C S+fencemboncerelease+pooncerelease Hash=addfcf5e68411ba2efa23b82e74a09c7 Cycle=PodRWOnceRelease WseReleaseOnce FenceMbdWWOnceRelease RfeReleaseOnce Relax=RfeReleaseOnce WseReleaseOnce Safe=FenceMbdWW PodRWOnceRelease Generator=diy7 (version 7.46+3) Prefetch=0:x=F,0:y=W,1:y=F,1:x=W Com=Rf Ws Orig=FenceMbdWWOnceRelease RfeReleaseOnce PodRWOnceRelease WseReleaseOnce {} P0(int* x,int* y) { WRITE_ONCE(*x,2); smp_mb(); smp_store_release(y,1); } P1(int* x,int* y) { int r0 = READ_ONCE(*y); smp_store_release(x,1); } Observed x=2; 1:r0=1;
C11 equivalent:
C S+fencemboncerelease+pooncerelease Hash=addfcf5e68411ba2efa23b82e74a09c7 Cycle=PodRWOnceRelease WseReleaseOnce FenceMbdWWOnceRelease RfeReleaseOnce Relax=RfeReleaseOnce WseReleaseOnce Safe=FenceMbdWW PodRWOnceRelease Generator=diy7 (version 7.46+3) Prefetch=0:x=F,0:y=W,1:y=F,1:x=W Com=Rf Ws Orig=FenceMbdWWOnceRelease RfeReleaseOnce PodRWOnceRelease WseReleaseOnce {} P0(atomic_int* x,atomic_int* y) { atomic_store_explicit(x,2,memory_order_relaxed); atomic_thread_fence(memory_order_seq_cst); atomic_store_explicit(y,1,memory_order_release); } P1(atomic_int* x,atomic_int* y) { int r0 = atomic_load_explicit(y,memory_order_relaxed); atomic_store_explicit(x,1,memory_order_release); } exists (x=2 /\ 1:r0=1)