cffi-devel October 2009

cffi-devel@common-lisp.net

5 participants
5 discussions

[cffi-devel] Foreign structures by value
by Liam Healy 26 Aug '10

26 Aug '10

I have written Foreign Structures By Value (FSBV) to allow calling foreign functions while passing or returning structures by value. It uses CFFI and libffi. It currently provides two macros for users, fsbv:defcstruct and fsbv:foreign-funcall, which are used exactly like their CFFI counterparts. It works for small test cases I've tried, but probably could use some improvement. If the keepers of CFFI are interested, I would be happy for it to be included in CFFI. In the meantime, it can be found here: http://repo.or.cz/w/fsbv.git Thank you. Liam

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[cffi-devel] %load-foreign-library on SBCL
by Elliott Slaughter 27 Jan '10

27 Jan '10

Hi, I have a question about the implementation of %load-foreign-library on SBCL. It seems that the call to load-shared-object remembers the absolute pathname to the library that is loaded unless :dont-save t is used. This causes portability issues for my application, which can't load from the same path when used on different systems. Is there any reason to choose this behavior? Of course, with :dont-save t, the user then has to call use-foreign-library again when starting up from the saved image, but I find this preferable to the crash I receive otherwise. An example patch is included below. Thanks. --- src/cffi-sbcl.lisp~ 2009-04-14 19:33:40.000000000 -0700 +++ src/cffi-sbcl.lisp 2009-04-03 15:28:37.000000000 -0700 @@ -324,7 +324,7 @@ (defun %load-foreign-library (name path) "Load a foreign library." (declare (ignore name)) - (load-shared-object path)) + (load-shared-object path :dont-save t)) ;;; SBCL 1.0.21.15 renamed SB-ALIEN::SHARED-OBJECT-FILE but introduced ;;; SB-ALIEN:UNLOAD-SHARED-OBJECT which we can use instead. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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[cffi-devel] XCVB patch for CFFI
by Faré 23 Oct '09

23 Oct '09

Here is what I use to compile Bordeaux-Threads with XCVB. Is it possible to apply it upstream? [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] It is not recognized in the full amplitude of the word that all freedom is essentially self-liberation -- that I can have only so much freedom as I procure for myself by my ownness. -- Max Stirner

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[cffi-devel] extended bitfield syntax
by Bart Botta 02 Oct '09

02 Oct '09

A few weeks ago on #lisp I suggested extending the defbitfield syntax to allow defining elements in terms of preceding elements in the bitfield (see http://paste.lisp.org/display/87065 for a sample usage and implementation). Does this sound like something that would be worth adding to cffi? -- 3b

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[cffi-devel] Purpose of libtest32.so in test suite?
by Jean-Claude Beaudoin 02 Oct '09

02 Oct '09

Hello, I have been running the cffi's test suite on my oldish pentium 4 for a while now and all is fine with it; but now I decided to port my software to an amd64 Athlon X2 and the test suite of cffi blows up trying to build libtest32.so. Here is what it prints out: ------------------------------------------ ; loading system definition from ; /home/Jean-Claude/.libs/systems/trivial-features.asd into ; #<ASDF1 package> ; registering #<SYSTEM TRIVIAL-FEATURES 34643616> as TRIVIAL-FEATURES gcc -m32 -o libtest32.so -shared -Wall -std=c99 -pedantic -g -fPIC libtest.c In file included from /usr/include/features.h:376, from /usr/include/stdio.h:28, from libtest.c:34: /usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: No such file or directory make: *** [libtest32.so] Error 1 Debugger called in: #<process SI:INITIAL 00000000010b4d20>. erred while invoking #<ASDF:COMPILE-OP (:VERBOSE NIL) 34714464> on #<CFFI-TESTS-SYSTEM::C-TEST-LIB "libtest" "cffi-tests" 34716192> --------------------------------------------------------------------- This is under Fedora 11 by the way. What purpose does libtest32.so serve if there is a libtest.so? Can I simply cut out all this "32" library thing? Thanks, Jean-Claude Beaudoin

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cffi-devel October 2009