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Re: Cygwin 1.7: Concurrency Issue with Shared State Initialization
On Mar 10 10:55, Schmidt, Oliver wrote:
> Hi Corrina,
>
> Thanks for your involvement :-)
>
> >> [...] a spinlock [...] With
> >> InterlockedCompareExchange() and Sleep() it should be quite simple to
> >> create one that's very efficient in the usual scenario.
>
> > Does the below patch fix this for you?
>
> I'll test the snapshot asap!
>
> [...]
> + LONG init = InterlockedCompareExchange (&installation_root_init, 1L, 0L);
> [...]
> + low_priority_sleep (0);
> [...]
>
> I see we were thinking along the same lines ;-)
The final patch is from cgf. It's probably more performant since it
drops the requirement for an additional spinlock.
Corinna
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Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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