threads.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Sat, 13 Dec 2008 17:57:54 +0100
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/**
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 *     $Id: threads.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $
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 * $Source: /development/c/demos/threads.c,v $
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <time.h>
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void *thread_func (void *vptr_args);
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void do_some_work (void)
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{
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    time_t start_time = time (NULL);
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    while (time (NULL) == start_time);  /* busy-wait for 0-1 seconds */
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}
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int main (int argc, char **argv)
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{
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    int i;
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    pthread_t thread;
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    pthread_create (&thread, NULL, &thread_func, NULL);
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    for (i = 0; i < 20; ++i) {
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        fprintf (stdout, "a\n");
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        do_some_work ();
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    }
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    pthread_join (thread, NULL);
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    exit (EXIT_SUCCESS);
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}
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void *thread_func (void *vptr_args)
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{
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    int i;
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    for (i = 0; i < 20; ++i) {
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        fprintf (stderr, "  b\n");
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        do_some_work ();
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    }
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    return NULL;
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}