1/* { dg-do run } */
2
3#include <stdio.h>
4#include <omp.h>
5void
6skip (int i)
7{
8}
9
10void
11work (int i)
12{
13}
14int
15main ()
16{
17  omp_lock_t lck;
18  int id;
19  omp_init_lock (&lck);
20#pragma omp parallel shared(lck) private(id)
21  {
22    id = omp_get_thread_num ();
23    omp_set_lock (&lck);
24    /* only one thread at a time can execute this printf */
25    printf ("My thread id is %d.\n", id);
26    omp_unset_lock (&lck);
27    while (!omp_test_lock (&lck))
28      {
29	skip (id);		/* we do not yet have the lock,
30				   so we must do something else */
31      }
32    work (id);			/* we now have the lock
33				   and can do the work */
34    omp_unset_lock (&lck);
35  }
36  omp_destroy_lock (&lck);
37  return 0;
38}
39