1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
//
// "$Id: threads.cxx,v 1.10.2.6 2004/04/11 04:39:01 easysw Exp $"
//
// Threading example program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2004 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((double)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 1.10.2.6 2004/04/11 04:39:01 easysw Exp $".
//
|
