Re: 2.1 crash using module with ffi
- From: Geoff Leyland <geoff_leyland@xxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Fri, 24 Jan 2014 18:45:29 +1300
On 24/01/2014, at 6:37 pm, William Adams <william_a_adams@xxxxxxx> wrote:
> It's more like this situation:
>
> local buff = ffi.new("char[1024]");
> local contentType = ffi.new("int[1]");
> CFunction(buff, bufflen, contentType)
>
> -- return the correct struct based on contentType
> if contentType[0] == BITMAP24 then
> return ffi.cast("BITMAP24 *", buff);
> elseif contentType[0] == BITMAP32 then
> return ffi.cast("BITMAP32 *", buff);
> end
Ouch. But could you use malloc?
local buff = ffi.C.malloc(1024);
local contentType = ffi.new("int[1]");
CFunction(buff, bufflen, contentType)
-- return the correct struct based on contentType
if contentType[0] == BITMAP24 then
return ffi.gc(ffi.cast("BITMAP24 *", buff), ffi.C.free);
elseif contentType[0] == BITMAP32 then
return ffi.gc(ffi.cast("BITMAP32 *", buff), ffi.C.free);
end
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