Function aeron_archive_persistent_subscription_is_live 

pub unsafe extern "C" fn aeron_archive_persistent_subscription_is_live(
    persistent_subscription: *mut aeron_archive_persistent_subscription_t,
) -> bool

Check if persistent subscription is live, i.e. reading messages from the live subscription without having a replay subscription.

@param persistent_subscription to check. @return true if live, false otherwise.