this post was submitted on 01 Jul 2023
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Monthly Ask Anything (July 2023) (kbin.social)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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Use this thread to ask any Haskell related questions which you think doesn't deserve a thread of their own. Ask away!

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[โ€“] [email protected] 0 points 1 year ago (1 children)

Why must FinalizerPtr take a foreign function that uses the ccall calling convention? Is there a concrete thing preventing GHC from accepting capi?

[โ€“] [email protected] 1 points 1 year ago

I suspect that comment predates the existence of capi and is trying to avoid having some other actual calling convention like stdcall because the function pointer is actually invoked from some C code in the RTS. capi is a sort of pseudo-calling-convention in that it generates some C code and then calls that stub.

Have you tried using a capi defined funptr there to see what happens?