libgomp/testsuite/libgomp.c-c++-common/task-detach-6.c

   1 /* { dg-do run } */
   2
   3 #include <omp.h>
   4 #include <assert.h>
   5
   6 /* Test tasks with detach clause on an offload device.  Each device
   7    thread spawns off a chain of tasks, that can then be executed by
   8    any available thread.  */
   9
  10 int main (void)
  11 {
  12   int x = 0, y = 0, z = 0;
  13   int thread_count;
  14   omp_event_handle_t detach_event1, detach_event2;
  15
  16   #pragma omp target map (tofrom: x, y, z) map (from: thread_count)
  17     #pragma omp parallel private (detach_event1, detach_event2)
  18       {
  19         #pragma omp single
  20           thread_count = omp_get_num_threads ();
  21
  22         #pragma omp task detach(detach_event1) untied
  23           #pragma omp atomic update
  24             x++;
  25
  26         #pragma omp task detach(detach_event2) untied
  27         {
  28           #pragma omp atomic update
  29             y++;
  30           omp_fulfill_event (detach_event1);
  31         }
  32
  33         #pragma omp task untied
  34         {
  35           #pragma omp atomic update
  36             z++;
  37           omp_fulfill_event (detach_event2);
  38         }
  39       }
  40
  41   assert (x == thread_count);
  42   assert (y == thread_count);
  43   assert (z == thread_count);
  44 }