1C MP+pooncerelease+poacquireonce 2 3(* 4 * Result: Never 5 * 6 * This litmus test demonstrates that smp_store_release() and 7 * smp_load_acquire() provide sufficient ordering for the message-passing 8 * pattern. 9 *) 10 11{} 12 13P0(int *buf, int *flag) // Producer 14{ 15 WRITE_ONCE(*buf, 1); 16 smp_store_release(flag, 1); 17} 18 19P1(int *buf, int *flag) // Consumer 20{ 21 int r0; 22 int r1; 23 24 r0 = smp_load_acquire(flag); 25 r1 = READ_ONCE(*buf); 26} 27 28exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *) 29