The problem is that the application is based on a client-server model. The modules are loaded on both sides and communicate with each others counterpart on the other end. The messages are routed to the correct module based on the module ID stored in the packet. Thus it needs to be done at compile time itself so the client and server can share the values.
Another way is to generate a map of (server_side_ID --> module_name) on the server and send the map to the client before communication begins. The client can then use it to generate a (server_side_ID --> client_side_ID) map. This work but adds a horrible overhead (no matter how efficiently it is implemented) as the map will need consulting for every received packet. Quite unnecessary overhead IMO. At least if it can be done somehow at compile time. Any other ideas? :P Thanks Manohar ---------- Forwarded message ---------- From: Coder Bean <[email protected]> Date: Sat, Mar 27, 2010 at 4:56 AM Subject: Re: [twincling] Recursive Preprocessing? To: [email protected] What you are trying to do is essentially what all the component based framework's tried to achieve using UUID. However, IMHO, just checking whether the id is not zero cannot ensure that the modules don't have invalid ID. As two modules can be built with same id, in that case. If you want the ID's to be unique per session, you might want the host application to generate the ID's and assign it to each module. On Sat, Mar 27, 2010 at 6:52 AM, Manohar Vanga <[email protected]>wrote: > It is C++. I can use templates (although I would prefer to steer clear of > it for the time being). > > The problem is that I have written piece of code that dynamically loads > shared libraries at run time (dlopen/dlclose/dlsym). Each module must have a > unique ID and it needs to be checked for a correct value (!=0). I do this at > load time as well, but it would be great if there was a way to do the checks > at module compile time so people know of invalid ID's before the time of > loading. > > For now, I have written a small preprocessor which is "checking" the module > for correctness. Not the prettiest thing in the world, but it works. > > Thanks > Manohar > > On Fri, Mar 26, 2010 at 5:29 PM, coderbean <[email protected]> wrote: > >> >> On Mar 25, 2010, at 10:42 AM, Manohar Vanga wrote: >> >> Does anyone know if the following code can be made to work? Alternative >>> would also be appreciated: >>> >>> #define INIT_MODULE(id) \ >>> #if (id == 0)\ >>> #error "Invalid ID"\ >>> #else\ >>> #define __MODULE_ID__\ >>> int __module_id = id;\ >>> #endif >>> >>> The __MODULE_ID__ is required later on in the preprocessing. Any >>> suggestions? I would hate to have to sit and write my own preprocessor :-/ >>> >>> >> Can you please tell what exactly you are trying to achieve here? Is this C >> or C++? Can you use templates instead of preprocessor? >> >> Thanks >>> Manohar >>> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> >
