! { dg-do run }

! Test tasks with detach clause on an offload device.  Each device
! thread spawns off a chain of tasks in a taskgroup, that can then
! be executed by any available thread.

program task_detach_10
  use omp_lib

  integer (kind=omp_event_handle_kind) :: detach_event1, detach_event2
  integer :: x = 0, y = 0, z = 0
  integer :: thread_count

  !$omp target map (tofrom: x, y, z) map (from: thread_count)
    !$omp parallel private (detach_event1, detach_event2)
      !$omp taskgroup
	!$omp single
	  thread_count = omp_get_num_threads ()
	!$omp end single

	!$omp task detach (detach_event1) untied
	  !$omp atomic update
	    x = x + 1
	!$omp end task

	!$omp task detach (detach_event2) untied
	  !$omp atomic update
	    y = y + 1
	  call omp_fulfill_event (detach_event1)
	!$omp end task

	!$omp task untied
	  !$omp atomic update
	    z = z + 1
	  call omp_fulfill_event (detach_event2)
	!$omp end task
      !$omp end taskgroup
    !$omp end parallel
  !$omp end target

  if (x /= thread_count) stop 1
  if (y /= thread_count) stop 2
  if (z /= thread_count) stop 3
end program