter(nd, n2);
pool.MoveBefore(n2, n1);
pool.MoveAfter(n2, n3);
pool.MoveAfter(n3, n4);
ScrollForward(pool);
RewindPool(pool);
PausePrg();
cout << "Adding another item to the pool..." << endl;
ptr = pool.AddThread(buf[8]);
ScrollForward(pool);
PausePrg();
cout << "Moving pool item to the front of the pool" << endl;
pool.MoveToFront(ptr);
ScrollForward(pool);
cout << "Moving item to the back of the pool..." << endl;
pool.MoveToBack(ptr);
ScrollForward(pool);
PausePrg();
cout << "Removing the head of the pool..." << endl;
ptr = pool.GetHead();
gxThread_t *tptr = pool.RemoveNode(ptr);
if(tptr) delete tptr; // Prevent memory leaks
ScrollForward(pool);
cout << "Removing the tail of the pool..." << endl;
ptr = pool.GetTail();
tptr = pool.RemoveNode(ptr);
if(tptr) delete tptr; // Prevent memory leaks
ScrollForward(pool);
PausePrg();
cout << "Testing for memory leaks..." << endl;
unsigned len = sizeof(gxThread_t);
const unsigned num_to_allocate = 1000; // 1000 * 1000;
const unsigned mem_bufs = (sizeof(thrPoolNode) + len) * num_to_allocate;
cout << "Allocating " << mem_bufs << " bytes..." << endl;
// Clear the thread pool without checking the status of each thread
pool.ClearPool();
unsigned count1 = 0;
unsigned count2 = 0;
for(i = 0; i < num_to_allocate; ++i) {
gxThread_t *sbuf = new gxThread_t;
count1 += sizeof(sbuf);
if(!sbuf) {
cout << "Memory allocation error at " << (count1+count2) << " bytes"
<< endl;
break;
}
count2 += sizeof(thrPoolNode);
if(!pool.AddThread(sbuf)) {
cout << "Memory allocation error at " << (count1+count2) << " bytes"
<< endl;
break;
}
}
cout << "Done" << endl;
PausePrg();
cout << "Releasing memory allocated back to the heap..." << endl;
while(!pool.IsEmpty()) {
// Clear the pool, giving the application a chance to check the
// status of each thread.
gxThread_t *t = pool.RemoveTail();
if(t) {
// Process the thread and release any memory the thread is holding
// ...
delete t;
}
}
pool.MakeEmpty(); // The thread pool is no empty
PausePrg();
cout << "Exiting..." << endl;
cout << endl;
return 0;
}
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