#pragma once #include class GNotifier { public: enum Event { None = 0, Read = 1, Write = 2, Exceptional = 4, }; GNotifier(int fd, unsigned event_mask); ~GNotifier(); Function on_ready_to_read; Function on_ready_to_write; int fd() const { return m_fd; } unsigned event_mask() const { return m_event_mask; } private: int m_fd { -1 }; unsigned m_event_mask { 0 }; };