libgomp/testsuite/libgomp.c-c++-common/depend-mutexinout-1.c

   1 int
   2 main ()
   3 {
   4   int a, b, c, d;
   5   #pragma omp parallel num_threads (6)
   6   #pragma omp single
   7   {
   8     #pragma omp task depend(out: c)
   9       c = 1;
  10     #pragma omp task depend(out: a)
  11       a = 2;
  12     #pragma omp task depend(out: b)
  13       b = 3;
  14     /* The above 3 tasks can be scheduled in any order.  */
  15     #pragma omp task depend(in: a) depend(mutexinoutset: c)
  16       c += a;
  17     #pragma omp task depend(in: b) depend(mutexinoutset: c)
  18       c += b;
  19     /* The above 2 tasks are mutually exclusive and need to wait
  20        for the first and second or first and third tasks respectively.  */
  21     #pragma omp task depend(in: c)
  22       d = c;
  23     /* The above task needs to wait for the mutexinoutset tasks.  */
  24   }
  25   if (d != 6)
  26     __builtin_abort ();
  27   return 0;
  28 }