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Initial import of CVS-v2_8_branch

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Fred Gleason
2014-08-12 15:13:02 -04:00
commit afd67c7af8
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tests/timer_test.cpp Normal file
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// timer_test.cpp
//
// Test QTimer Accuracy
//
// (C) Copyright 2013 Fred Gleason <fredg@paravelsystems.com>
//
// $Id: timer_test.cpp,v 1.1.2.1 2013/02/07 18:22:06 cvs Exp $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
#include <errno.h>
#include <qapplication.h>
#include <timer_test.h>
MainObject::MainObject(QObject *parent,const char *name)
: QObject(parent,name)
{
//
// Timer
//
test_timer=new QTimer(this);
connect(test_timer,SIGNAL(timeout()),this,SLOT(timeoutData()));
//
// Start Run
//
test_interval=60000;
if(gettimeofday(&test_start_tv,NULL) !=0) {
perror("gettimeofday");
}
test_timer->start(test_interval,true);
}
void MainObject::timeoutData()
{
//
// Calculate Result
//
if(gettimeofday(&test_end_tv,NULL) !=0) {
perror("gettimeofday");
}
double expected=(double)test_interval/1000.0;
double got=Time(&test_end_tv)-Time(&test_start_tv);
printf("Expected: %12.3lf Got: %12.3lf Diff: %8.3lf%%\n",
expected,got,100.0*got/expected);
//
// Start Next Run
//
test_interval*=2;
if(gettimeofday(&test_start_tv,NULL) !=0) {
perror("gettimeofday");
}
test_timer->start(test_interval,true);
}
double MainObject::Time(struct timeval *tv)
{
return (double)tv->tv_sec+(double)tv->tv_usec/1000000.0;
}
int main(int argc,char *argv[])
{
QApplication a(argc,argv,false);
new MainObject(NULL,"main");
return a.exec();
}