Re: [Swig-user] %newobject equivalent for user defined %typemap(out) myType * for Python

[Anton D. <ant...@jh...>]

Thanks,

That worked.   Based on your answer I did a quick search on the share/ 
swig directory and found that very often the last parameter is:
   $owner | %newpointer_flags
Is this what I should use?

Anton



---
Anton Deguet, Research Engineer, ERC-CISST/LCSR, Johns Hopkins  
University
e-mail: ant...@jh..., iChat: ant...@ma...
office phone: 410-516-5261, cell phone: 410-790-0456
JHU, LCSR, CSEB 137b, 3400 North Charles Street, Baltimore, MD 21218,  
USA




On Jan 25, 2008, at 3:37 PM, Josh Cherry wrote:

>
>
> On Fri, 25 Jan 2008, Anton Deguet wrote:
>
>> I need to reproduce something similar to the %newobject for a method
>> returning a type (pointer on type ) handled by my own typemap(out)
>> myType *.
>>
>> In my typemap I end up using existing SWIG know types and call:
>> %typemap(out) myType * {
>>  ...
>>  resultobj = SWIG_NewPointerObj((void*)(result), typeInfo, 0);
>>  ...
>> }
>>
>> I looked at code generated for functions with %newobject without my
>> typemap and the difference is that the last parameter for
>> SWIG_NewPointerObj is:
>>  SWIG_POINTER_OWN |  0.
>>
>> So I have two questions:
>> - Is this the proper way to make sure Python/SWIG will delete the
>> object created by the C function when the reference counting will
>> reach  zero?
>> - How can I tell in my typemap is the function currently wrapped has
>> been "tagged" with %newobject or not?
>
> I think the thing to do is use $owner for that parameter, and SWIG  
> will
> substitute the appropriate thing, depending (in part) on %newobject.
>
> Josh
>
>
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