Thanks. I was meant to ask ForeignPtr as well.
On Mon, Jan 14, 2019 at 6:59 AM Sylvain Henry
Hi,
Ptr has no finalizer: you have to explicitly free the attached memory if necessary.
You can use ForeignPtr to associate finalizers to a pointer: finalizers are functions that are called when the ForeignPtr object is to be collected by the GC. GHC can't track if the pointer is still stored/used by the C lib though.
Hope that helps, Sylvain
On 12/01/2019 07:16, Magicloud Magiclouds wrote:
Hi,
Say I have some data, and `poke` into a Ptr. Then I pass the Ptr to some function in C lib. The C lib stores the Ptr somewhere to use later.
My question is, how does GHC handle the finalizing of the Ptr? Does it track the "used by foreign lib"?
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