Function rmw_qos_profile_check_compatible 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn rmw_qos_profile_check_compatible(
    publisher_profile: NrosRmwQos,
    subscription_profile: NrosRmwQos,
    compatibility: *mut Type,
    reason: *mut c_char,
    reason_size: usize,
) -> NrosRmwRet

See nros/rmw_entity.h.

Safety

compatibility must be valid for writes; reason must be valid for reason_size bytes when non-NULL.