diff options
Diffstat (limited to 'include/sys/zfs_delay.h')
| -rw-r--r-- | include/sys/zfs_delay.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/sys/zfs_delay.h b/include/sys/zfs_delay.h new file mode 100644 index 000000000000..40e617dba961 --- /dev/null +++ b/include/sys/zfs_delay.h @@ -0,0 +1,41 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +#ifndef _SYS_FS_ZFS_DELAY_H +#define _SYS_FS_ZFS_DELAY_H + +#include <sys/timer.h> + +/* + * Generic wrapper to sleep until a given time. + */ +#define zfs_sleep_until(wakeup) \ + do { \ + hrtime_t delta = wakeup - gethrtime(); \ + \ + if (delta > 0) { \ + unsigned long delta_us; \ + delta_us = delta / (NANOSEC / MICROSEC); \ + usleep_range(delta_us, delta_us + 100); \ + } \ + } while (0) + +#endif /* _SYS_FS_ZFS_DELAY_H */ |