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/* Compiler options:
#progos: linux
#cc: additional_flags=-pthread
#output: Starting process a\naaaaaaaaStarting process b\nababbbbbbbbb
The output will change depending on the exact syscall sequence per
thread, so will change with glibc versions. Prepare to modify; use
the latest glibc.
This file is from glibc/linuxthreads, with the difference that the
number is 10, not 10000. */
/* Creates two threads, one printing 10000 "a"s, the other printing
10000 "b"s.
Illustrates: thread creation, thread joining. */
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include "pthread.h"
static void *
process (void *arg)
{
int i;
fprintf (stderr, "Starting process %s\n", (char *) arg);
for (i = 0; i < 10; i++)
{
write (1, (char *) arg, 1);
}
return NULL;
}
int
main (void)
{
int retcode;
pthread_t th_a, th_b;
void *retval;
retcode = pthread_create (&th_a, NULL, process, (void *) "a");
if (retcode != 0)
fprintf (stderr, "create a failed %d\n", retcode);
retcode = pthread_create (&th_b, NULL, process, (void *) "b");
if (retcode != 0)
fprintf (stderr, "create b failed %d\n", retcode);
retcode = pthread_join (th_a, &retval);
if (retcode != 0)
fprintf (stderr, "join a failed %d\n", retcode);
retcode = pthread_join (th_b, &retval);
if (retcode != 0)
fprintf (stderr, "join b failed %d\n", retcode);
return 0;
}
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