Macro PL_hash_state_w 

macro_rules! PL_hash_state_w {
    ($my_perl:expr) => { ... };
}

PL_hash_state_w — PERLVARA(G, hash_state_w, PERL_HASH_STATE_WORDS, PVT__PERL_HASH_WORD_TYPE)

Fixed-length array of PERL_HASH_STATE_WORDS elements.