Rev 5270 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4065 | Serge | 1 | #ifndef _LINUX_TIME_H |
2 | #define _LINUX_TIME_H |
||
3 | |||
5270 | serge | 4 | # include |
5 | # include |
||
4065 | Serge | 6 | # include |
5270 | serge | 7 | # include |
4065 | Serge | 8 | |
9 | extern struct timezone sys_tz; |
||
10 | |||
11 | #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) |
||
12 | |||
13 | static inline int timespec_equal(const struct timespec *a, |
||
14 | const struct timespec *b) |
||
15 | { |
||
16 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); |
||
17 | } |
||
18 | |||
19 | /* |
||
20 | * lhs < rhs: return <0 |
||
21 | * lhs == rhs: return 0 |
||
22 | * lhs > rhs: return >0 |
||
23 | */ |
||
24 | static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) |
||
25 | { |
||
26 | if (lhs->tv_sec < rhs->tv_sec) |
||
27 | return -1; |
||
28 | if (lhs->tv_sec > rhs->tv_sec) |
||
29 | return 1; |
||
30 | return lhs->tv_nsec - rhs->tv_nsec; |
||
31 | } |
||
32 | |||
33 | static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs) |
||
34 | { |
||
35 | if (lhs->tv_sec < rhs->tv_sec) |
||
36 | return -1; |
||
37 | if (lhs->tv_sec > rhs->tv_sec) |
||
38 | return 1; |
||
39 | return lhs->tv_usec - rhs->tv_usec; |
||
40 | } |
||
41 | |||
5270 | serge | 42 | extern time64_t mktime64(const unsigned int year, const unsigned int mon, |
6082 | serge | 43 | const unsigned int day, const unsigned int hour, |
44 | const unsigned int min, const unsigned int sec); |
||
4065 | Serge | 45 | |
5270 | serge | 46 | /** |
47 | * Deprecated. Use mktime64(). |
||
48 | */ |
||
49 | static inline unsigned long mktime(const unsigned int year, |
||
50 | const unsigned int mon, const unsigned int day, |
||
51 | const unsigned int hour, const unsigned int min, |
||
52 | const unsigned int sec) |
||
53 | { |
||
54 | return mktime64(year, mon, day, hour, min, sec); |
||
55 | } |
||
56 | |||
4065 | Serge | 57 | extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec); |
58 | |||
59 | /* |
||
60 | * timespec_add_safe assumes both values are positive and checks |
||
61 | * for overflow. It will return TIME_T_MAX if the reutrn would be |
||
62 | * smaller then either of the arguments. |
||
63 | */ |
||
64 | extern struct timespec timespec_add_safe(const struct timespec lhs, |
||
65 | const struct timespec rhs); |
||
66 | |||
67 | |||
68 | static inline struct timespec timespec_add(struct timespec lhs, |
||
69 | struct timespec rhs) |
||
70 | { |
||
71 | struct timespec ts_delta; |
||
72 | set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec, |
||
73 | lhs.tv_nsec + rhs.tv_nsec); |
||
74 | return ts_delta; |
||
75 | } |
||
76 | |||
77 | /* |
||
78 | * sub = lhs - rhs, in normalized form |
||
79 | */ |
||
80 | static inline struct timespec timespec_sub(struct timespec lhs, |
||
81 | struct timespec rhs) |
||
82 | { |
||
83 | struct timespec ts_delta; |
||
84 | set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec, |
||
85 | lhs.tv_nsec - rhs.tv_nsec); |
||
86 | return ts_delta; |
||
87 | } |
||
88 | |||
89 | /* |
||
90 | * Returns true if the timespec is norm, false if denorm: |
||
91 | */ |
||
92 | static inline bool timespec_valid(const struct timespec *ts) |
||
93 | { |
||
94 | /* Dates before 1970 are bogus */ |
||
95 | if (ts->tv_sec < 0) |
||
96 | return false; |
||
97 | /* Can't have more nanoseconds then a second */ |
||
98 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) |
||
99 | return false; |
||
100 | return true; |
||
101 | } |
||
102 | |||
103 | static inline bool timespec_valid_strict(const struct timespec *ts) |
||
104 | { |
||
105 | if (!timespec_valid(ts)) |
||
106 | return false; |
||
107 | /* Disallow values that could overflow ktime_t */ |
||
108 | if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX) |
||
109 | return false; |
||
110 | return true; |
||
111 | } |
||
112 | |||
6082 | serge | 113 | static inline bool timeval_valid(const struct timeval *tv) |
114 | { |
||
115 | /* Dates before 1970 are bogus */ |
||
116 | if (tv->tv_sec < 0) |
||
117 | return false; |
||
118 | |||
119 | /* Can't have more microseconds then a second */ |
||
120 | if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC) |
||
121 | return false; |
||
122 | |||
123 | return true; |
||
124 | } |
||
125 | |||
5270 | serge | 126 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); |
4065 | Serge | 127 | |
128 | #define CURRENT_TIME (current_kernel_time()) |
||
