162306a36Sopenharmony_ciC LB+poacquireonce+pooncerelease 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci(* 462306a36Sopenharmony_ci * Result: Never 562306a36Sopenharmony_ci * 662306a36Sopenharmony_ci * Does a release-acquire pair suffice for the load-buffering litmus 762306a36Sopenharmony_ci * test, where each process reads from one of two variables then writes 862306a36Sopenharmony_ci * to the other? 962306a36Sopenharmony_ci *) 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci{} 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciP0(int *x, int *y) 1462306a36Sopenharmony_ci{ 1562306a36Sopenharmony_ci int r0; 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci r0 = READ_ONCE(*x); 1862306a36Sopenharmony_ci smp_store_release(y, 1); 1962306a36Sopenharmony_ci} 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ciP1(int *x, int *y) 2262306a36Sopenharmony_ci{ 2362306a36Sopenharmony_ci int r0; 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci r0 = smp_load_acquire(y); 2662306a36Sopenharmony_ci WRITE_ONCE(*x, 1); 2762306a36Sopenharmony_ci} 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ciexists (0:r0=1 /\ 1:r0=1) 30