/*
 * Copyright (c) International Business Machines Corp., 2014
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/*
 *   File: watch.h
 * Author: Shaun Wetzstein <shaun@us.ibm.com>
 *  Descr: Directory activity callback monitor
 *   Note:
 *   Date: 10/03/10
 */

#ifndef __WATCH_H__
#define __WATCH_H__

#include <stdint.h>
#include <stdbool.h>

#include <sys/inotify.h>

#include "attribute.h"
#include "builtin.h"
#include "assert.h"

#include "array.h"

/* ==================================================================== */

#define WATCH_ACCESS		IN_ACCESS
#define WATCH_ATTRIB		IN_ATTRIB
#define WATCH_CLOSE_WRITE	IN_CLOSE_WRITE
#define WATCH_CLOSE_NOWRITE	IN_CLOSE_NOWRITE
#define WATCH_CREATE		IN_CREATE
#define WATCH_DELETE		IN_DELETE
#define WATCH_DELETE_SELF	IN_DELETE_SELF
#define WATCH_MODIFY		IN_MODIFY
#define WATCH_MOVE_SELF		IN_MOVE_SELF
#define WATCH_MOVE_FROM		IN_MOVE_FROM
#define WATCH_MOVE_TO		IN_MOVE_TO
#define WATCH_OPEN		IN_OPEN

typedef struct watch watch_t;
typedef struct watch_callback watch_callback_t;
typedef struct inotify_event watch_event_t;

typedef int (*watch_f) (watch_event_t *);

struct watch {
	int fd;
	array_t callbacks;
};

struct watch_callback {
	void *data;
	watch_f func;
};

/* ======================================================================= */

extern void watch_init(watch_t * self) __nonnull((1));
extern void watch_delete(watch_t * self) __nonnull((1));

extern int watch_fileno(watch_t * self) __nonnull((1));

extern uint32_t watch_add(watch_t * self, const char *path, uint32_t events,
			  watch_callback_t * cb) __nonnull((1, 2));
extern void watch_remove(watch_t * self, uint32_t wd) __nonnull((1));

extern void watch_wait(watch_t * self) __nonnull((1));

/* ======================================================================= */

#endif				/* __watch_H__ */