fmd_ustat.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _FMD_USTAT_H
#define _FMD_USTAT_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <pthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <fmd_api.h>
#include <fmd_list.h>
typedef struct fmd_ustat_snap {
fmd_stat_t *uss_buf; /* array of statistic data */
uint_t uss_len; /* length of uss_buf array */
} fmd_ustat_snap_t;
typedef struct fmd_ustat_chunk {
fmd_list_t usc_list; /* linked list next/prev pointers */
fmd_stat_t *usc_base; /* base of chunk allocation */
uint_t usc_len; /* number of stat structs in chunk */
uint_t usc_refs; /* reference count on chunk */
} fmd_ustat_chunk_t;
typedef struct fmd_ustat_elem {
struct fmd_ustat_elem *use_next; /* pointer to next statistic in hash */
const fmd_stat_t *use_stat; /* pointer to statistic data storage */
fmd_ustat_chunk_t *use_chunk; /* pointer to alloc chunk (or NULL) */
} fmd_ustat_elem_t;
typedef struct fmd_ustat {
pthread_rwlock_t us_lock; /* lock protecting ustat collection */
fmd_list_t us_chunks; /* linked list of allocation chunks */
fmd_ustat_elem_t **us_hash; /* hash bucket array of stat elements */
uint_t us_hashlen; /* length of us_hash bucket array */
uint_t us_nelems; /* number of elements in collection */
} fmd_ustat_t;
extern fmd_ustat_t *fmd_ustat_create(void);
extern void fmd_ustat_destroy(fmd_ustat_t *);
extern int fmd_ustat_snapshot(fmd_ustat_t *, fmd_ustat_snap_t *);
#define FMD_USTAT_NOALLOC 0x0 /* fmd should use caller's memory */
#define FMD_USTAT_ALLOC 0x1 /* fmd should allocate stats memory */
#define FMD_USTAT_VALIDATE 0x2 /* fmd should validate stat names */
#if FMD_STAT_NOALLOC != FMD_USTAT_NOALLOC
#error "FMD_STAT_NOALLOC must match FMD_USTAT_NOALLOC"
#endif
#if FMD_STAT_ALLOC != FMD_USTAT_ALLOC
#error "FMD_STAT_ALLOC must match FMD_USTAT_ALLOC"
#endif
extern fmd_stat_t *fmd_ustat_insert(fmd_ustat_t *,
uint_t, uint_t, fmd_stat_t *, fmd_stat_t **);
extern void fmd_ustat_delete(fmd_ustat_t *, uint_t, fmd_stat_t *);
#ifdef __cplusplus
}
#endif
#endif /* _FMD_USTAT_H */