fltk/test/threads.cxx
Michael R Sweet 00cb676e11 Copyright update for 1.1.3 release (not quite yet, but soon...)
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@2936 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
2003-01-30 21:46:07 +00:00

131 lines
3.5 KiB
C++

//
// "$Id: threads.cxx,v 1.10.2.4 2003/01/30 21:46:04 easysw Exp $"
//
// Threading example program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2003 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library 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.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
#include <config.h>
#if HAVE_PTHREAD || defined(WIN32)
# include <FL/Fl.H>
# include <FL/Fl_Window.H>
# include <FL/Fl_Browser.H>
# include <FL/Fl_Value_Output.H>
# include "threads.h"
# include <stdio.h>
# include <math.h>
Fl_Thread prime_thread;
Fl_Browser *browser1, *browser2;
Fl_Value_Output *value1, *value2;
int start2 = 3;
void* prime_func(void* p)
{
Fl_Browser* browser = (Fl_Browser*) p;
Fl_Value_Output *value;
int n;
int step;
if (browser == browser2) {
n = start2;
start2 += 2;
step = 12;
value = value2;
} else {
n = 3;
step = 2;
value = value1;
}
// very simple prime number calculator !
for (; ; n+= step) {
int p;
int hn = (int)sqrt(n);
for (p=3; p<=hn; p+=2) if ( n%p == 0 ) break;
if (p >= hn) {
char s[128];
sprintf(s, "%d", n);
Fl::lock();
browser->add(s);
browser->bottomline(browser->size());
if (n > value->value()) value->value(n);
Fl::unlock();
Fl::awake((void*) (browser == browser1? p:0)); // Cause the browser to redraw ...
}
}
return 0;
}
int main(int argc, char **argv)
{
Fl_Window* w = new Fl_Window(200, 200, "Single Thread");
browser1 = new Fl_Browser(0, 0, 200, 175);
w->resizable(browser1);
value1 = new Fl_Value_Output(100, 175, 200, 25, "Max Prime:");
w->end();
w->show(argc, argv);
w = new Fl_Window(200, 200, "Six Threads");
browser2 = new Fl_Browser(0, 0, 200, 175);
w->resizable(browser2);
value2 = new Fl_Value_Output(100, 175, 200, 25, "Max Prime:");
w->end();
w->show();
browser1->add("Prime numbers:");
browser2->add("Prime numbers:");
Fl::lock(); // you must do this before creating any threads!
// One thread displaying in one browser
fl_create_thread(prime_thread, prime_func, browser1);
// Several threads displaying in another browser
fl_create_thread(prime_thread, prime_func, browser2);
fl_create_thread(prime_thread, prime_func, browser2);
fl_create_thread(prime_thread, prime_func, browser2);
fl_create_thread(prime_thread, prime_func, browser2);
fl_create_thread(prime_thread, prime_func, browser2);
fl_create_thread(prime_thread, prime_func, browser2);
// Fl::run();
while (w->visible()) {
Fl::wait();
// void* m = Fl::thread_message();
// printf("Received message: %p\n", m);
}
return 0;
}
#else
# include <FL/fl_ask.H>
int main() {
fl_alert("Sorry, threading not supported on this platform!");
}
#endif // HAVE_PTHREAD || WIN32
//
// End of "$Id: threads.cxx,v 1.10.2.4 2003/01/30 21:46:04 easysw Exp $".
//