[Numpy-discussion] Byte aligned arrays

Henry Gomersall heng@cantab....
Thu Dec 20 14:09:24 CST 2012


On Thu, 2012-12-20 at 21:05 +0100, Sturla Molden wrote:
> On 20.12.2012 20:57, Sturla Molden wrote:
> > On 20.12.2012 20:52, Henry Gomersall wrote:
> >
> >> Perhaps the DLL should go and read MS's edicts!
> >
> > Do you link with same same CRT as Python? (msvcr90.dll)
> >
> > You should always use -lmsvcr90.
> >
> > If you don't, you will link with msvcrt.dll.
> 
> Here is VS2008, which uses malloc from msvcr90.dll:
> 
> http://msdn.microsoft.com/en-us/library/ycsb6wwf(v=vs.90).aspx
> 
> "malloc is required to return memory on a 16-byte boundary"
> 
> If this does not happen, you are linking with the wrong CRT. When 
> building C extensions for Python, we should always link with the same 
> CRT as Python uses, unless you are 100% certain that CRT resources
> are 
> never shared with Python.

Is this something that can be established when using Cython? I haven't
experienced any problems so far (other than a now solved problem trying
to free memory allocated in FFTW which was down to a runtime mismatch).

Cheers,

Henry



More information about the NumPy-Discussion mailing list