[Numpy-discussion] Pointers to arrays in C

Christopher Barker Chris.Barker@noaa....
Tue Jun 3 12:27:09 CDT 2008


Lisandro Dalcin wrote:
> I believe in your current setup there is no better way. But you should
> seriously consider changing the way of using array data. Storing bare
> pointers in the C side and not holding a reference to the object
> providing the data in the C side is really error prone.

exactly.

as you are passing a ndarray into your C code, another option is that 
you could increase the reference count to that array in your C code 
(Py_INCREF). Then it would not be destroyed on the Python side. However, 
you'd have to make sure you Py_DECREF it when you don't need it anymore.

There may be a way to tell the array that is does not "own" the data 
block also, but I don't know the numpy API enough to tell you how to do 
that.

-Chris


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