[SciPy-user] matrix inversion time (Python vs MATLAB)

David Cournapeau cournape@gmail....
Sat Jan 10 14:58:41 CST 2009


On Sun, Jan 11, 2009 at 4:59 AM, Sturla Molden <sturla@molden.no> wrote:
>
>> Microsoft real answer to DLL hell is manifest files (address and
>> version of a DLL), but it cannot be applied everywhere :(
>> Does COM handle DLL versions ?
>
> The idea is that a DLL is not just identified by a name, but by a number
> (the CLSID). The CLSID is stored in the registry and is looked up to get
> the fully qualified path of the DLL.

But what happens when you can't write to the registry ? Or is this per user ?

> The rules of COM specified that the
> CLSID should change whenever the version of the DLL changed.
> Unfortunately, developers broke this rule, so DLL hell persisted. But if
> the developer i honest and complies with this, COM does not not produce
> DLL Hell.


http://msdn.microsoft.com/en-us/library/ms973843.aspx#dplywithnet_sharing

It does not sound like COM is a good idea - according to MSDN's own
word, COM is responsible for DLL Hell. I actually quite like the GAC
principle - I think it would be nice for python itself to have
something similar. But AFAIK, it is not possible to use this for
unmanaged code, without any CLR involvement.

cheers,

David


More information about the SciPy-user mailing list