Re: [boost] [thread] RFC standard proposed mutex, read-write mutex, condition

From: Austin Bingham (abingham_at_[hidden])
Date: 2007-08-22 14:24:52

Overall I really like the work you've done here.

I have a question about the scheduling of shared v. exclusive locks on 
shared_mutex. Suppose I have several shared locks already established 
and then an exclusive lock is tried. Are subsequent shared lock attempts 
deferred until after theexclusive lock has released? Or is the exclusive 
lock deferred until after all shared locks (regardless of when they were 
made) are released? Or is this even defined?

It may be easiest to just leave the scheduling undefined, and perhaps 
that is the intent of the proposal.  Whether it's defined or not, though, 
it should be documented.

It might be useful, however, if the scheduling policy were configurable. 
It seems that such a policy could be established on the shared_mutex 
itself.  

Again, this is really excellent and I'm genuinely excited to see 
this progress. Thanks for all the hard work!

--
Austin Bingham
Signal & Information Sciences Laboratory
Applied Research Laboratories, University of Texas at Austin
10000 Burnet Rd., Austin, TX 78758
email:  abingham_at_[hidden]
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