[erlang-questions] Generating skeleton linked-in driver code using an IDL?

Michael Truog <>
Tue Mar 10 06:50:15 CET 2009


Torbjorn Tornkvist wrote:
> Michael Truog <> writes:
>
>   
>> Jani Hakala wrote:
>>     
>>> ...
>>>
>>> I have looked at some of the code generation tools that are supposed
>>> to help developing linked-in drivers. They (ETDK, DryvErl and the
>>> proposed Foreign Function Interface) seem to focus on how to call
>>> C-functions. I would be more interested about a tool that could be
>>> used to define message structures and operations supported by a
>>> linked-in driver. Those operations would call C/C++ functions in a way
>>> that would not be visible outside the driver (facade pattern).
>>>
>>> ...
>>>       
>> I created the Generic Erlang Port Driver to have an easy way to 
>> automatically generate a port driver or port for C or C++.  The code 
>> generation does not rely on an idl file but instead uses 
>> boost::preprocess to use macros.  The code is still in development, but 
>> should provide another way of creating port drivers automatically.  The 
>> port drivers are generated only with usage of outputv, for efficiency.  
>> The message structure is determined from basic types passed with the 
>> native byte order.  A facade pattern could easily be added as an 
>> interface to the port driver.  You can find the code here:
>>
>> http://forum.trapexit.org/viewtopic.php?p=44406#44406
>>     
>
> I think 'gepd' should live as a nice little project of its own (e.g at
> github.com).
>
> --Tobbe
> (Ps. it reminds me about old IG (may it rest in peace):
>  http://www.tornkvist.org/gitweb?p=ig.git;a=summary )
>   
My hope is that gepd can be:
- An efficient and easy way to integrate between Erlang and C/C++
- Reusable code that supports hot code swapping for port drivers and ports

So, I want gepd to do more than just generate interfaces, but grow to be 
generic integration code for any C and C++ code.

The github address is:
http://github.com/okeuday/generic-erlang-port--driver-/tree/master

- Michael



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