libgomp/testsuite/libgomp.fortran/task-detach-9.f90

   1 ! { dg-do run }
   2
   3 ! Test tasks with detach clause.  Each thread spawns off a chain of tasks
   4 ! in a taskgroup, that can then be executed by any available thread.
   5
   6 program task_detach_9
   7   use omp_lib
   8
   9   integer (kind=omp_event_handle_kind) :: detach_event1, detach_event2
  10   integer :: x = 0, y = 0, z = 0
  11   integer :: thread_count
  12
  13   !$omp parallel private (detach_event1, detach_event2)
  14     !$omp taskgroup
  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       !$omp end task
  35     !$omp end taskgroup
  36   !$omp end parallel
  37
  38   if (x /= thread_count) stop 1
  39   if (y /= thread_count) stop 2
  40   if (z /= thread_count) stop 3
  41 end program