samba-mirror/ctdb/lib/events/events_internal.h

/* 
   Unix SMB/CIFS implementation.

   generalised event loop handling

   Internal structs

   Copyright (C) Stefan Metzmacher 2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

struct event_ops {
	/* conntext init */
	int (*context_init)(struct event_context *ev, void *private_data);

	/* fd_event functions */
	struct fd_event *(*add_fd)(struct event_context *ev,
				   TALLOC_CTX *mem_ctx,
				   int fd, uint16_t flags,
				   event_fd_handler_t handler,
				   void *private_data);
	uint16_t (*get_fd_flags)(struct fd_event *fde);
	void (*set_fd_flags)(struct fd_event *fde, uint16_t flags);

	/* timed_event functions */
	struct timed_event *(*add_timed)(struct event_context *ev,
					 TALLOC_CTX *mem_ctx,
					 struct timeval next_event,
					 event_timed_handler_t handler,
					 void *private_data);

	/* loop functions */
	int (*loop_once)(struct event_context *ev);
	int (*loop_wait)(struct event_context *ev);
};

struct fd_event {
	struct fd_event *prev, *next;
	struct event_context *event_ctx;
	int fd;
	uint16_t flags; /* see EVENT_FD_* flags */
	event_fd_handler_t handler;
	/* this is private for the specific handler */
	void *private_data;
	/* this is private for the events_ops implementation */
	uint16_t additional_flags;
	void *additional_data;
};

struct timed_event {
	struct timed_event *prev, *next;
	struct event_context *event_ctx;
	struct timeval next_event;
	event_timed_handler_t handler;
	/* this is private for the specific handler */
	void *private_data;
	/* this is private for the events_ops implementation */
	void *additional_data;
};

struct event_context {	
	/* the specific events implementation */
	const struct event_ops *ops;
	/* this is private for the events_ops implementation */
	void *additional_data;
};

const struct event_ops *event_standard_get_ops(void);