// Reads a message to the underlying pipe.
public Msg read() {
if (!in_active || (state != State.ACTIVE && state != State.PENDING)) return null;
Msg msg_ = inpipe.read();
if (msg_ == null) {
in_active = false;
return null;
}
// If delimiter was read, start termination process of the pipe.
if (msg_.isDelimiter()) {
delimit();
return null;
}
if (!msg_.hasMore()) msgs_read++;
if (lwm > 0 && msgs_read % lwm == 0) send_activate_write(peer, msgs_read);
return msg_;
}
// Returns true if the message is delimiter; false otherwise.
private static boolean is_delimiter(Msg msg_) {
return msg_.isDelimiter();
}