Frederic Weisbecker | 3961376 | 2013-01-15 13:25:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Definitions for measuring cputime in nsecs resolution. |
| 3 | * |
| 4 | * Based on <arch/ia64/include/asm/cputime.h> |
| 5 | * |
| 6 | * Copyright (C) 2007 FUJITSU LIMITED |
| 7 | * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifndef _ASM_GENERIC_CPUTIME_NSECS_H |
| 17 | #define _ASM_GENERIC_CPUTIME_NSECS_H |
| 18 | |
| 19 | typedef u64 __nocast cputime_t; |
| 20 | typedef u64 __nocast cputime64_t; |
| 21 | |
| 22 | #define cputime_one_jiffy jiffies_to_cputime(1) |
| 23 | |
| 24 | /* |
| 25 | * Convert cputime <-> jiffies (HZ) |
| 26 | */ |
| 27 | #define cputime_to_jiffies(__ct) \ |
| 28 | ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) |
| 29 | #define jiffies_to_cputime(__jif) \ |
| 30 | (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ)) |
| 31 | #define cputime64_to_jiffies64(__ct) \ |
| 32 | ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) |
| 33 | #define jiffies64_to_cputime64(__jif) \ |
| 34 | (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ)) |
| 35 | |
| 36 | /* |
| 37 | * Convert cputime <-> microseconds |
| 38 | */ |
| 39 | #define cputime_to_usecs(__ct) \ |
| 40 | ((__force u64)(__ct) / NSEC_PER_USEC) |
| 41 | #define usecs_to_cputime(__usecs) \ |
| 42 | (__force cputime_t)((__usecs) * NSEC_PER_USEC) |
| 43 | #define usecs_to_cputime64(__usecs) \ |
| 44 | (__force cputime64_t)((__usecs) * NSEC_PER_USEC) |
| 45 | |
| 46 | /* |
| 47 | * Convert cputime <-> seconds |
| 48 | */ |
| 49 | #define cputime_to_secs(__ct) \ |
| 50 | ((__force u64)(__ct) / NSEC_PER_SEC) |
| 51 | #define secs_to_cputime(__secs) \ |
| 52 | (__force cputime_t)((__secs) * NSEC_PER_SEC) |
| 53 | |
| 54 | /* |
| 55 | * Convert cputime <-> timespec (nsec) |
| 56 | */ |
| 57 | static inline cputime_t timespec_to_cputime(const struct timespec *val) |
| 58 | { |
| 59 | u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec; |
| 60 | return (__force cputime_t) ret; |
| 61 | } |
| 62 | static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) |
| 63 | { |
| 64 | val->tv_sec = (__force u64) ct / NSEC_PER_SEC; |
| 65 | val->tv_nsec = (__force u64) ct % NSEC_PER_SEC; |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * Convert cputime <-> timeval (msec) |
| 70 | */ |
| 71 | static inline cputime_t timeval_to_cputime(struct timeval *val) |
| 72 | { |
| 73 | u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC; |
| 74 | return (__force cputime_t) ret; |
| 75 | } |
| 76 | static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) |
| 77 | { |
| 78 | val->tv_sec = (__force u64) ct / NSEC_PER_SEC; |
| 79 | val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Convert cputime <-> clock (USER_HZ) |
| 84 | */ |
| 85 | #define cputime_to_clock_t(__ct) \ |
| 86 | ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ)) |
| 87 | #define clock_t_to_cputime(__x) \ |
| 88 | (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ)) |
| 89 | |
| 90 | /* |
| 91 | * Convert cputime64 to clock. |
| 92 | */ |
| 93 | #define cputime64_to_clock_t(__ct) \ |
| 94 | cputime_to_clock_t((__force cputime_t)__ct) |
| 95 | |
| 96 | #endif |