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/* 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"
void * process(void * arg)
{
int i;
fprintf(stderr, "Starting process %s\n", (char *) arg);
for (i = 0; i < 10000; 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);
else fprintf(stderr, "create a succeeded %d\n", retcode);
retcode = pthread_create(&th_b, NULL, process, (void *) "b");
if (retcode != 0) fprintf(stderr, "create b failed %d\n", retcode);
else fprintf(stderr, "create b succeeded %d\n", retcode);
retcode = pthread_join(th_a, &retval);
if (retcode != 0) fprintf(stderr, "join a failed %d\n", retcode);
else fprintf(stderr, "join a succeeded %d\n", retcode);
retcode = pthread_join(th_b, &retval);
if (retcode != 0) fprintf(stderr, "join b failed %d\n", retcode);
else fprintf(stderr, "join b succeeded %d\n", retcode);
return 0;
}
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