There are some useful guidelines hidden in section 8.2.3 of the GHC user's guide: http://www.haskell.org/ghc/docs/latest/html/users_guide/sec-ffi-ghc.html#AEN 10578 And Alistair Reid answers a similar question I asked: http://www.reid-consulting-uk.ltd.uk/docs/ffi-Common_Problems.html (Common Problems: Are Ptr values deallocated?) In the current CVS code newCString redirects to newCAString, which uses mallocArray (or newArray), and which also states that storage must be freed: http://cvs.haskell.org/cgi-bin/cvsweb.cgi/fptools/libraries/base/Foreign/C/S tring.hs?rev=1.14 You can also see that Foreign.Marshal.Utils.new uses malloc: http://cvs.haskell.org/cgi-bin/cvsweb.cgi/fptools/libraries/base/Foreign/Mar shal/Utils.hs?rev=1.12
-----Original Message----- From: Peter Simons [mailto:simons@cryp.to] Sent: 25 September 2004 21:38 To: glasgow-haskell-users@haskell.org Subject: newCString -- to 'free' or not?
When I create a CString with Foreign.C.String.newCString, do I have to 'free' it after I don't need it anymore? Or is there some RTS magic taking place?
How about Foreign.Marshal.Utils.new and all those other newXYZ functions?
Peter
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