129 | #define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 }) |
||
130 | |||
131 | /* Some architectures do not supply their own clocksource. |
||
132 | * This is mainly the case in architectures that get their |
||
133 | * inter-tick times by reading the counter on their interval |
||
134 | * timer. Since these timers wrap every tick, they're not really |
||
135 | * useful as clocksources. Wrapping them to act like one is possible |
||
136 | * but not very efficient. So we provide a callout these arches |
||
137 | * can implement for use with the jiffies clocksource to provide |
||
138 | * finer then tick granular time. |
||
139 | */ |
||
140 | #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET |
||
141 | extern u32 (*arch_gettimeoffset)(void); |
||
142 | #endif |
||
143 | |||
144 | struct itimerval; |
||
145 | extern int do_setitimer(int which, struct itimerval *value, |
||
146 | struct itimerval *ovalue); |
||
147 | extern int do_getitimer(int which, struct itimerval *value); |
||
148 | |||
5270 | serge | 149 | extern unsigned int alarm_setitimer(unsigned int seconds); |
4065 | Serge | 150 | |
5270 | serge | 151 | extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags); |
152 | |||
4065 | Serge | 153 | struct tms; |
154 | extern void do_sys_times(struct tms *); |
||
155 | |||
156 | /* |
||
157 | * Similar to the struct tm in userspace |
||
158 | * that the kernel source is self contained. |
||
159 | */ |
||
160 | struct tm { |
||
161 | /* |
||
162 | * the number of seconds after the minute, normally in the range |
||
163 | * 0 to 59, but can be up to 60 to allow for leap seconds |
||
164 | */ |
||
165 | int tm_sec; |
||
166 | /* the number of minutes after the hour, in the range 0 to 59*/ |
||
167 | int tm_min; |
||
168 | /* the number of hours past midnight, in the range 0 to 23 */ |
||
169 | int tm_hour; |
||
170 | /* the day of the month, in the range 1 to 31 */ |
||
171 | int tm_mday; |
||
172 | /* the number of months since January, in the range 0 to 11 */ |
||
173 | int tm_mon; |
||
174 | /* the number of years since 1900 */ |
||
175 | long tm_year; |
||
176 | /* the number of days since Sunday, in the range 0 to 6 */ |
||
177 | int tm_wday; |
||
178 | /* the number of days since January 1, in the range 0 to 365 */ |
||
179 | int tm_yday; |
||
180 | }; |
||
181 | |||
182 | void time_to_tm(time_t totalsecs, int offset, struct tm *result); |
||
183 | |||
184 | /** |
||
185 | * timespec_to_ns - Convert timespec to nanoseconds |
||
186 | * @ts: pointer to the timespec variable to be converted |
||
187 | * |
||
188 | * Returns the scalar nanosecond representation of the timespec |
||
189 | * parameter. |
||
190 | */ |
||
191 | static inline s64 timespec_to_ns(const struct timespec *ts) |
||
192 | { |
||
193 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; |
||
194 | } |
||
195 | |||
196 | /** |
||
197 | * timeval_to_ns - Convert timeval to nanoseconds |
||
198 | * @ts: pointer to the timeval variable to be converted |
||
199 | * |
||
200 | * Returns the scalar nanosecond representation of the timeval |
||
201 | * parameter. |
||
202 | */ |
||
203 | static inline s64 timeval_to_ns(const struct timeval *tv) |
||
204 | { |
||
205 | return ((s64) tv->tv_sec * NSEC_PER_SEC) + |
||
206 | tv->tv_usec * NSEC_PER_USEC; |
||
207 | } |
||
208 | |||
209 | /** |
||
210 | * ns_to_timespec - Convert nanoseconds to timespec |
||
211 | * @nsec: the nanoseconds value to be converted |
||
212 | * |
||
213 | * Returns the timespec representation of the nsec parameter. |
||
214 | */ |
||
215 | extern struct timespec ns_to_timespec(const s64 nsec); |
||
216 | |||
217 | /** |
||
218 | * ns_to_timeval - Convert nanoseconds to timeval |
||
219 | * @nsec: the nanoseconds value to be converted |
||
220 | * |
||
221 | * Returns the timeval representation of the nsec parameter. |
||
222 | */ |
||
223 | extern struct timeval ns_to_timeval(const s64 nsec); |
||
224 | |||
225 | /** |
||
226 | * timespec_add_ns - Adds nanoseconds to a timespec |
||
227 | * @a: pointer to timespec to be incremented |
||
228 | * @ns: unsigned nanoseconds value to be added |
||
229 | * |
||
230 | * This must always be inlined because its used from the x86-64 vdso, |
||
231 | * which cannot call other kernel functions. |
||
232 | */ |
||
233 | static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) |
||
234 | { |
||
235 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); |
||
236 | a->tv_nsec = ns; |
||
237 | } |
||
238 | |||
239 | #endif>>>>>0 |