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      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