libgomp/testsuite/libgomp.fortran/task-detach-10.f90

   1 ! { dg-do run }
   2
   3 ! Test tasks with detach clause on an offload device.  Each device
   4 ! thread spawns off a chain of tasks in a taskgroup, that can then
   5 ! be executed by any available thread.
   6
   7 program task_detach_10
   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   !$omp target map (tofrom: x, y, z) map (from: thread_count)
  15     !$omp parallel private (detach_event1, detach_event2)
  16       !$omp taskgroup
  17         !$omp single
  18           thread_count = omp_get_num_threads ()
  19         !$omp end single
  20
  21         !$omp task detach (detach_event1) untied
  22           !$omp atomic update
  23             x = x + 1
  24         !$omp end task
  25
  26         !$omp task detach (detach_event2) untied
  27           !$omp atomic update
  28             y = y + 1
  29           call omp_fulfill_event (detach_event1)
  30         !$omp end task
  31
  32         !$omp task untied
  33           !$omp atomic update
  34             z = z + 1
  35           call omp_fulfill_event (detach_event2)
  36         !$omp end task
  37       !$omp end taskgroup
  38     !$omp end parallel
  39   !$omp end target
  40
  41   if (x /= thread_count) stop 1
  42   if (y /= thread_count) stop 2
  43   if (z /= thread_count) stop 3
  44 end program