On Thursday 06 March 2003 10:55, Adrian Hey wrote: > On Tuesday 04 March 2003 12:36, Simon Peyton-Jones wrote: > > GHC does not copy big objects, so don't worry about the copying cost. > > (Instead of copying, it allocates big objects to (a contiguous series > > of) heap blocks, with no other objects in those blocks. Then the object > > can "move" simply by swizzling the heap-block descriptor.) > > Thanks, looks like it's option (1) then. Could you tell me what > Haskell type I have to use be able to pass a pointer to this binary > to C land (genuine address, not StablePtr). I don't think > the standard FFI allows this at all but, IIRC, the old ghc libraries > allowed you to do this with a mutable byte array.
Does anybody know the answer to this? please.. pretty please..:-) Sorry if this is a case of me failing to RTFM, but I don't think it is. Paragraph 8.1.1 of the users guide says.. "The types ByteArray and MutableByteArray may be used as basic foreign types (see FFI Addendum, Section 3.2). In C land, they map to (char *)." I can't find any way in the Base libs (or what's left of the old libs) to create a ByteArray or MutableByteArray, which leads me to suspect that they no longer exist. Should I use something else instead? Thanks -- Adrian Hey _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users