CODEWITHSUNDEEP
cmultithreadingpthreads
Davood Hanifi
Davood Hanifi

Reputation: 1274

Why does this code not run?

void myThread(void *arg) {
    printf("Thread ran!\n");
    pthread_exit( NULL );
}

int main() {
    int ret;
    pthread_t mythread;
    ret=pthread_create(&mythread,NULL,myThread,NULL);
    if (ret != 0) {
            printf( "Can’t create pthread (%s)\n", strerror(errno ) );
            exit(-1);
    }
    return 0;
}

Upvotes: 2

Views: 199

Answers (2)

Yann Droneaud
Yann Droneaud

Reputation: 5493

You have to wait in the main thread, use pthread_join() after calling pthread_create().

Upvotes: 5

James M
James M

Reputation: 16728

Because main returns immediately, before the thread has had a chance to execute - try adding sleep(1000); before return 0; and you'll probably find that it works.

If you'd like main to wait until the thread finishes, try pthread_join (but then you might as well not have a thread at all).

pthread_join(mythread, 0);
return 0;

Upvotes: 9

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