susanne.olenson@tietoenator.com (Susanne) wrote in
news:24ba9bb0.0310210617.5f4bb576@posting.google.c om:
> When three or more messages are sent we can only read the first two
> messages from the socket. The rest of the messages arrives first when
> new messages are sent to the socket, all old messages are then read
> but only the two first of the new messages are read.

Sounds like a bug in your program. Motif does not read your socket, your
program does. Your program decides how much it wants to read.

Ken Lee, http://www.rahul.net/kenton/

Susanne wrote:
> When three or more messages are sent we can only read the first two
> messages from the socket. The rest of the messages arrives first when
> new messages are sent to the socket,

Sounds like you are using TCP sockets and expect one send to result in
one recv. That is not so: you need to implement the separation between
packets yourself (e.g. by starting each message with a byte count) and
repeat recv, buffering the bytes, until you know you have the whole message.

> all old messages are then read
> but only the two first of the new messages are read.
>
> We have used xtAppAddInput to register the callback function and
> xtAppMainLoop to wait for new messages.
>
> Any ideas what causes our problem?
>
> Thanks
> Susanne


--
Michel Bardiaux
Peaktime Belgium S.A. Bd. du Souverain, 191 B-1160 Bruxelles
Tel : +32 2 790.29.41

Michel Bardiaux wrote in message news:<3F9566AA.4020705@peaktime.be>...
> Susanne wrote:
> > When three or more messages are sent we can only read the first two
> > messages from the socket. The rest of the messages arrives first when
> > new messages are sent to the socket,
>
> Sounds like you are using TCP sockets and expect one send to result in
> one recv. That is not so: you need to implement the separation between
> packets yourself (e.g. by starting each message with a byte count) and
> repeat recv, buffering the bytes, until you know you have the whole message.
>
The messages are complete, the problem is that they do not arrive as
expected.
I have now found a bug in a program we are using for reading messages,
so the problem was not related to Motif as I first thought. Thanks for
your response anyway.

> > all old messages are then read
> > but only the two first of the new messages are read.
> >
> > We have used xtAppAddInput to register the callback function and
> > xtAppMainLoop to wait for new messages.
> >
> > Any ideas what causes our problem?
> >
> > Thanks
> > Susanne