xref: /illumos-gate/usr/src/lib/libzfs/common/libzfs_taskq.h (revision 591e0e133f9980083db5d64ac33a30bcc3382ff7)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
25  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26  */
27 
28 #ifndef	_ZFS_TASKQ_H
29 #define	_ZFS_TASKQ_H
30 
31 #include <stdint.h>
32 #include <umem.h>
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 typedef struct zfs_taskq zfs_taskq_t;
39 typedef uintptr_t zfs_taskqid_t;
40 typedef void (ztask_func_t)(void *);
41 
42 #define	ZFS_TQENT_FLAG_PREALLOC		0x1	/* taskq_dispatch_ent used */
43 
44 #define	ZFS_TASKQ_PREPOPULATE		0x0001
45 
46 #define	ZFS_TQ_SLEEP	UMEM_NOFAIL	/* Can block for memory */
47 #define	ZFS_TQ_NOSLEEP	UMEM_DEFAULT	/* cannot block for memory; may fail */
48 #define	ZFS_TQ_FRONT	0x08		/* Queue in front */
49 
50 extern zfs_taskq_t	*zfs_taskq_create(const char *, int, pri_t, int,
51 	int, uint_t);
52 extern void		zfs_taskq_destroy(zfs_taskq_t *);
53 
54 extern zfs_taskqid_t	zfs_taskq_dispatch(zfs_taskq_t *, ztask_func_t,
55 	void *, uint_t);
56 
57 extern void		zfs_taskq_wait(zfs_taskq_t *);
58 
59 #ifdef	__cplusplus
60 }
61 #endif
62 
63 #endif	/* _ZFS_TASKQ_H */
64