TrueFalseGuard    365 net/tools/epoll_server/epoll_server.cc   TrueFalseGuard recursion_guard(&in_wait_for_events_and_execute_callbacks_);
TrueFalseGuard    716 net/tools/epoll_server/epoll_server.cc         TrueFalseGuard in_use_guard(&(cb_and_mask->in_use));