Hello Michael,
On 29. Sep 2011, at 21:41, Michael Pope [via Software] wrote:
> I have subclassed eq::Config and eq::Node. Call these classes EQConfig and
> EQNode respectively.
>
> I registerCommand in eq::server::Config with a command of
> eq::fabric::CMD_CONFIG_CUSTOM+1 on the mainQ (not really sure if that's the
> right queue - there's also a cmdQ)
They 'terminate' in the main thread and command thread, respectively.
> then in EQNode I registerCommand with a command of
> eq::fabric::CMD_NODE_CUSTOM+1.
>
> Then I define a packet with a std::wstring member variable 'commandString'.
> this packet has a function SetCommandString(const std::wstring& command)
> which sets the member variable as well as adjusting the size of the packet to
> include the string data.
Packets can only be PODs, since they are copied verbatim to the wire. To send
variable-length data, the connection has some methods to do so. The basic idea
is:
- The packet has an 8-byte stub of the array to send
- The sender passes the packet and array (string) to Connection::send
- The send call either copies the array into the stub or sends the Packet-8
bytes (aka header) and then the array, updating the size field accordingly
- The receiver receives the packet in one go and reads the data from the stub
position
Since these are really nitty-gritty details of Collage, I'm wondering if there
is not a more elegant way, e.g., serializing the string as part of an object,
to solve your problem. Even internally we're using this mechanism less and less
and rather use co::Objects. Have a look at eqPly::FrameData::setMessage. Maybe
you can describe why you're trying to send a string.
> Now, my problems start happening when I attempt to send the packet.
You are sending a C++ object with a pointer (the std::wstring), this can't work.
HTH,
Stefan.
--
View this message in context:
http://software.1713.n2.nabble.com/Sending-packets-containing-std-wstring-tp6845178p6846794.html
Sent from the Equalizer - Parallel Rendering mailing list archive at Nabble.com.
_______________________________________________
eq-dev mailing list
[email protected]
http://www.equalizergraphics.com/cgi-bin/mailman/listinfo/eq-dev
http://www.equalizergraphics.com
