[ ghc-Bugs-1146118 ] gmp's memory management

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Bugs item #1146118, was opened at 2005-02-22 02:34
Message generated for change (Comment added) made by sigbjorn
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Category: Compiler (FFI)
Group: 6.4
Status: Open
Resolution: None
Priority: 4
Submitted By: Axel Simon (as49)
Assigned to: Nobody/Anonymous (nobody)
Summary: gmp's memory management

Initial Comment:
Simon M,

I assume ghc allocates the lumps of gmp integers still
on ghc's heap, making it impossible (or very awkward)
to interface to C libraries that use gmp themselves. Is
there a chance that you could use the default memory
allocator for lumps starting from ghc 6.4? That would
make my life much easier.

Thanks,
Axel.


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>Comment By: Sigbjorn Finne (sigbjorn)
Date: 2005-08-23 10:33

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It wouldn't be too hard to provide an entry point that let you 
enable/disable the use of GHC's custom allocator functions.

That entry point would be called by FFI wrapper code, either 
as a service by the RTS or manually by user code. Would 
only work in single (OS) threaded code, of course.

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Comment By: Simon Marlow (simonmar)
Date: 2005-02-22 02:49

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It's a known problem that you can't use GMP via the FFI from
your Haskell code in GHC, or use a C library that internally
uses GMP.  We should really use a private version of GMP
with function names that don't overlap, or better still
replace GMP altogether.

I don't think this is going to get fixed for 6.4, I'm afraid.



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