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Tue Feb 2 08:23:05 CET 2010

Wrapping

Look at lysp[1] for inspiration.  The `dlsym' function seems to be
able to create functions that call directly into C without any manual
type conversion.

It passed the pointer from dlsym() to mkPsubr() which stores it in a
struct tagged with Psubr.  In apply() this tag is used to setup an
argument vector and dispatch to primcall().  This then uses
__builtin_apply() and __builtin_return().

I don't understand the arguments to __builtin_appl().  Check here[2]
for inspiration; eval() and funcall() in dlfcn?

Maybe it's better to use libffi[3]?

[1] http://piumarta.com/software/lysp/
[2] http://www.google.be/codesearch/p?hl=nl#5ge3gHPB4K4/gnu/glibc/glibc-2.5.tar.bz2%7CHT3Jwvgod1I/glibc-2.5/dlfcn/eval.c&q=__builtin_apply
[3] http://sourceware.org/libffi/

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