What happens if i call wait on a notified condition variable

Question

Suppose I have two threads and one shared c++ 11 condition variable. What whould happen if thread1 call notify and after that thread2 call wait? Will thread2 block forever o

Answer 1

Thread2 will block until someone calls notify. Calls to notify release threads that are waiting at the time of the call. If there are no threads waiting, they do nothing. They aren't saved.