int poll_add(poll_t **p, int fd, short evt);
int poll_rm(poll_t **p, int fd);
int poll_update(poll_t *p, int fd, short evt);

int poll_wait(poll_t *p, int timeout);

int poll_canread(poll_t *p, int fd);
int poll_canwrite(poll_t *p, int fd);
int poll_isclose(poll_t *p, int fd);

typedef struct ui_s {
	void (*init)(struct ui_s *);
	void (*free)(struct ui_s *);
	void (*update)(struct ui_s *);
	bool (*getEvent)(struct ui_s *);
	void (*processEvent)(struct ui_s *);
	void (*initWindows)(struct ui_s *);
	void (*freeWindows)(struct ui_s *);
	bool (*getServerEvent)(struct ui_s *);
	void (*processServerEvent)(struct ui_s *);
	void (*sendServerEvent)(struct ui_s *);
	void (*fileEvent)(struct ui_s *);

	win_t *w_chat;
	win_t *w_chan;
	win_t *w_info;
	win_t *w_logs;

	size_t framecap;
	bool hasToQuit;
	sess_t *session;

	char *buffer;
	char buffer_last;
	size_t buffer_idx;
	size_t buffer_size;
} ui_t;