Function exonum_librocksdb_sys::rocksdb_comparator_create

pub unsafe extern "C" fn rocksdb_comparator_create(
    state: *mut c_void, 
    destructor: Option<unsafe extern "C" fn(_: *mut c_void)>, 
    compare: Option<unsafe extern "C" fn(_: *mut c_void, _: *const c_char, _: size_t, _: *const c_char, _: size_t) -> c_int>, 
    name: Option<unsafe extern "C" fn(_: *mut c_void) -> *const c_char>
) -> *mut rocksdb_comparator_t