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 https://opensource.org/licenses/CDDL-1.0.
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#ifndef	_SYS_FS_ZFS_DELAY_H
23#define	_SYS_FS_ZFS_DELAY_H
24
25#include <sys/timer.h>
26
27/*
28 * Generic wrapper to sleep until a given time.
29 */
30#define	zfs_sleep_until(wakeup)						\
31	do {								\
32		hrtime_t delta = wakeup - gethrtime();			\
33									\
34		if (delta > 0) {					\
35			unsigned long delta_us;				\
36			delta_us = delta / (NANOSEC / MICROSEC);	\
37			usleep_range(delta_us, delta_us + 100);		\
38		}							\
39	} while (0)
40
41#endif	/* _SYS_FS_ZFS_DELAY_H */
42