Re: [boost] shared_mutex deadlocks?

From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-04-23 09:15:34

Anthony Williams:
> shared_mutex algorithms are *hard* to get right.

I'm now tending towards the opinion that rwlocks are hard to use correctly 
(and test). For the 2R+1W case I've been testing, it occurs to me that the 
writer wait time is normal - statistically, the time for the two readers to 
finish their timeslices of 1ms is expected to be 0.75ms.

A (possibly?) better test would not have a dedicated writer thread, but 
would use a pool of generic worker threads that alternate between reading 
and writing with a certain probability. I may try one at some point.