From: timsuth@... (Tim Sutherland)
Date: 2004-11-24T17:58:01+09:00
Subject: Re: Ruby DL::Importable struct issue

In article <Vv-dnXwGIanSqTncRVn-sQ@rogers.com>, Kevin Howe wrote:
>>>I get the following error
>>>(eval):2 in '[]': unsupported type 'p' (DL::DLTypeError)
>>>  from (eval):2:in 'bp'
>
>> Try "char* bp" or "unsigned char* bp".
>
>"char* bp" produces the same error, but with type 's' instead of type 'p'.
>"unsigned char*" produces an "invalid element" error. I also tried "uint*
>bp" and "int* bp", but they give the same original error.

Okay, this is a bug in newer versions of the dl extension.

e.g. current CVS ruby/ext/dl/sample/libc.rb fails with
10
true
false
"ab"
(eval):5:in `call': unsupported type `p' (DL::DLTypeError)
        from (eval):5:in `qsort'
        from libc.rb:62


$ ruby -v
ruby 1.9.0 (2004-11-24) [i686-linux]

There are a couple of places in ptr.c which do a `switch' on the type ('I',
'S' etc.) but only handle upper-case types like 'P' and not lower-case like
'p' (the latter are the pointer versions).

`rb_dlptr_aref' and `cary2ary' in particular.