Function soisdisconnected

freebsd/kern/uipc_socket.c:4056–4083

}

void
soisdisconnected(struct socket *so)
{

	SOCK_LOCK(so);

	/*
	 * There is at least one reader of so_state that does not
	 * acquire socket lock, namely soreceive_generic().  Ensure
	 * that it never sees all flags that track connection status
	 * cleared, by ordering the update with a barrier semantic of
	 * our release thread fence.
	 */
	so->so_state |= SS_ISDISCONNECTED;
	atomic_thread_fence_rel();
	so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING);

	if (!SOLISTENING(so)) {
		SOCK_UNLOCK(so);
		SOCKBUF_LOCK(&so->so_rcv);
		socantrcvmore_locked(so);
		SOCKBUF_LOCK(&so->so_snd);
		sbdrop_locked(&so->so_snd, sbused(&so->so_snd));
		socantsendmore_locked(so);
	} else
		SOCK_UNLOCK(so);
	wakeup(&so->so_timeo);
}

/*
 * Make a copy of a sockaddr in a malloced buffer of type M_SONAME.