alternate implementation of CondVar using std::condition_variable_any

gistfile1.txt

class CondVar {
public:
  // Note that it is not necessary to be holding an associated mutex to call signal).
  // See the discussion in
  //     http://en.cppreference.com/w/cpp/thread/condition_variable_any/notify_one
  // for more details.
  void notifyOne() { condvar_.notify_one(); }
  void notifyAll() { condvar_.notify_all(); };
  template <class LockGuard>
  void wait(LockGuard& guard) EXCLUSIVE_LOCKS_REQUIRED(guard) {
    condvar_.wait(guard);
  }
  template <class LockGuard, class Rep, class Period>
  void waitFor(LockGuard& guard, std::chrono::duration<Rep, Period> duration)
      EXCLUSIVE_LOCKS_REQUIRED(guard) {
    condvar_.wait_for(guard, duration);
  }

private:
  std::condition_variable_any condvar_;
};