1! { dg-do run }
2
3! Test tasks with detach clause.  Each thread spawns off a chain of tasks,
4! that can then be executed by any available thread.  Each thread uses
5! taskwait to wait for the child tasks to complete.
6
7program task_detach_7
8  use omp_lib
9
10  integer (kind=omp_event_handle_kind) :: detach_event1, detach_event2
11  integer :: x = 0, y = 0, z = 0
12  integer :: thread_count
13
14  !$omp parallel private (detach_event1, detach_event2)
15    !$omp single
16      thread_count = omp_get_num_threads()
17    !$omp end single
18
19    !$omp task detach (detach_event1) untied
20      !$omp atomic update
21	x = x + 1
22    !$omp end task
23
24    !$omp task detach (detach_event2) untied
25      !$omp atomic update
26	y = y + 1
27      call omp_fulfill_event (detach_event1)
28    !$omp end task
29
30    !$omp task untied
31      !$omp atomic update
32	z = z + 1
33      call omp_fulfill_event (detach_event2)
34    !$omp end task
35
36    !$omp taskwait
37  !$omp end parallel
38
39  if (x /= thread_count) stop 1
40  if (y /= thread_count) stop 2
41  if (z /= thread_count) stop 3
42end program
43