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Date: 2000-08-16 (14:10)
From: David McClain <dmcclain@a...>
Subject: Re:_Interfaçage_C/CAML
Many thanks for pointing this error out... I had inadvertantly used the
incorrect Store_... form twice on finalized structures in my bulk of code,
although I have never experienced any problems from it... But just to be
safe I read the message in the archives and went through by stuff to clean
it up...

- David

-----Original Message-----
From: David Mentré <>
To: Markus Mottl <>
Cc: Nicolas Joliot <>;
Date: Monday, August 14, 2000 9:49 AM
Subject: Re: Interfaçage C/CAML

>Markus Mottl <> writes:
>> It seems that a common bug has struck again: using "Store_{whatever}" in
>> C-interfaces is only allowed (and then mandatory) with structured blocks.
>> Using it for anything else may crash the GC.
>I would say that Store_{whatever} macros are useful for data structures
>that are created in the C-world but should be managed (and destroyed) in
>the OCaml-world, WITHOUT any further access on the data by the C
>part. For all other cases, use the Field_{whatever} macros. With this
>macro, the OCaml GC won't try to have a look at your C data structures.
>By the way, Markus has already found a bug like this in my own code. See
>this message for further details on how the bug is triggered :
>I hope it helps,
> --
> Opinions expressed here are only mine.