From: "Johannes Sixt" <j...@kdbg.org>
One point is that the DCLP idiom must be implemented correctly. There are
solutions, of course, and when the initialization is over, we have a
miniscule overhead at each pthread_mutex_lock call.
I had to look up DCLP ( = Double Checked Locking Patterns), and found a good
write up on the issues..
http://www.aristeia.com/Papers/DDJ_Jul_Aug_2004_revised.pdf "C++ and the
Perils of Double-Checked Locking", which include 'C' issues, and
multi-thread, multi-processor issues. Not an easy issue when fighting
optimisers..
--
Philip
