[elephant-devel] More work on BDB interrupt-proofing

[Ian Eslick]

When without-interrupts was put in Allegro (7.x) didn't have SMP support and it was a fast way of handling locking for high frequency synchronization (primarily the serializer).  I haven't used Allegro in awhile so didn't revisit this.  I guess that 9.0 is finally going to support SMP!  Feel free to drop a patch for this!

Ian

On Nov 22, 2009, at 10:28 AM, Leslie P. Polzer wrote:

> 
> Red Daly wrote:
> 
>> Why do these sections require WITHOUT-INTERRUPTS instead of locking?
>> WITHOUT-INTERRUPTS is deprecated in Allegro, and in lisps running on
>> multiple cores, it seems to have no atomicity guarantees that are
>> immediately relevant to me.
>> 
>> Quoted below is the Allegro documentation.  I'm not sure if
>> WITHOUT-INTERRUPTS has the same semantics in other lisps:
> 
> I don't know about Allegro but on SBCL for example locks and
> without-interrupts are orthogonal. The latter is all about
> asynchronous POSIX signals.
> 
>  Leslie
> 
> -- 
> http://www.linkedin.com/in/polzer
> 
> 
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