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On Tue, Mar 09, 2010 at 12:36:08PM +0100, Corinna Vinschen wrote: >On Mar 9 11:08, Schmidt, Oliver wrote: >> Hi Christopher, >> >> Fist of all thanks for your immediate feedback :-) >> >> >> /* Initialize installation root dir. */ >> >> if (!installation_root[0]) >> >> init_installation_root (); >> >> > I'll check in something tonight which attempts to solve this problem. >> >> Thanks in advance. >> >> > It's a somewhat tricky problem because adding a mutex here would slow >> > down every invocation of a cygwin program and we don't want to add to >> > the "Why is Cygwin so slow???" scenarios if we can help it. >> >> I understand your concern for sure ;-) >> >> Maybe that's the very thing you're thinking about but ... AFAIK a >> spinlock is the usual paradigm in scenarios where one doesn't >> anticipate contention but needs to be aware of it 'just in case'. 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 really do have a patch sitting in my sandbox. I just forgot to test it last night. cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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