linux/tools/memory-model/litmus-tests/CoWR+poonceonce+Once.litmus
<<
>>
Prefs
   1C 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
  12P0(int *x)
  13{
  14        int r0;
  15
  16        WRITE_ONCE(*x, 1);
  17        r0 = READ_ONCE(*x);
  18}
  19
  20P1(int *x)
  21{
  22        WRITE_ONCE(*x, 2);
  23}
  24
  25exists (x=1 /\ 0:r0=2)
  26