1 /* Compiler options:
2 #notarget: cris*-*-elf
3 #cc: additional_flags=-pthread
4 #output: Starting process a\naaaaaaaaStarting process b\nababbbbbbbbb
5
6 The output will change depending on the exact syscall sequence per
7 thread, so will change with glibc versions. Prepare to modify; use
8 the latest glibc.
9
10 This file is from glibc/linuxthreads, with the difference that the
11 number is 10, not 10000. */
12
13 /* Creates two threads, one printing 10000 "a"s, the other printing
14 10000 "b"s.
15 Illustrates: thread creation, thread joining. */
16
17 #include <stddef.h>
18 #include <stdio.h>
19 #include <unistd.h>
20 #include "pthread.h"
21
22 static void *
process(void * arg)23 process (void *arg)
24 {
25 int i;
26 fprintf (stderr, "Starting process %s\n", (char *) arg);
27 for (i = 0; i < 10; i++)
28 {
29 write (1, (char *) arg, 1);
30 }
31 return NULL;
32 }
33
34 int
main(void)35 main (void)
36 {
37 int retcode;
38 pthread_t th_a, th_b;
39 void *retval;
40
41 retcode = pthread_create (&th_a, NULL, process, (void *) "a");
42 if (retcode != 0)
43 fprintf (stderr, "create a failed %d\n", retcode);
44 retcode = pthread_create (&th_b, NULL, process, (void *) "b");
45 if (retcode != 0)
46 fprintf (stderr, "create b failed %d\n", retcode);
47 retcode = pthread_join (th_a, &retval);
48 if (retcode != 0)
49 fprintf (stderr, "join a failed %d\n", retcode);
50 retcode = pthread_join (th_b, &retval);
51 if (retcode != 0)
52 fprintf (stderr, "join b failed %d\n", retcode);
53 return 0;
54 }
55