/*
 * 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 (c) 1992 by Sun Microsystems, Inc.
 * Copyright 2021 Oxide Computer Company
 */

#ifndef _KSTAT_H
#define _KSTAT_H

#include <sys/types.h>
#include <sys/kstat.h>

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * kstat_open() returns a pointer to a kstat_ctl_t.
 * This is used for subsequent libkstat operations.
 */
typedef struct kstat_ctl {
        kid_t   kc_chain_id;    /* current kstat chain ID       */
        kstat_t *kc_chain;      /* pointer to kstat chain       */
        int     kc_kd;          /* /dev/kstat descriptor        */
} kstat_ctl_t;

extern  kstat_ctl_t     *kstat_open(void);
extern  int             kstat_close(kstat_ctl_t *);
extern  kid_t           kstat_read(kstat_ctl_t *, kstat_t *, void *);
extern  kid_t           kstat_write(kstat_ctl_t *, kstat_t *, void *);
extern  kid_t           kstat_chain_update(kstat_ctl_t *);
extern  kstat_t         *kstat_lookup(kstat_ctl_t *, const char *, int,
    const char *);
extern  void            *kstat_data_lookup(kstat_t *, const char *);

#ifdef  __cplusplus
}
#endif

#endif  /* _KSTAT_H */