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