/*
 * 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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _FMD_DISPQ_H
#define _FMD_DISPQ_H

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

#ifdef  __cplusplus
extern "C" {
#endif

#include <fmd_idspace.h>
#include <fmd_eventq.h>

typedef struct fmd_dispqlist {
        struct fmd_dispqlist *dq_next;  /* link to next subscription object */
        fmd_eventq_t *dq_eventq;        /* pointer to subscribing eventq */
} fmd_dispqlist_t;

typedef struct fmd_dispqelem {
        char *dq_name;                  /* name associated with this element */
        struct fmd_dispqelem *dq_link;  /* link to next element in hash chain */
        struct fmd_dispqelem **dq_hash; /* hash bucket array for lower levels */
        uint_t dq_hashlen;              /* length of dq_hash bucket array */
        fmd_dispqlist_t *dq_list;       /* head of list of subscribers */
        uint_t dq_refs;                 /* ref count of hash and list elems */
} fmd_dispqelem_t;

typedef struct fmd_dispq {
        pthread_rwlock_t dq_lock;       /* lock for event dispatch queue */
        fmd_dispqelem_t *dq_root;       /* root hash table pointer */
        fmd_idspace_t *dq_gids;         /* id hash for subscriber group ids */
        id_t dq_gmax;                   /* maximum group id allocated */
} fmd_dispq_t;

extern fmd_dispq_t *fmd_dispq_create(void);
extern void fmd_dispq_destroy(fmd_dispq_t *);

extern void fmd_dispq_insert(fmd_dispq_t *, fmd_eventq_t *, const char *);
extern void fmd_dispq_delete(fmd_dispq_t *, fmd_eventq_t *, const char *);
extern void fmd_dispq_dispatch(fmd_dispq_t *, fmd_event_t *, const char *);
extern void fmd_dispq_dispatch_gid(fmd_dispq_t *, fmd_event_t *,
    const char *, id_t);

extern id_t fmd_dispq_getgid(fmd_dispq_t *, void *);
extern void fmd_dispq_delgid(fmd_dispq_t *, id_t);

#ifdef  __cplusplus
}
#endif

#endif  /* _FMD_DISPQ_H */