/*
 * kernel/power/tuxonice_extent.h
 *
 * Copyright (C) 2003-2014 Nigel Cunningham (nigel at tuxonice net)
 *
 * This file is released under the GPLv2.
 *
 * It contains declarations related to extents. Extents are
 * TuxOnIce's method of storing some of the metadata for the image.
 * See tuxonice_extent.c for more info.
 *
 */

#include "tuxonice_modules.h"

#ifndef EXTENT_H
#define EXTENT_H

struct hibernate_extent {
	unsigned long start, end;
	struct hibernate_extent *next;
};

struct hibernate_extent_chain {
	unsigned long size; /* size of the chain ie sum (max-min+1) */
	int num_extents;
	struct hibernate_extent *first, *last_touched;
	struct hibernate_extent *current_extent;
	unsigned long current_offset;
};

/* Simplify iterating through all the values in an extent chain */
#define toi_extent_for_each(extent_chain, extentpointer, value) \
	for ((extentpointer) = ((extent_chain)->first), (value) = ((extentpointer)->start); \
	     (extentpointer) && (((extentpointer)->next) || ((value) <= ((extentpointer)->end))); \
	     ((value) == ((extentpointer)->end) ? \
		((extentpointer) = ((extentpointer)->next), (value) = \
		 ((extentpointer) ? ((extentpointer)->start) : 0)) : ((value)++)))
#endif