Re: Dispatching callback handed over to C

[Maciej Sobczak <see.my.homepage@gmail.com>]

On 3 Kwi, 09:19, Natasha Kerensikova <lithium...@gmail.com> wrote:

> The problem I'm facing currently is binding to a very common idiom for
> callback in C.

[...]

I had to solve this poblem in the context of the YAMI4 poject and I
managed to get the essential parts of the solution here:

http://inspirel.com/articles/Polymorphic_Callbacks_Ada_Cpp.html

The callback, as seen by Ada, is polymorphic (the user sees it as a
dipatching call). The solution does not involve any compiler-specific
magic any more than what could be expected, so should be quite
portable.

Note that this article presents complete solution for Ada/C++ binding,
but since there is a C intermediary layer involved anyway, you might
consider it to be a Ada/C solution as well and use that part only if
this is what you need.

--
Maciej Sobczak * http://www.inspirel.com