[Pyrex] Re: Is this example correct?

[Edward C. Jones]

Thanks. I had a feeling that it was rediculous to malloc small structs.

Ed Jones

Pedro Rodriguez wrote:

>On Mon, 05 May 2003 22:18:15 +0000, Edward C. Jones wrote:
>
>  
>
>>Is the code below correct? Can I reduce the number of calls to malloc? 
>>Any ideas for improvement?
>>
>>    
>>
> 
>[...code snipped...]
>
>Sorry for this late question, but I am not familiar with the extension
>types and I may be missing something.
>
>The examples provided by Edward perform allocation/deallocation at
>initialisation/destruction of the object. 
>
>Is there any pitfall to turn this into the following form, where no
>specific allocation is required:
>
>cdef class TemP__Num:
>     # --> replace 't' as a pointer to Num into a full Num
>     cdef Num t
>
>     def __new__(self, i=0, x=0.0):
>         # Removed [m]allocation of 't'
>         if i != 0 and x != 0.0:
>             raise TypeError, 'both i and x are non-zero'
>         if x != 0.0:
>             self.t.x = x
>         else:
>             self.t.i = i
>
>     def __dealloc__(self):
>         # Removed freeing 't'
>         pass
>
>     ...
>
>     def ToPointer(self):
>         # Use '&' on t
>         return  PyCObject_FromVoidPtrAndDesc(&(self.t), 'type Num*', NULL)
>
>  
>