Re: [ANN] luajit-msgpack - with questions to Mike
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- Subject: Re: [ANN] luajit-msgpack - with questions to Mike
- From: Mike Pall <mikelu-1111@...>
- Date: 2011年11月25日 19:47:50 +0100
Alexander Nasonov wrote:
> - msgpack_unpack_next C function because LuaJIT doesn't support
> bool/_Bool in return type. If I change it to int (and "not ok"
> to "ok == 0"), v.lua from LuaJIT stops complaining about
> unsupported function. To do it properly you need to wrap
> msgpack_unpack_next but it'd be nice to hear from Mike about
> supporting bool in LuaJIT.
I've just pushed some changes to git HEAD. C functions with bool
return values are compiled now.
> I came accross this before with ffi.errno() function. It would be
> nice to have support for these functions but I presume it's not a
> trivial thing. Even for Mike ;-)
ffi.errno() is not compiled, because it's supposed to be called
only in the (uncommon) error path. You need to check the return
value of most standard C functions before you can assume a valid
errno value:
if ffi.C.foo() == -1 then
local err = ffi.errno() -- Uncommon error path.
...
error(...)
end
-- Continue on fast path.
--Mike