- barrier-wait BAR #!optional TIMOUTprocedure
Synchronize calling thread at the barrier BAR. The calling thread wi;; block until the barrier-limit number of threads have called barrier-wait on barrier BAR.
Returns #t, and #f otherwise, to the invoking thread when the barrier is "lifted".
- barrier : barrier to wait "behind."
- (or false real time) : timeout to abandon wait.