main.c

#include <stdio.h>
#include <pthread.h>

void *
do_loop(void *data)
{
    int i;
    int j;

    int me = *((int *)data);

    printf("start new thread[%d]...\n", me);

    for (i = 0; i < 10; i ++) {
        for(j = 0; j < 50000000; j++ ) {

        }
        
        printf ("thread:'%d'-Got '%d'\n", me, i);
    }

    // there is no need here to use pthread_exit()
    // since, when returns of function, the thread
    // exit automaticlly anyway.
    pthread_exit(NULL);

    // 2. cancellation
    // pthread_cancel(thr_id); // always reutrn 0, so we can not know if it succeeded or not
    // cancellation point:
    /*
        pthread_join(), powerfull api, the soul of multi-threaded programming
        pthread_cond_wait()
        pthread_cond_timewait()
        pthread_testcancel()
        sem_wait()
        sigwait()
    */

    // 3. clean up
    // pthread_cleanup_push() register cleanup function
    // pthread_cleanup_pop(0) unregiter cleanup function
    // pthread_cleanup_pop(1) unregiter cleanup function and run function

    // 4. detaching a thread
    // The pthread_detach() function gets one parameter, of type pthread_t, that denotes the thread we wish to put in the detached state.

}

int
main(int argc, char *argv[])
{
    int thr_id;
    pthread_t p_thread;
    int a = 1;
    int b = 2;

    thr_id = pthread_create(&p_thread, 
    NULL, 
    do_loop, 
    (void *)&a);

    printf("running in main thread...\n");
    do_loop((void *)&b);

    printf("not reached\n");

    return 0;
}