You mean I have to use a type like StablePtr (IORef Stuff)? Because there I can only "peek" (deRefStablePtr) the pointer, not "poke" it.
I take it I should return to C a StablePtr to the new value if I don't want to use IORefs... Or else I have to use regular Ptrs with Foreign.Marshall.Alloc.malloc 2012/2/12 Antoine Latter <aslat...@gmail.com> > On Sun, Feb 12, 2012 at 3:09 PM, Yves Parès <yves.pa...@gmail.com> wrote: > > But then, > > In use case 1), how can a Haskell function modify the data addressed? > > > > > http://hackage.haskell.org/packages/archive/base/latest/doc/html/Foreign-StablePtr.html#v:deRefStablePtr > > Antoine >
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