newCString -- to 'free' or not?

[Bayley, Alistair]

> And Alistair Reid answers a similar question I asked:

Sorry... s/Alistair/Alastair/

> -----Original Message-----
> From: Bayley, Alistair [mailto:Alistair_Bayley at ldn.invesco.com] 
> Sent: 27 September 2004 08:37
> To: 'Peter Simons'; glasgow-haskell-users at haskell.org
> Subject: RE: newCString -- to 'free' or not?
> 
> 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-ff
> i-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/ba
> se/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/ba
> se/Foreign/Mar
> shal/Utils.hs?rev=1.12
> 
> 
> 
> > -----Original Message-----
> > From: Peter Simons [mailto:simons at cryp.to] 
> > Sent: 25 September 2004 21:38
> > To: glasgow-haskell-users at 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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