[cffi-devel] stdcall callbacks on ClozureCL/win32

[Luís Oliveira]

On Thu, Jun 4, 2009 at 10:59 AM, Gary Byers <gb at clozure.com> wrote:
> I'm not sure if this is the only problem, but it seems that the most
> functions defined in the FreeGLUT library use the 'stdcall' calling
> convention

That shouldn't be a problem because CL-GLUT assumes a cdecl
freeglut.dll and doesn't specify :cconv :stdcall for the callbacks it
sets up. (And it works on other Lisps, hopefully not out of sheer
luck.)

I'm pretty sure that FreeGLUT can be built using cdecl instead of
stdcall and that I built one myself
(<http://common-lisp.net/~loliveira/tmp/freeglut.dll>) but that was a
while ago so I might be misremembering it.


> It looks like CFFI is generally familiar with this cdecl/stdcall stuff and
> has the infrastructure in place to do the right thing, but the CCL backend
> just doesn't implement it.

Correct. I just pushed a patch that implements that. I couldn't test
it because I don't have access to a Windows system at the moment so if
anyone is interested, please load the test suite, after compiling
libtest.c manually since cffi-tests.asd doesn't do that automatically
on Windows, and run (rt:do-test 'cffi-tests::callbacks.stdcall.1).

-- 
Luís Oliveira
http://student.dei.uc.pt/~lmoliv/