18c2ecf20Sopenharmony_ciC MP+pooncerelease+poacquireonce 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci(* 48c2ecf20Sopenharmony_ci * Result: Never 58c2ecf20Sopenharmony_ci * 68c2ecf20Sopenharmony_ci * This litmus test demonstrates that smp_store_release() and 78c2ecf20Sopenharmony_ci * smp_load_acquire() provide sufficient ordering for the message-passing 88c2ecf20Sopenharmony_ci * pattern. 98c2ecf20Sopenharmony_ci *) 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ci{} 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciP0(int *x, int *y) 148c2ecf20Sopenharmony_ci{ 158c2ecf20Sopenharmony_ci WRITE_ONCE(*x, 1); 168c2ecf20Sopenharmony_ci smp_store_release(y, 1); 178c2ecf20Sopenharmony_ci} 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ciP1(int *x, int *y) 208c2ecf20Sopenharmony_ci{ 218c2ecf20Sopenharmony_ci int r0; 228c2ecf20Sopenharmony_ci int r1; 238c2ecf20Sopenharmony_ci 248c2ecf20Sopenharmony_ci r0 = smp_load_acquire(y); 258c2ecf20Sopenharmony_ci r1 = READ_ONCE(*x); 268c2ecf20Sopenharmony_ci} 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ciexists (1:r0=1 /\ 1:r1=0) 29