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Re: [PATCH] Universally-unique gensyms

From: Mark H Weaver
Subject: Re: [PATCH] Universally-unique gensyms
Date: Wed, 18 Jan 2012 18:30:06 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux)

Andy Wingo <address@hidden> writes:

> Sorry for asking a stupid question, but why is it that we want the
> gensym counter to be thread-local?  Just to avoid the mutex?  TBH I
> don't think it's that big of a point of contention.  This risks
> devolution into bike-shed-landia tho...

It's a reasonable question.  I don't feel strongly about it, but I
prefer lock-free programming where practical, and in this case there's
really no need for coordination between threads.  Indeed, these UUIDs
are already designed to avoid collisions between multiple _sessions_
without coordination.  So why bother with the lock?


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