libgomp/testsuite/libgomp.c-c++-common/task-detach-9.c

/* { dg-do run } */

#include <omp.h>
#include <assert.h>

/* Test tasks with detach clause.  Each thread spawns off a chain of tasks
   in a taskgroup, that can then be executed by any available thread.  */

int main (void)
{
  int x = 0, y = 0, z = 0;
  int thread_count;
  omp_event_handle_t detach_event1, detach_event2;

  #pragma omp parallel private (detach_event1, detach_event2)
    #pragma omp taskgroup
    {
      #pragma omp single
	thread_count = omp_get_num_threads ();

      #pragma omp task detach (detach_event1) untied
	#pragma omp atomic update
	  x++;

      #pragma omp task detach (detach_event2) untied
      {
	#pragma omp atomic update
	  y++;
	omp_fulfill_event (detach_event1);
      }

      #pragma omp task untied
      {
	#pragma omp atomic update
	  z++;
	omp_fulfill_event (detach_event2);
      }
    }

  assert (x == thread_count);
  assert (y == thread_count);
  assert (z == thread_count);
}