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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _GROUP_H
#define _GROUP_H
/*
* Group Abstraction
*/
#ifdef __cplusplus
extern "C" {
#endif
#if (defined(_KERNEL) || defined(_KMEMUSER))
#include <sys/types.h>
#define GRP_RESIZE 0x1 /* Resize group capacity if needed */
#define GRP_NORESIZE 0x2 /* Do not resize group capacity; may fail */
/*
* group structure
*/
typedef struct group {
uint_t grp_size; /* # of elements */
uint_t grp_capacity; /* current group capacity */
void **grp_set; /* element vector */
} group_t;
typedef uint_t group_iter_t;
/*
* Return the number of elements in the group
*/
#define GROUP_SIZE(grp) ((grp)->grp_size)
/*
* Access the element at the specified group index
*/
#define GROUP_ACCESS(grp, index) ((grp)->grp_set[index])
/*
* Group creation / destruction
*/
void group_create(group_t *);
void group_destroy(group_t *);
/*
* Expand a group's holding capacity
*/
void group_expand(group_t *, uint_t);
/*
* Group element iteration
*/
void group_iter_init(group_iter_t *);
void *group_iterate(group_t *, group_iter_t *);
/*
* Add / remove an element (or elements) from the group
*/
int group_add(group_t *, void *, int);
int group_remove(group_t *, void *, int);
void group_empty(group_t *);
/*
* Add / remove / access an element at a specified index.
* The group must already have sufficient capacity to hold
* an element at the specified index.
*/
int group_add_at(group_t *, void *, uint_t);
void group_remove_at(group_t *, uint_t);
/*
* Search for an element in a group.
* Returns an index that may be used with the *_at()
* routines above to add or remove the element.
*/
uint_t group_find(group_t *, void *);
/*
* Convert a group to a string with list of integers.
*
* The consecutive integer values are represented using x-y notation.
* The resulting string looks like "1,2-5,8"
*
* The convert argument is used to map group elements to integer IDs.
* The output buffer and its length are specfied in the arguments.
*/
extern char *group2intlist(group_t *, char *, size_t, int (convert)(void*));
#endif /* !_KERNEL && !_KMEMUSER */
#ifdef __cplusplus
}
#endif
#endif /* _GROUP_H */
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