usr/src/lib/libkstat/kstat.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1992 by Sun Microsystems, Inc.
  24  * Copyright 2021 Oxide Computer Company
  25  */
  26
  27 #ifndef _KSTAT_H
  28 #define _KSTAT_H
  29
  30 #include <sys/types.h>
  31 #include <sys/kstat.h>
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 /*
  38  * kstat_open() returns a pointer to a kstat_ctl_t.
  39  * This is used for subsequent libkstat operations.
  40  */
  41 typedef struct kstat_ctl {
  42         kid_t   kc_chain_id;    /* current kstat chain ID       */
  43         kstat_t *kc_chain;      /* pointer to kstat chain       */
  44         int     kc_kd;          /* /dev/kstat descriptor        */
  45 } kstat_ctl_t;
  46
  47 extern  kstat_ctl_t     *kstat_open(void);
  48 extern  int             kstat_close(kstat_ctl_t *);
  49 extern  kid_t           kstat_read(kstat_ctl_t *, kstat_t *, void *);
  50 extern  kid_t           kstat_write(kstat_ctl_t *, kstat_t *, void *);
  51 extern  kid_t           kstat_chain_update(kstat_ctl_t *);
  52 extern  kstat_t         *kstat_lookup(kstat_ctl_t *, const char *, int,
  53     const char *);
  54 extern  void            *kstat_data_lookup(kstat_t *, const char *);
  55
  56 #ifdef  __cplusplus
  57 }
  58 #endif
  59
  60 #endif  /* _KSTAT_H */