mirror of https://github.com/fltk/fltk
131 lines
3.5 KiB
C++
131 lines
3.5 KiB
C++
//
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// "$Id: threads.cxx,v 1.10.2.3 2002/01/01 15:11:33 easysw Exp $"
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//
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// Threading example program for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2002 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@fltk.org".
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//
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#include <config.h>
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#if HAVE_PTHREAD || defined(WIN32)
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# include <FL/Fl.H>
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# include <FL/Fl_Window.H>
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# include <FL/Fl_Browser.H>
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# include <FL/Fl_Value_Output.H>
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# include "threads.h"
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# include <stdio.h>
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# include <math.h>
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Fl_Thread prime_thread;
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Fl_Browser *browser1, *browser2;
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Fl_Value_Output *value1, *value2;
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int start2 = 3;
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void* prime_func(void* p)
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{
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Fl_Browser* browser = (Fl_Browser*) p;
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Fl_Value_Output *value;
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int n;
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int step;
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if (browser == browser2) {
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n = start2;
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start2 += 2;
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step = 12;
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value = value2;
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} else {
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n = 3;
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step = 2;
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value = value1;
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}
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// very simple prime number calculator !
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for (; ; n+= step) {
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int p;
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int hn = (int)sqrt(n);
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for (p=3; p<=hn; p+=2) if ( n%p == 0 ) break;
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if (p >= hn) {
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char s[128];
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sprintf(s, "%d", n);
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Fl::lock();
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browser->add(s);
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browser->bottomline(browser->size());
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if (n > value->value()) value->value(n);
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Fl::unlock();
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Fl::awake((void*) (browser == browser1? p:0)); // Cause the browser to redraw ...
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}
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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Fl_Window* w = new Fl_Window(200, 200, "Single Thread");
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browser1 = new Fl_Browser(0, 0, 200, 175);
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w->resizable(browser1);
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value1 = new Fl_Value_Output(100, 175, 200, 25, "Max Prime:");
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w->end();
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w->show(argc, argv);
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w = new Fl_Window(200, 200, "Six Threads");
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browser2 = new Fl_Browser(0, 0, 200, 175);
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w->resizable(browser2);
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value2 = new Fl_Value_Output(100, 175, 200, 25, "Max Prime:");
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w->end();
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w->show();
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browser1->add("Prime numbers:");
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browser2->add("Prime numbers:");
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Fl::lock(); // you must do this before creating any threads!
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// One thread displaying in one browser
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fl_create_thread(prime_thread, prime_func, browser1);
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// Several threads displaying in another browser
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fl_create_thread(prime_thread, prime_func, browser2);
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fl_create_thread(prime_thread, prime_func, browser2);
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fl_create_thread(prime_thread, prime_func, browser2);
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fl_create_thread(prime_thread, prime_func, browser2);
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fl_create_thread(prime_thread, prime_func, browser2);
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fl_create_thread(prime_thread, prime_func, browser2);
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// Fl::run();
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while (w->visible()) {
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Fl::wait();
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// void* m = Fl::thread_message();
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// printf("Received message: %p\n", m);
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}
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return 0;
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}
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#else
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# include <FL/fl_ask.H>
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int main() {
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fl_alert("Sorry, threading not supported on this platform!");
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}
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#endif // HAVE_PTHREAD || WIN32
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//
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// End of "$Id: threads.cxx,v 1.10.2.3 2002/01/01 15:11:33 easysw Exp $".
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//
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