tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus

   1 C CoWR+poonceonce+Once
   2
   3 (*
   4  * Result: Never
   5  *
   6  * Test of write-read coherence, that is, whether or not a write to a
   7  * given variable and a later read from that same variable are ordered.
   8  *)
   9
  10 {}
  11
  12 P0(int *x)
  13 {
  14         int r0;
  15
  16         WRITE_ONCE(*x, 1);
  17         r0 = READ_ONCE(*x);
  18 }
  19
  20 P1(int *x)
  21 {
  22         WRITE_ONCE(*x, 2);
  23 }
  24
  25 exists (x=1 /\ 0:r0=2)