Monitor for alternating readers-writers with dual mutex

[Yuri Gadow]

Wondering if anyone has implemented a reader/writer monitor with separate mutexs for reading and writing (to restrict notifies to the appropriate group and allow writers to be woken singly.)?
I'm having trouble getting around the fact that a wait only releases the lock on the wait target. Any thoughts?

[Jim Baiter]

I think Doug Lea's concurrent package has something like this, link is
http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html

[David Weitzman]

In case anyone is curious, mutex is a cool word.