weiss@ENCORE.COM (Rick Weiss) (05/01/91)
I am attempting to use the RPC mechanism in the Dispatch library and although I have been successful in invoking rpc's with arguments, I am having difficulty in sending back a return value. Is it possible to return a value? Has anyone done this, and do you have examples? Thanks
interran@lurch.Stanford.EDU (John Interrante) (05/03/91)
Yes, you can send back a return value to the caller. You need something like this (I/O error checking omitted): // Program sending a RPC call. int DerivedRpcWriter::foobar(int data) { int reply; server() << RpcHdr(FOOBAR) << data; server() >> reply; return reply; } // Another program receiving the RPC call and replying to it. This // function is a static member function (no 'this'), so that's why // client and everything else is passed in as arguments. void DerivedRpcReader::foobar(RpcReader*, RpcHdr&, rpcstream& client) { int data, reply; client >> data; ... client << reply << flush; } I haven't had time to start using the Dispatch library in a new project, so I don't have a more complete example yet. -- John Interrante / interran@lurch.stanford.edu