Function Perl_hv_common 

pub unsafe fn Perl_hv_common(
    my_perl: *mut PerlInterpreter,
    hv: *mut HV,
    keysv: *mut SV,
    key: *const c_char,
    klen: STRLEN,
    flags: c_int,
    action: c_int,
    val: *mut SV,
    hash: U32,
) -> *mut c_void

thx shim for crate::Perl_hv_common.