RE: Making FFI callbacks call free() automatically when it's collected
- From: William Adams <william_a_adams@xxxxxxx>
- To: <luajit@xxxxxxxxxxxxx>
- Date: Fri, 20 Jul 2012 04:50:13 +0000
I did the pointer thing like the following, to try and be somewhat size
conscious:
function PointerToString(instance)
if ffi.abi("64bit") then
return string.format("0x%016x", tonumber(ffi.cast("int64_t", ffi.cast("void
*", instance))))
elseif ffi.abi("32bit") then
return string.format("0x%08x", tonumber(ffi.cast("int32_t", ffi.cast("void
*", instance))))
end
return nil
end
===============================
- Shaping clay is easier than digging it out of the ground.
http://williamaadams.wordpress.com
https://github.com/Wiladams
> Yes, thanks for the suggestion. I now just use:
>
> local function cdata_addr(cd) return tonumber(ffi.cast("int", cd)) end
>
> to produce the address' value, and use that as the key internally, to
> avoid the problem of cdata objects not suitable as the key directly.
>
> best,
> Johnson
>
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