Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _LINUX_TIME64_H |
| 2 | #define _LINUX_TIME64_H |
||
| 3 | |||
| 4 | #include |
||
| 5 | |||
| 6 | typedef __s64 time64_t; |
||
| 7 | |||
| 8 | /* |
||
| 9 | * This wants to go into uapi/linux/time.h once we agreed about the |
||
| 10 | * userspace interfaces. |
||
| 11 | */ |
||
| 12 | #if __BITS_PER_LONG == 64 |
||
| 13 | # define timespec64 timespec |
||
| 14 | #else |
||
| 15 | struct timespec64 { |
||
| 16 | time64_t tv_sec; /* seconds */ |
||
| 17 | long tv_nsec; /* nanoseconds */ |
||
| 18 | }; |
||
| 19 | #endif |
||
| 20 | |||
| 21 | /* Parameters used to convert the timespec values: */ |
||
| 22 | #define MSEC_PER_SEC 1000L |
||
| 23 | #define USEC_PER_MSEC 1000L |
||
| 24 | #define NSEC_PER_USEC 1000L |
||
| 25 | #define NSEC_PER_MSEC 1000000L |
||
| 26 | #define USEC_PER_SEC 1000000L |
||
| 27 | #define NSEC_PER_SEC 1000000000L |
||
| 28 | #define FSEC_PER_SEC 1000000000000000LL |
||
| 29 | |||
| 30 | /* Located here for timespec[64]_valid_strict */ |
||
| 31 | #define KTIME_MAX ((s64)~((u64)1 << 63)) |
||
| 32 | #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC) |
||
| 33 | |||
| 34 | #if __BITS_PER_LONG == 64 |
||
| 35 | |||
| 36 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) |
||
| 37 | { |
||
| 38 | return ts64; |
||
| 39 | } |
||
| 40 | |||
| 41 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) |
||
| 42 | { |
||
| 43 | return ts; |
||
| 44 | } |
||
| 45 | |||
| 46 | # define timespec64_equal timespec_equal |
||
| 47 | # define timespec64_compare timespec_compare |
||
| 48 | # define set_normalized_timespec64 set_normalized_timespec |
||
| 49 | # define timespec64_add_safe timespec_add_safe |
||
| 50 | # define timespec64_add timespec_add |
||
| 51 | # define timespec64_sub timespec_sub |
||
| 52 | # define timespec64_valid timespec_valid |
||
| 53 | # define timespec64_valid_strict timespec_valid_strict |
||
| 54 | # define timespec64_to_ns timespec_to_ns |
||
| 55 | # define ns_to_timespec64 ns_to_timespec |
||
| 56 | # define timespec64_add_ns timespec_add_ns |
||
| 57 | |||
| 58 | #else |
||
| 59 | |||
| 60 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) |
||
| 61 | { |
||
| 62 | struct timespec ret; |
||
| 63 | |||
| 64 | ret.tv_sec = (time_t)ts64.tv_sec; |
||
| 65 | ret.tv_nsec = ts64.tv_nsec; |
||
| 66 | return ret; |
||
| 67 | } |
||
| 68 | |||
| 69 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) |
||
| 70 | { |
||
| 71 | struct timespec64 ret; |
||
| 72 | |||
| 73 | ret.tv_sec = ts.tv_sec; |
||
| 74 | ret.tv_nsec = ts.tv_nsec; |
||
| 75 | return ret; |
||
| 76 | } |
||
| 77 | |||
| 78 | static inline int timespec64_equal(const struct timespec64 *a, |
||
| 79 | const struct timespec64 *b) |
||
| 80 | { |
||
| 81 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); |
||
| 82 | } |
||
| 83 | |||
| 84 | /* |
||
| 85 | * lhs < rhs: return <0 |
||
| 86 | * lhs == rhs: return 0 |
||
| 87 | * lhs > rhs: return >0 |
||
| 88 | */ |
||
| 89 | static inline int timespec64_compare(const struct timespec64 *lhs, const struct timespec64 *rhs) |
||
| 90 | { |
||
| 91 | if (lhs->tv_sec < rhs->tv_sec) |
||
| 92 | return -1; |
||
| 93 | if (lhs->tv_sec > rhs->tv_sec) |
||
| 94 | return 1; |
||
| 95 | return lhs->tv_nsec - rhs->tv_nsec; |
||
| 96 | } |
||
| 97 | |||
| 98 | extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec); |
||
| 99 | |||
| 100 | /* |
||
| 101 | * timespec64_add_safe assumes both values are positive and checks for |
