[Ecls-list] MP stability improvement

Juan Jose Garcia-Ripoll juanjose.garciaripoll at googlemail.com
Sat Feb 11 22:47:06 UTC 2012

On Sat, Feb 11, 2012 at 10:14 PM, Juan Jose Garcia-Ripoll <
juanjose.garciaripoll at googlemail.com> wrote:

> I believe this would still work in the Windows implementation, where locks
> are always recursive, but it strongly relies on having libatomics compiled
> in for CAS support.

Sorry, I mixed up the code of the two functions a bit. I notice that there
is still a problem when the code gets interrupted before the owner is set
and the user does not unwind. This would happen, for instance, when the
thread is suspended by the garbage collector.

I have been toying for the last hour with alternatives, but while there are
some that profit from POSIX's error detection by forcing all locks to be
non-recursive, those do not work at all in Windows.

Definitely this all is rather messy :) I wonder whether it would make sense
to use CAS + wait times as SBCL does.


Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain)
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