libgomp/testsuite/libgomp.c/cancel-parallel-2.c

   1 /* { dg-do run } */
   2 /* { dg-set-target-env-var OMP_CANCELLATION "true" } */
   3
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <omp.h>
   7
   8 static void
   9 foo (int *x)
  10 {
  11   #pragma omp parallel firstprivate(x) num_threads (32)
  12   {
  13     int thr = omp_get_thread_num ();
  14     switch (x[thr])
  15       {
  16       case 4:;
  17         #pragma omp cancel parallel
  18         break;
  19       case 3:
  20         #pragma omp task
  21         usleep (1000);
  22         #pragma omp task
  23         usleep (2000);
  24         #pragma omp task
  25         usleep (4000);
  26         break;
  27       case 2:
  28         usleep (1000);
  29         /* FALLTHRU */
  30       case 1:;
  31         #pragma omp cancellation point parallel
  32         break;
  33       }
  34     #pragma omp barrier
  35     if (omp_get_cancellation ())
  36       abort ();
  37   }
  38 }
  39
  40 int
  41 main ()
  42 {
  43   int i, j, x[32] = { 0, 1, 2, 4, 2, 2, 1, 0 };
  44   foo (x);
  45   for (i = 0; i < 32; i++)
  46     {
  47       for (j = 0; j < 32; j++)
  48         x[j] = rand () & 3;
  49       x[rand () & 31] = 4;
  50       foo (x);
  51     }
  52   return 0;
  53 }