1 /* This testcase is part of GDB, the GNU debugger.
2 
3    Copyright 2002-2013 Free Software Foundation, Inc.
4 
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 3 of the License, or
8    (at your option) any later version.
9 
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14 
15    You should have received a copy of the GNU General Public License
16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17 
18 #include <stdio.h>
19 #include <unistd.h>
20 #include <stdlib.h>
21 #include <pthread.h>
22 
23 void *thread_function(void *arg); /* Pointer to function executed by each thread */
24 
25 #define NUM 5
26 
27 unsigned int args[NUM+1];
28 
main()29 int main() {
30     int res;
31     pthread_t threads[NUM];
32     void *thread_result;
33     long i;
34 
35     for (i = 1; i <= NUM; i++)
36       {
37 	args[i] = 1;
38 	res = pthread_create(&threads[i - 1],
39 		             NULL,
40 			     thread_function,
41 			     (void *) i);
42       }
43 
44     /* last thread start.  */
45     args[0] = 1;
46     thread_function ((void *) 0);
47 
48     exit(EXIT_SUCCESS);
49 }
50 
thread_function(void * arg)51 void *thread_function(void *arg) {
52     int my_number =  (long) arg;
53     int *myp = (int *) &args[my_number];
54 
55     /* Don't run forever.  Run just short of it :)  */
56     while (*myp > 0)
57       {
58 	/* main loop.  */
59 	(*myp) ++;
60 	usleep (1);
61       }
62 
63     pthread_exit(NULL);
64 }
65