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      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 2003 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  *
     26  */
     27 
     28 #ifndef	_QUEUE_H
     29 #define	_QUEUE_H
     30 
     31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     32 
     33 #ifdef __cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 #include <pthread.h>
     38 #include <stddef.h>
     39 
     40 typedef struct aln audit_link_t;
     41 struct aln {
     42 	audit_link_t	*aln_next;
     43 };
     44 
     45 /* one audit_rec_t per audit record */
     46 
     47 typedef struct abq audit_rec_t;
     48 struct abq {
     49 	audit_link_t	abq_l;
     50 	int		abq_ref_count;
     51 	size_t		abq_buf_len;	/* space allocated */
     52 	size_t		abq_data_len;	/* space used	   */
     53 	char		abq_buffer[1];	/* variable length */
     54 };
     55 #define	AUDIT_REC_HEADER  offsetof(audit_rec_t, abq_buffer[0])
     56 
     57 /* one audit_q_t entry per audit record per plugin */
     58 
     59 typedef struct aqq audit_q_t;		/* plugin queued data */
     60 struct aqq {
     61 	audit_link_t	aqq_l;
     62 	audit_rec_t	*aqq_data;
     63 	int		aqq_sequence;
     64 };
     65 
     66 /* queue head */
     67 
     68 typedef struct auq au_queue_t;
     69 
     70 struct auq {
     71 	void		*auq_head;
     72 	void		*auq_tail;
     73 	int		auq_count;
     74 	pthread_mutex_t	auq_lock;
     75 };
     76 
     77 int		audit_dequeue(au_queue_t *, void **);
     78 void		audit_queue_destroy(au_queue_t *);
     79 void		audit_enqueue(au_queue_t *, void *);
     80 int		audit_queue_size(au_queue_t *);
     81 void		audit_queue_init(au_queue_t *);
     82 audit_rec_t	*audit_release(pthread_mutex_t *, audit_rec_t *);
     83 void		audit_incr_ref(pthread_mutex_t *, audit_rec_t *);
     84 
     85 #ifdef __cplusplus
     86 }
     87 #endif
     88 
     89 #endif	/* _QUEUE_H */
     90