The function condition-variable-broadcast wakes all threads currently waiting on the condition variable condvar. In most uses of condition variables, the caller should be holding the lock that the waiter used when calling condition-variable-wait for this condition variable, but this is not required. When using the lock, you may prefer to use lock-and-condition-variable-broadcast.
The return value signaledp is non-nil if some processes were signaled, or nil if there were no processes waiting.
condition-variable-wait
make-condition-variable
lock-and-condition-variable-broadcast
lock-and-condition-variable-wait
simple-lock-and-condition-variable-wait
lock-and-condition-variable-signal
condition-variable-signal
LispWorks User Guide and Reference Manual - 13 Feb 2015