[Chicken-users] #invalid forwarded object using FFI callback

Greetings, I'm encountering the following error message inside a callback using Chicken's FFI interface: Error: (cdr) bad argument type: #invalid forwarded object Call history: pwent.scm:100: loop pwent.scm:56: ##sys#gc pwent.scm:56: g42 pwent.scm:24:

Re: [Chicken-users] #invalid forwarded object using FFI callback

.alyn.post. scripsit: I'm trying to read /etc/passwd using getpwent(3) and store each record returned in a scheme list. The very first thing I would try is switching to getpwent_r(), because the fact that getpwent() uses a static buffer internally may well be confusing Chicken. -- John

Re: [Chicken-users] #invalid forwarded object using FFI callback

I wish I could take that advice, but getpwent_r is not available on OpenBSD. I do take care to call it sequentially, and the call is not being made from, say, multiple Scheme threads. Invocation of each loop in the (let loop ...) would have to be reordered by the compiler (I don't believe that

[Chicken-users] 'f_125' undeclared with (declare (block))

I'm getting an error message when I use |(declare (block))|. Using the same code in my previous email about invalid forwarded object (repeated here), I declare it as an egg like so (the only change is wrapping it around a module): ++ csc -s -j pwent pwent.so pwent-egg.scm (module pwent

Re: [Chicken-users] foreign-lambda declaration for char**?

Hi Alyn, On 09/12/13 06:29, .alyn.post. wrote: What is the magic phrase to tell foreign-lambda a parameter is a char**? `(c-pointer c-string)` or `(c-pointer nonnull-c-string)` should do it. Cheers, Evan ___ Chicken-users mailing list

Re: [Chicken-users] foreign-lambda declaration for char**?

On Mon, Dec 09, 2013 at 08:41:59AM +1300, Evan Hanson wrote: Hi Alyn, On 09/12/13 06:29, .alyn.post. wrote: What is the magic phrase to tell foreign-lambda a parameter is a char**? `(c-pointer c-string)` or `(c-pointer nonnull-c-string)` should do it. Cheers, Evan Bless you