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#include <fltk/Fl.h>
#include <fltk/Fl_Window.h>
#include <fltk/Fl_Browser.h>
#include <fltk/Fl_Threads.h>
#include <stdio.h>
Fl_Thread prime_thread;
Fl_Browser *browser1, *browser2;
void* prime_func(void* p)
{
Fl_Browser* browser = (Fl_Browser*) p;
// very loosy prime number calculator !
for (int n=1000000; ; n++) {
int p;
for (p=2; p<n; p++) if ( n%p == 0 ) break;
if (p == n) {
char s[128];
sprintf(s, "%d", n);
Fl::lock();
browser->add(s);
Fl::unlock();
Fl::awake((void*) (browser == browser1? p:0)); // Cause the browser to redraw ...
}
}
return 0;
}
int main()
{
Fl_Window* w = new Fl_Window(200, 300, "Multithread test");
browser1 = new Fl_Browser(0, 0, 200, 300);
w->end();
w->show();
w = new Fl_Window(200, 300, "Multithread test");
browser2 = new Fl_Browser(0, 0, 200, 300);
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();
if (m) printf("Recieved message: %d\n", int(m));
}
return 0;
}
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