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Message-ID: <008e01c176ff$65579060$578208d2@itdomain.net.au>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: <cygwin-developers AT cygwin DOT com>
References: <20011127014725 DOT GA13222 AT redhat DOT com>
Subject: Re: consistent version of Interlocked* functions
Date: Tue, 27 Nov 2001 15:48:14 +1100
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----- Original Message ----- 
From: "Christopher Faylor" <cgf AT redhat DOT com>
To: <cygwin-developers AT cygwin DOT com>
Sent: Tuesday, November 27, 2001 12:47 PM
Subject: consistent version of Interlocked* functions


> A while ago, I wrote (or acquired -- can't remember exactly) some inline
> assembly versions of the Interlocked* functions but never ended up
> adding them to cygwin.
> 
> It occurred to me today that I should dust these off again and use them
> in the cygwin source.  Why?  In addition to the fact that they should be
> faster than the ones available from the library, they also are
> consistent on all versions of Windows.  I.e., the value returned by
> InterlockedIncrement is the incremented value, not some random value
> with the same sign as the value.
> 
> The only thing I'm not sure about is if there is a corner case that I
> missed.  Everything works fine "for me" but you never know...
> 
> The functions are below.
> 
> Are there any objections to my using these?  Robert?  The thread code
> would be the most affected, of course.

I'll do a little research and get back to you.

Rob