Releases the exlusive lock. If the exlusive lock has no more matching Close(millis) the exlusive lock is released. And Threas waiting to Enter(millis) or Close(millis) will continue executing. If the thread currently is also holding the non-exlusive lock, the Thread will imediatly Enter the lock. The thread will have to match all calls to Enter(millis) with the corresponding count of Exit().

void Open()