||
| 102 | * overflow. It will return TIME_T_MAX if the returned value would be |
||
| 103 | * smaller then either of the arguments. |
||
| 104 | */ |
||
| 105 | extern struct timespec64 timespec64_add_safe(const struct timespec64 lhs, |
||
| 106 | const struct timespec64 rhs); |
||
| 107 | |||
| 108 | |||
| 109 | static inline struct timespec64 timespec64_add(struct timespec64 lhs, |
||
| 110 | struct timespec64 rhs) |
||
| 111 | { |
||
| 112 | struct timespec64 ts_delta; |
||
| 113 | set_normalized_timespec64(&ts_delta, lhs.tv_sec + rhs.tv_sec, |
||
| 114 | lhs.tv_nsec + rhs.tv_nsec); |
||
| 115 | return ts_delta; |
||
| 116 | } |
||
| 117 | |||
| 118 | /* |
||
| 119 | * sub = lhs - rhs, in normalized form |
||
| 120 | */ |
||
| 121 | static inline struct timespec64 timespec64_sub(struct timespec64 lhs, |
||
| 122 | struct timespec64 rhs) |
||
| 123 | { |
||
| 124 | struct timespec64 ts_delta; |
||
| 125 | set_normalized_timespec64(&ts_delta, lhs.tv_sec - rhs.tv_sec, |
||
| 126 | lhs.tv_nsec - rhs.tv_nsec); |
||
| 127 | return ts_delta; |
||
| 128 | } |
||
| 129 | |||
| 130 | /* |
||
| 131 | * Returns true if the timespec64 is norm, false if denorm: |
||
| 132 | */ |
||
| 133 | static inline bool timespec64_valid(const struct timespec64 *ts) |
||
| 134 | { |
||
| 135 | /* Dates before 1970 are bogus */ |
||
| 136 | if (ts->tv_sec < 0) |
||
| 137 | return false; |
||
| 138 | /* Can't have more nanoseconds then a second */ |
||
| 139 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) |
||
| 140 | return false; |
||
| 141 | return true; |
||
| 142 | } |
||
| 143 | |||
| 144 | static inline bool timespec64_valid_strict(const struct timespec64 *ts) |
||
| 145 | { |
||
| 146 | if (!timespec64_valid(ts)) |
||
| 147 | return false; |
||
| 148 | /* Disallow values that could overflow ktime_t */ |
||
| 149 | if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX) |
||
| 150 | return false; |
||
| 151 | return true; |
||
| 152 | } |
||
| 153 | |||
| 154 | /** |
||
| 155 | * timespec64_to_ns - Convert timespec64 to nanoseconds |
||
| 156 | * @ts: pointer to the timespec64 variable to be converted |
||
| 157 | * |
||
| 158 | * Returns the scalar nanosecond representation of the timespec64 |
||
| 159 | * parameter. |
||
| 160 | */ |
||
| 161 | static inline s64 timespec64_to_ns(const struct timespec64 *ts) |
||
| 162 | { |
||
| 163 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; |
||
| 164 | } |
||
| 165 | |||
| 166 | /** |
||
| 167 | * ns_to_timespec64 - Convert nanoseconds to timespec64 |
||
| 168 | * @nsec: the nanoseconds value to be converted |
||
| 169 | * |
||
| 170 | * Returns the timespec64 representation of the nsec parameter. |
||
| 171 | */ |
||
| 172 | extern struct timespec64 ns_to_timespec64(const s64 nsec); |
||
| 173 | |||
| 174 | /** |
||
| 175 | * timespec64_add_ns - Adds nanoseconds to a timespec64 |
||
| 176 | * @a: pointer to timespec64 to be incremented |
||
| 177 | * @ns: unsigned nanoseconds value to be added |
||
| 178 | * |
||
| 179 | * This must always be inlined because its used from the x86-64 vdso, |
||
| 180 | * which cannot call other kernel functions. |
||
| 181 | */ |
||
| 182 | static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns) |
||
| 183 | { |
||
| 184 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); |
||
| 185 | a->tv_nsec = ns; |
||
| 186 | } |
||
| 187 | |||
| 188 | #endif |
||
| 189 | |||
| 190 | #endif /* _LINUX_TIME64_H */ |