allocation of untagged structures

From: Douglas G. Danforth <"Douglas>
Date: Sun, 29 Dec 2002 12:06:15 -0500

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Folks,

I am attempting to do a very simple COM interface following
the suggestion in Platform-Specific Issues Using COM without
special Direct-To-COM compiler.

I had thought this would be easy but NEW cannot be used
to allocate untagged structures which are needed by COM.
So how can I allocate an arbitrary number of instances
of a COM object?

Must I count the number of bytes in the data structure
desired then allocate a BYTE array of that size
using NEW and then assign the address of the first
element of that array to an untagged pointer?

That doesn't seem too safe for when releasing the
data when the reference count goes to zero I somehow
must recapture the actual pointer to the BYTE array
and set it to zero for actual garbage collection.

How do I keep the reference count and garbage collection
processes separate?

-Doug
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Received on Sun Dec 29 2002 - 18:06:15 UTC