RE: reference to handle / handle to reference

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From: Chris Lyon [MSFT] (clyon_at_online.microsoft.com)
Date: 01/14/05 

Date: Fri, 14 Jan 2005 20:27:52 GMT

As far as I know, there's no conversion between an object reference and an Int32, unless you pin objects using GCHandles and get their associated IntPtrs.

Also, if you're storing references in a Hashtable, then you are affecting the garbage collector by holding references to the objects, so they'll never get collected.

Even if references are stored internally as numbers in a GC table, there's no way for managed code to access it.

Hope that helps
-Chris

--------------------

>
>i'm looking for a possibility in C# to get a unique Int32 handle for an
>object reference. This handle must later (within the same process of course)
>be convertible back to an object reference (call it handle or pointer or
>whatever...).
>at the moment i'm working with a Hashtable Int32 to Object, but i want to
>optimize this. I know it is possible to work with pointers in unsafe code
>blocks, but as far as i know these pointer remain valid only within these
>blocks, or when they are pinned. and i don't want to disturb the garbage
>collector.
>i mean, somehow a reference must be a number anyway, perhaps an index within
>some garbage collector table, or am i wrong?
>
> 

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