// Writes a message to the underlying pipe. Returns false if the
// message cannot be written because high watermark was reached.
public boolean write(Msg msg_) {
if (!check_write()) return false;
boolean more = msg_.hasMore();
outpipe.write(msg_, more);
if (!more) msgs_written++;
return true;
}
// 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_;
}