Neal Becker wrote:
> David Abrahams wrote:
>
>>
>> on Wed Jan 07 2009, Neal Becker <ndbecker2-AT-gmail.com> wrote:
>>
>>> This would require filling in tp_as_buffer field in the PyTypeObject
>>> structure for the
>>> class. Is this possible? Any clue how/where this could be done?
>>
>> I honestly don't know the answers to these questions, sorry.
>>
>
> As a workaround, I currently implemented an 'as_buffer' member function.
> For example:
>
> template<typename T>
> inline object as_buffer (ublas::vector<T> & m) {
> return object (handle<> (PyBuffer_FromReadWriteMemory
> ((void*)(&m.data()[0]), m.size()*sizeof(T))));
> }
Actually, this isn't all that useful. The problem is, you want to use
with_custodian_and_ward_postcall<0,1> on this. But you can't because buffer
object doesn't support weak references. So while the above can provide a
buffer interface, it has no idea of lifetime management.
I wonder whether python buffer object could be made to support weak refs? Of
course, if there was really a way to add a buffer interface to my
boost::python object that would be even better.
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