On Thu, 9 Jun 2005 12:56:55 -0400 Jody Hagins <jody-boost-011304@atdesk.com> wrote: Oops. I forgot to add this... Notice one obvious issue: notify_one() and notify_all() still go through the native CV code to ping potential waiting threads. However, without significant change to the current implementation of condition, I do not see an easy way to prevent this. Initially, I added condition_t<>, and specialized condition_t<void> to be identical to the current implementation of condition, condition_t<null_mutex> has no-ops for notify_*(), and the default implementation of condition_t<typename Lock> is identical to condition_t<void>, except the member functions are not templatized on the lock type (since the class is already templatized that way). Then, we also have... typedef condition_t<void> condition; which should leave all existing use of condition, working the same. However, this is a lot of change, for an optimization (calling notify_*() should not break anything), and I wanted to present as small of a change as possible. If this is accepted, then it may be worth adding the optimization, and then writing tests to make sure it does not break anything that uses condition in its current state...