Conspiracy Theory #1

[Denis Koroskin]

On Sat, 21 Nov 2009 05:57:48 +0300, Rainer Deyke <rainerd at eldwood.com>  
wrote:

> dsimcha wrote:
>> == Quote from Rainer Deyke (rainerd at eldwood.com)'s article
>>> Yes, but a moving GC needs to be 100% precise, not 99.99999%.
>>
>> Not if you allow pinning, which we'd need anyhow for untyped,  
>> conservatively
>> scanned memory blocks.
>
> If you allow pinning then you no longer get the full benefits of a
> moving gc.  It would be nice to be able to trade untyped, conservatively
> scanned memory blocks for a better gc.
>
>

Pinning is a must-have if you want communicate with code written in other  
languages (C, for example).
Casting from Object to void* would be forbidden, use void* pinnedAddress =  
GC.pin(obj); (or similar) instead.