Retro68/gcc/libgomp/testsuite/libgomp.c/appendix-a/a.39.1.c
Wolfgang Thaller aaf905ce07 add gcc 4.70
2012-03-28 01:13:14 +02:00

39 lines
680 B
C

/* { dg-do run } */
#include <stdio.h>
#include <omp.h>
void
skip (int i)
{
}
void
work (int i)
{
}
int
main ()
{
omp_lock_t lck;
int id;
omp_init_lock (&lck);
#pragma omp parallel shared(lck) private(id)
{
id = omp_get_thread_num ();
omp_set_lock (&lck);
/* only one thread at a time can execute this printf */
printf ("My thread id is %d.\n", id);
omp_unset_lock (&lck);
while (!omp_test_lock (&lck))
{
skip (id); /* we do not yet have the lock,
so we must do something else */
}
work (id); /* we now have the lock
and can do the work */
omp_unset_lock (&lck);
}
omp_destroy_lock (&lck);
return 0;
}