Issue1328

This is a basic patch that adds enough of _rawffi to actually run some
simple ctypes code. It should be fairly obvious how to proceed now.

Issues:
* make ant create a test .so. I have more tests, but unittest has no way
  to skip. Bummer
* I have disabled java security. jna has to be fixed somehow for that.
* More care is needed about field sizes/alignment, I want ant do it
  for me, hardcoding sucks.
* It's unfinished

but the example:
import ctypes
ctypes.CDLL('libc.so.6').time(0)

works on my machine :-)

out2.diff is against CPythonLib

I HATE ROUNDUP

I wanted to play around with this, so I applied both patches. Then ran
it, and typed in your example ... it failed because it couldn't import
ctypes. I look again and realized that you didn't include ctypes itself
... so I copied it out of my CPython install (Python v2.5.2 from Ubuntu
8.04.2 x64) The ctypes/__init__.py mentions something about being
v1.0.3. At this point I get:
Jython 2.5b3+ (trunk:6266M, Apr 27 2009, 21:48:35) 
[Java HotSpot(TM) 64-Bit Server VM (Sun Microsystems Inc.)] on java1.5.0_16
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/kfitch/projects/jython/dist/Lib/ctypes/__init__.py", line
155, in <module>
    _check_size(py_object, "P")
  File "/home/kfitch/projects/jython/dist/Lib/ctypes/__init__.py", line
143, in _check_size
    actual, required = sizeof(typ), calcsize(typecode)
struct.error: bad char in struct format
>>> 

I seems that the "P" char is not understood by the struct implementation
in Jython (it works in my CPython).

No, I included ctypes and out2.diff is a patch for that, but you need to
copy ctypes from CPythonLib on your own to dist (or link it or something).

I didn't yet figure out how to make jython pick up those :-)

Ahh... I get it now. I am a little slow sometimes :) ... anyway if you
want ctypes copied into the dist you can include the line:

ctypes/**

in the CPythonLib.includes file in the root directory of the project. 
Now I can run your test, and it segfaults, but I suspect that is because
I am running a 64bit box w/ 64bit java.

On Tue, Apr 28, 2009 at 4:27 AM, Kevin Fitch <report@bugs.jython.org> wrote:
>
> Kevin Fitch <kfitch42@gmail.com> added the comment:
>
> Ahh... I get it now. I am a little slow sometimes :) ... anyway if you
> want ctypes copied into the dist you can include the line:
>
> ctypes/**
>
> in the CPythonLib.includes file in the root directory of the project.
> Now I can run your test, and it segfaults, but I suspect that is because
> I am running a 64bit box w/ 64bit java.
>

That is very likely true.

I created the branch called ctypes-via-rawffi, so those patches are no
longer valid. Please note that it is 32bit *only* for now.

There's a partial implementation of ctypes in Jython now. Completion will presumably be in 2.6.

Can this be closed now? The partial ctypes we have includes these patches right?

It loads the ctypes lib but not the util lib
from ctypes.util import find_library
ImportError: No module named util

Closing out in favor of #2148