libgomp/testsuite/libgomp.c-c++-common/task-detach-5.c

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