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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
d956cfac | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
10 | * |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | ***************************************************************************** | |
24 | * Solaris Porting Layer (SPL) Time Implementation. | |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
ee476682 | 27 | #include <sys/sysmacros.h> |
28 | #include <sys/time.h> | |
ee476682 | 29 | |
3d061e9d | 30 | #ifdef HAVE_MONOTONIC_CLOCK |
31 | extern unsigned long long monotonic_clock(void); | |
32 | #endif | |
33 | ||
937879f1 | 34 | #ifdef DEBUG_SUBSYSTEM |
35 | #undef DEBUG_SUBSYSTEM | |
36 | #endif | |
37 | ||
38 | #define DEBUG_SUBSYSTEM S_TIME | |
39 | ||
ee476682 | 40 | void |
41 | __gethrestime(timestruc_t *ts) | |
42 | { | |
3d061e9d | 43 | struct timeval tv; |
79b31f36 | 44 | |
3d061e9d | 45 | do_gettimeofday(&tv); |
46 | ts->tv_sec = tv.tv_sec; | |
47 | ts->tv_nsec = tv.tv_usec * NSEC_PER_USEC; | |
79b31f36 | 48 | } |
3d061e9d | 49 | EXPORT_SYMBOL(__gethrestime); |
79b31f36 | 50 | |
3d061e9d | 51 | /* Use monotonic_clock() by default. It's faster and is available on older |
52 | * kernels, but few architectures have them, so we must fallback to | |
53 | * do_posix_clock_monotonic_gettime(). | |
79b31f36 | 54 | */ |
55 | hrtime_t | |
56 | __gethrtime(void) { | |
3d061e9d | 57 | #ifdef HAVE_MONOTONIC_CLOCK |
b07335c1 | 58 | unsigned long long res = monotonic_clock(); |
3d061e9d | 59 | |
b07335c1 | 60 | /* Deal with signed/unsigned mismatch */ |
61 | return (hrtime_t)(res & ~(1ULL << 63)); | |
3d061e9d | 62 | #else |
6020190e | 63 | struct timespec ts; |
79b31f36 | 64 | |
6020190e | 65 | do_posix_clock_monotonic_gettime(&ts); |
8a1c9a02 | 66 | return (((hrtime_t)ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec); |
3d061e9d | 67 | #endif |
79b31f36 | 68 | } |
69 | EXPORT_SYMBOL(__gethrtime); | |
ff449ac4 | 70 | |
6a6cafbe | 71 | /* set_normalized_timespec() API changes |
72 | * 2.6.0 - 2.6.15: Inline function provided by linux/time.h | |
3d061e9d | 73 | * 2.6.16 - 2.6.25: Function prototype defined but not exported |
6a6cafbe | 74 | * 2.6.26 - 2.6.x: Function defined and exported |
ff449ac4 | 75 | */ |
6a6cafbe | 76 | #if !defined(HAVE_SET_NORMALIZED_TIMESPEC_INLINE) && \ |
77 | !defined(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT) | |
ff449ac4 | 78 | void |
79 | set_normalized_timespec(struct timespec *ts, time_t sec, long nsec) | |
80 | { | |
81 | while (nsec >= NSEC_PER_SEC) { | |
82 | nsec -= NSEC_PER_SEC; | |
83 | ++sec; | |
84 | } | |
85 | while (nsec < 0) { | |
86 | nsec += NSEC_PER_SEC; | |
87 | --sec; | |
88 | } | |
89 | ts->tv_sec = sec; | |
90 | ts->tv_nsec = nsec; | |
91 | } | |
92 | EXPORT_SYMBOL(set_normalized_timespec); | |
6a6cafbe | 93 | #endif |