Re: [boost] Ann: guid library

From: Giovanni Piero Deretta (gpderetta_at_[hidden])
Date: 2006-11-14 04:54:22

On 11/14/06, Lassi A. Tuura <lassi.tuura_at_[hidden]> wrote:
> In case it helps the discussion, over the last year or so we've had
> several reports of conflicting GUIDs generated independently in our
> applications.
>
> As far as I know all cases involved multiprocessor systems generating
> GUIDs with MAC address.  We never managed to trap this live but our
> analysis indicates exactly the same piece of code executed exactly
> the same millisecond on several processors and at least two managed
> to generate the same 12 bits of randomness there are in GUIDs with
> MAC address.[*]
>

Wouldn't adding the process (or thread) ID to the mix help in this case?

gpd