1 /**

     2  *     $Id: threads.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $

     3  * $Source: /development/c/demos/threads.c,v $

     4  */

     5 

     6 #include <stdio.h>

     7 #include <stdlib.h>

     8 

     9 #include <pthread.h>

    10 #include <time.h>

    11 

    12 void *thread_func (void *vptr_args);

    13 

    14 void do_some_work (void)

    15 {

    16     time_t start_time = time (NULL);

    17 

    18     while (time (NULL) == start_time);  /* busy-wait for 0-1 seconds */

    19 }

    20 

    21 int main (int argc, char **argv)

    22 {

    23     int i;

    24     pthread_t thread;

    25 

    26     pthread_create (&thread, NULL, &thread_func, NULL);

    27 

    28     for (i = 0; i < 20; ++i) {

    29         fprintf (stdout, "a\n");

    30 

    31         do_some_work ();

    32     }

    33 

    34     pthread_join (thread, NULL);

    35 

    36     exit (EXIT_SUCCESS);

    37 }

    38 

    39 void *thread_func (void *vptr_args)

    40 {

    41     int i;

    42 

    43     for (i = 0; i < 20; ++i) {

    44         fprintf (stderr, "  b\n");

    45 

    46         do_some_work ();

    47     }

    48     return NULL;

    49 }