/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _FMD_BUF_H
#define _FMD_BUF_H

#include <sys/types.h>

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct fmd_buf {
        char *buf_name;                 /* name of this buffer */
        struct fmd_buf *buf_next;       /* next buffer in hash chain */
        void *buf_data;                 /* buffer data storage */
        size_t buf_size;                /* buffer size */
        uint_t buf_flags;               /* buffer flags (see below) */
} fmd_buf_t;

#define FMD_BUF_DIRTY   0x1             /* buffer is dirty (needs checkpoint) */

typedef void fmd_buf_f(fmd_buf_t *, void *);

typedef struct fmd_buf_hash {
        fmd_buf_t **bh_hash;            /* hash bucket array for buffers */
        uint_t bh_hashlen;              /* length of hash bucket array */
        uint_t bh_count;                /* number of buffers in hash */
} fmd_buf_hash_t;

extern void fmd_buf_hash_create(fmd_buf_hash_t *);
extern size_t fmd_buf_hash_destroy(fmd_buf_hash_t *);
extern void fmd_buf_hash_apply(fmd_buf_hash_t *, fmd_buf_f *, void *);
extern void fmd_buf_hash_commit(fmd_buf_hash_t *);
extern uint_t fmd_buf_hash_count(fmd_buf_hash_t *);

extern fmd_buf_t *fmd_buf_insert(fmd_buf_hash_t *, const char *, size_t);
extern fmd_buf_t *fmd_buf_lookup(fmd_buf_hash_t *, const char *);
extern void fmd_buf_delete(fmd_buf_hash_t *, const char *);

#ifdef  __cplusplus
}
#endif

#endif  /* _FMD_BUF_H */