Re: [LuaJIT ffi] dynamic loading of DLL functions

[Mike Pall <mikelu-1107@...>]

Thomas Lauer wrote:
> I am trying to call a few Win32 functions which may or may not be
> present in the target DLL.
> 
> I've found no simple (ie fast) way to check whether a cdef'd function
> has actually been found in the relevant namespace. ffi.typeof() etc all
> seem to throw an error if the function name could not be resolved. Of
> course, I could catch that but I'd assume this scenario is sufficiently
> common to warrant some sort of API. Perhaps I did miss something
> obvious?

pcall() is your friend. If you have millions of symbols to look
up, consider using GetProcAddress() instead (like you would in C).

--Mike