1C WRC+poonceonces+Once 2 3(* 4 * Result: Sometimes 5 * 6 * This litmus test is an extension of the message-passing pattern, 7 * where the first write is moved to a separate process. Note that this 8 * test has no ordering at all. 9 *) 10 11{} 12 13P0(int *x) 14{ 15 WRITE_ONCE(*x, 1); 16} 17 18P1(int *x, int *y) 19{ 20 int r0; 21 22 r0 = READ_ONCE(*x); 23 WRITE_ONCE(*y, 1); 24} 25 26P2(int *x, int *y) 27{ 28 int r0; 29 int r1; 30 31 r0 = READ_ONCE(*y); 32 r1 = READ_ONCE(*x); 33} 34 35exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0) 36