Re: Calling Ada proceedures from a C program

[dkristol@pollock.artists (David Kristola)]

In article 1@nnrp1.deja.com, rekennedy@my-deja.com () writes:
>I'm having trouble getting the same thing to work for strings. For the
>strings, I ended up using the "char_ptr" type from Interfaces.C.Strings.
>On the c-side, the values are char *, on the Ada-side, they are
>char_ptr.  The C calls the Ada procedure without a problem, until the
>code starts to return to the C, passing the value back.  At that point,
>it raises an access violation.  Still not sure what I'll have to do to
>get this working. If anyone has done this, I'd really appreciate any
>advice on it.
>
>I'll list the specs, headers, etc of the files here as an example of
>one way of doing this. Hopefully it will keep someone else from having
>the same frustrations looking for examples.
>
>
>Robert Kennedy
>Science Applications International Corporation (SAIC)

You did not include the body for My_Test_Package, so i am not
sure what it is doing, but the problem may be in the way out
parameters are handled.  As with the integer case, Ada may
use a pointer to the string pointer.  I am sure this is in the
documentation somewhere, but i do not have it close at hand.


--djk, keeper of arcane lore & trivial fluff
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