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/* { dg-do compile } */

#include <omp.h>

typedef struct

{

  int a, b;

  omp_nest_lock_t lck;

} pair;

int work1 ();

int work2 ();

int work3 ();

void

incr_a (pair * p, int a)

{

  /* Called only from incr_pair, no need to lock. */

  p->a += a;

}

void

incr_b (pair * p, int b)

{

  /* Called both from incr_pair and elsewhere, */

  /* so need a nestable lock. */

  omp_set_nest_lock (&p->lck);

  p->b += b;

  omp_unset_nest_lock (&p->lck);

}

void

incr_pair (pair * p, int a, int b)

{

  omp_set_nest_lock (&p->lck);

  incr_a (p, a);

  incr_b (p, b);

  omp_unset_nest_lock (&p->lck);

}

void

a40 (pair * p)

{

#pragma omp parallel sections

  {

#pragma omp section

    incr_pair (p, work1 (), work2 ());

#pragma omp section

    incr_b (p, work3 ());

  }

}