1 /*
2  * CDDL HEADER START
3  *
4  * This file and its contents are supplied under the terms of the
5  * Common Development and Distribution License ("CDDL"), version 1.0.
6  * You may only use this file in accordance with the terms of version
7  * 1.0 of the CDDL.
8  *
9  * A full copy of the text of the CDDL should have accompanied this
10  * source.  A copy of the CDDL is also available via the Internet at
11  * http://www.illumos.org/license/CDDL.
12  *
13  * CDDL HEADER END
14  */
15 /*
16  * Copyright (c) 2014 by Delphix. All rights reserved.
17  */
18 
19 #ifndef   _BQUEUE_H
20 #define   _BQUEUE_H
21 
22 #ifdef    __cplusplus
23 extern "C" {
24 #endif
25 
26 #include  <sys/zfs_context.h>
27 
28 typedef struct bqueue {
29           list_t bq_list;
30           kmutex_t bq_lock;
31           kcondvar_t bq_add_cv;
32           kcondvar_t bq_pop_cv;
33           uint64_t bq_size;
34           uint64_t bq_maxsize;
35           size_t bq_node_offset;
36 } bqueue_t;
37 
38 typedef struct bqueue_node {
39           list_node_t bqn_node;
40           uint64_t bqn_size;
41 } bqueue_node_t;
42 
43 
44 int bqueue_init(bqueue_t *, uint64_t, size_t);
45 void bqueue_destroy(bqueue_t *);
46 void bqueue_enqueue(bqueue_t *, void *, uint64_t);
47 void *bqueue_dequeue(bqueue_t *);
48 boolean_t bqueue_empty(bqueue_t *);
49 
50 #ifdef    __cplusplus
51 }
52 #endif
53 
54 #endif    /* _BQUEUE_H */
55