[Python-Dev] An updated extended buffer PEP

[Travis Oliphant]

Carl Banks wrote:
> Travis E. Oliphant wrote:
>> I think we are getting closer.   What do you think about Greg's idea 
>> of basically making the provider the bufferinfo structure and having 
>> the exporter handle copying memory over for shape and strides if it 
>> wants to be able to change those before the lock is released.
>
> It seems like it's just a different way to return the data.  You could 
> do it by setting values through pointers, or do it by returning a 
> structure.  Which way you choose is a minor detail in my opinion.  I'd 
> probably favor returning the information in a structure.
>
> I would consider adding two fields to the structure:
>
> size_t structsize; /* size of the structure */
Why is this necessary?  can't you get that by sizeof(bufferinfo)?

> PyObject* releaser; /* the object you need to call releasebuffer on */ 
Is this so that another object could be used to manage releases if desired?

-Travis