#ifndef _KSUDOKU_H_
#define _KSUDOKU_H_

#include <linux/init.h>
#include <linux/module.h>
#include <linux/sysfs.h>
#include <asm/atomic.h>

struct ksudoku;

#define to_ksudoku(obj) container_of(obj, struct ksudoku, kobj)
#define to_ksudoku_attr(_attr) container_of(_attr, struct kobj_attribute, attr)

struct sudoku_attribute {
	struct attribute attr;
	ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
                        char *buf);
	ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
			 const char *buf, size_t count);
        bool value;
};

/*
 * The type of sudoku, "struct sudoku" is embedded in. A class
 * or bus can only contain one sudoku type.
 * This identifies the sudoku type and carries type-specific
 * information, equivalent to the kobj_type of a kobject.
 * Since we have only one type it always will be the same button
 * we're designing a subsystem so we have to make sysfs happy.
 * If "name" is specified, the uevent will contain it in
 * the DEVTYPE variable.
 */
/* struct sudoku_type { */
/* 	const char *name; */
/* 	const struct attribute_group **groups; */
/* 	int (*uevent)(struct sudoku *s, struct kobj_uevent_env *env); */
/* 	void (*release)(struct kobject *kobj); */
/*         const struct sysfs_ops *sysfs_ops; */
/* }; */

struct ksudoku {
        struct kobject *kobj;
        const struct attribute_group *attr_group;
        char matrix[81];
        atomic_t status;
} ;

#define SUDOKU_ATTR_RO(_name) \
	struct kobj_attribute sudoku_##_name = __ATTR_RO(_name)

#define SUDOKU_ATTR_WO(_name) \
	struct kobj_attribute sudoku_##_name = __ATTR_WO(_name)

#endif