Copyright 1992 Digital Equipment Corporation.
Distributed only by permission.
Last modified on Wed Mar 16 12:22:38 PST 1994 by wobber
INTERFACE TCPSpecial;
IMPORT TCP, IP, Thread;
procedures
PROCEDURE EOF(t: TCP.T) : BOOLEAN;
Returns TRUE
if and only if there are no more bytes to be read from
this connection, and the connection indicates end-of-file (e.g.
the other side closed it.
PROCEDURE StartConnect(to: IP.Endpoint;
from: IP.Endpoint := IP.NullEndPoint): TCP.T
RAISES {IP.Error};
StartConnect
initiates a request to connect to the destination
specified by ep
. If msgT
is TRUE
then the results reader
and writer fields are of type MsgRd.T
and MsgWr.T
. Otherwise,
they are a normal reader and writer. The resulting T
can be used
to make read and write calls, but these may result in errors if
in fact the connection attempt is not successful.
PROCEDURE FinishConnect(
t: TCP.T; waitFor: LONGREAL := -1.0D0) : BOOLEAN
RAISES {IP.Error, Thread.Alerted};
FinishConnect
returns a BOOLEAN
to indicate if a connection
request initiated via StartConnect
has successfully completed.
A result of TRUE
indicates that it has. FALSE
means that the
connection request is still outstanding. If waitFor
is negative,
then FinishConnect
waits indefinitely until the operation completes,
otherwise it waits for a maximum of waitFor
seconds. The caller
should continue to call this procedure until it either returns TRUE
or raises an error.
END TCPSpecial.