John I'm not quite sure what you mean. I think you are saying that this is a reason it's important to have Haskell finalizers, but I'm not sure. How would you like to write a paragraph or two to explain the issue, and we can put it in the document? That way it would say what you mean.
Simon | -----Original Message----- | From: John Meacham [mailto:[EMAIL PROTECTED]] | Sent: 14 October 2002 22:22 | To: [EMAIL PROTECTED] | Subject: Re: Finali[zs]ers | | I dont have cvs write access but you should mention something about | expressing gc dependencies between ForeignPtr's. the only two ways to do | this in the current haskell systems are | * weak pointers | * touchForeignPtr from the finalizer of another ForeignPtr | | if the second one is not allowed by restricting us to C only finalizers, | then the first needs to be added into the FFI, (or some other mechanism | invented). I consider this functionality vital for any non-trivial use | of ForeignPtr, and it becomes more important as we move more stuff to C | land, as C structures become more common. | | for more info on the use of this, see the FFI touchForeignPtr | documentation and the paper describing Weak pointers in ghc. the fact | that multiple people saw the need for this and came up with solutions | probably says something about its usefulness. | John | | On Mon, Oct 14, 2002 at 06:16:05PM +0100, Simon Marlow wrote: | > > Thanks to everyone who has contributed to this discussion so | > > far. Since | > > there are a lot of subtle points to be considered at once, I | > > thought I'd | > > try to write a summary of the issues raised so far. | > > | > > I'll put something in the repository so we can all hack on it. | > > Hopefully I'll have something ready later today. | > | > oops, I should have mentioned that if you just want to read the | > document, it will be available here: | > | > | > http://cvs.haskell.org/cgi-bin/cvsweb.cgi/haskell-report/ffi/finalizers. | > txt | > | > just as soon as the CVS web server updates its repository. | > | > Cheers, | > Simon | > | > _______________________________________________ | > FFI mailing list | > [EMAIL PROTECTED] | > http://www.haskell.org/mailman/listinfo/ffi | | -- | ------------------------------------------------------------------------ --- | John Meacham - California Institute of Technology, Alum. - [EMAIL PROTECTED] | ------------------------------------------------------------------------ --- | _______________________________________________ | FFI mailing list | [EMAIL PROTECTED] | http://www.haskell.org/mailman/listinfo/ffi _______________________________________________ FFI mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/ffi
