Re: C/C++ calling convention

James Kanze <>
Mon, 30 Aug 2010 08:05:32 -0700 (PDT)
On Aug 30, 11:23 am, Goran Pusic <> wrote:

On Aug 29, 12:07 am, James Kanze <> wrote:

In theory, we really have to start by defining what we mean by
"OS". I'm an old timer---for me, the OS is the part of the code
which has to be executed in kernel mode: things like COM or the
GUI aren't directly part of the OS.

I bet you can beat that, too: OS are software interrupts that
are used to call into... Well, OS :-).

But more seriously, if you take e.g. Telephony API on Windows,
sure, you can use it without COM, but how would you not
consider it a part of the OS?

What is the telephony API? I've never heard of it, and I've
been doing some pretty low level Windows programming lately.
And if the name is anywhere relevant, how could you consider it
part of the OS?

(And there are probably Windows APIs that are strictly COM-
dependent, that is, there is no lower level C interface for
them at all).

There are certainly programs under Windows whose API is strictly
COM. Or something else completely.

And of course, as good people here noted, why would you not
consider assembly?

Because Windows doesn't define the assembler level API.

James Kanze

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