libgomp/testsuite/libgomp.fortran/task-detach-7.f90

   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
   7 program 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
  42 end program