On 02/04/2012 11:11 AM, Adam Preble wrote:
I am trying to run this on Win32, using Stackless Python 2.6, and Boost
1.47.
I am having a problem with passing a shared_ptr of a C++ object
implementing a C++ interface to a wrapper of a Python object
implementing a C++ interface. That's a mouthful, so I thought I'd
simplify the code. The thing is, I can't seem to get the wrapping
correct. If I can get this going, I can start adding complication to it
and see what the problem really is.
Basically, I have an interface that works with itself for communicating
stuff. There is a C implementation of it, and a Python implementation
of it. I have to write a wrapper. The Python implementation can
communicate with instances of the C implementation, but not vice versa.
When the C implementation calls the Python one, I get:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: No to_python (by-value) converter found for C++ type: class
boost::shared_ptr<class Communicatable>
The magic call is in the python script.
Python script
http://pastebin.com/DJ65tKEW
Header
http://pastebin.com/6BX8e6KA
Source (Boost.Python declarations here)
http://pastebin.com/s5YC1hyC
I have done similar wrappers like this before so I'm just befuddled
about why this time it hates me. The shared_ptrs are part of the larger
problem I'm trying to reproduce, so I want to incorporate them into this
test program. In the larger program, while doing a get_override() call
on a wrapper to an interface, I get a segfault inside the Python DLLs
while it tries to convert the shared_ptr. The last line I can see i
shared_ptr_to_python.hpp:
return converter::registered<shared_ptr<T>
const&>::converters.to_python(&x);
That's what I am eventually hoping to reproduce by shooting back and
forth all this stuff.
If I understand your intend correctly, I think your class_ definition
needs to be:
class_<Communicable,shared_ptr<CommunicableWrapper>,noncopyable>
(right now you have class_<CommunicableWrapper,...>)
Jim
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