1C SB+poonceonces 2 3(* 4 * Result: Sometimes 5 * 6 * This litmus test demonstrates that at least some ordering is required 7 * to order the store-buffering pattern, where each process writes to the 8 * variable that the preceding process reads. 9 *) 10 11{ 12 int x; 13 int y; 14} 15 16P0(int *x, int *y) 17{ 18 int r0; 19 20 WRITE_ONCE(*x, 1); 21 r0 = READ_ONCE(*y); 22} 23 24P1(int *x, int *y) 25{ 26 int r0; 27 28 WRITE_ONCE(*y, 1); 29 r0 = READ_ONCE(*x); 30} 31 32exists (0:r0=0 /\ 1:r0=0) 33