[okl4-developer] Building an iguana server

[Charles Wong]

Hi!

On 26/03/2008, at 4:29 AM, Jorge Torres wrote:

> Hi Remy,
>
>
> The uuid is indeed an Universal Unique IDentifier and the only way  
> to keep
> it unique is to be carefull, am i right ?
> Yes

The uuid need only be unique within an idl4 file.

>
>
> How does the interface system work and especially how do i use it on  
> the
> other side (client) ?

In addition to generating the [name]_serverloop.c and the  
[name]_serverdecls.h files, magpie also produces a [name]_client.h  
file that contains the corresponding client functions.  These client  
functions are called from the library code.

To illustrate:

[idl4]

interface foo
{
	void bar(int a, int b, char c);
}

will generate an interface function foo_bar(a,b,c) for clients to  
call.  The arguments a, b, and c are automatically marshalled into  
message registers and sent over IPC.

On the server side, a function foo_bar_impl(caller, a, b, c, env)  
should contain the actual implementation.  caller identifies the  
client that made the call; env can be ignored.

>
> It uses the magpie idl compiler
>
> http://wiki.nyloncactus.com/doku.php?id=magpie:doc
>
>
> Which stuff logically belong to :
> - libs/[my_server]/ ?
> The libraries used for your server

libs/blah contains the interface that clients have access to.

>
>
> - iguana/[my_server]/ ?
> YOur sever main() code

iguana/blah contains the server implementation code.

>
>
> Is having a file like libs/[my_server]/include/interfaces/ 
> [my_server].idl4
> the only way to have [my_server]_serverdecls.h and
> [my_server]_serverloop.c generated ?
>
> You can do your own serverloop inside your servers main,

It is entirely possible to write your own servereloop, however using  
an idl4 file is helpful if what you're trying to do is non-trivial.


Cheers
Charles

>
> All the best,
>
> Jorge
>
>
> --
> Remy Gottschalk - rgottschalk at linagora.com
> Ingénieur informatique embarquée
> Groupe LINAGORA - http://www.linagora.com
> Tél.: +33(0)1 58 18 68 28 - Fax : +33(0)1 58 18 68 29
>
>
>
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