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5270 | serge | 1 | #ifndef _LINUX_TIME64_H |
2 | #define _LINUX_TIME64_H |
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3 | |||
4 | #include |
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6082 | serge | 5 | #include |
5270 | serge | 6 | |
7 | typedef __s64 time64_t; |
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8 | |||
9 | /* |
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10 | * This wants to go into uapi/linux/time.h once we agreed about the |
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11 | * userspace interfaces. |
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12 | */ |
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13 | #if __BITS_PER_LONG == 64 |
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14 | # define timespec64 timespec |
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6082 | serge | 15 | #define itimerspec64 itimerspec |
5270 | serge | 16 | #else |
17 | struct timespec64 { |
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18 | time64_t tv_sec; /* seconds */ |
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19 | long tv_nsec; /* nanoseconds */ |
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20 | }; |
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6082 | serge | 21 | |
22 | struct itimerspec64 { |
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23 | struct timespec64 it_interval; |
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24 | struct timespec64 it_value; |
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25 | }; |
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26 | |||
5270 | serge | 27 | #endif |
28 | |||
29 | /* Parameters used to convert the timespec values: */ |
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30 | #define MSEC_PER_SEC 1000L |
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31 | #define USEC_PER_MSEC 1000L |
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32 | #define NSEC_PER_USEC 1000L |
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33 | #define NSEC_PER_MSEC 1000000L |
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34 | #define USEC_PER_SEC 1000000L |
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35 | #define NSEC_PER_SEC 1000000000L |
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36 | #define FSEC_PER_SEC 1000000000000000LL |
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37 | |||
38 | /* Located here for timespec[64]_valid_strict */ |
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6082 | serge | 39 | #define TIME64_MAX ((s64)~((u64)1 << 63)) |
5270 | serge | 40 | #define KTIME_MAX ((s64)~((u64)1 << 63)) |
41 | #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC) |
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42 | |||
43 | #if __BITS_PER_LONG == 64 |
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44 | |||
45 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) |
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46 | { |
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47 | return ts64; |
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48 | } |
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49 | |||
50 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) |
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51 | { |
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52 | return ts; |
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53 | } |
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54 | |||
6082 | serge | 55 | static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64) |
56 | { |
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57 | return *its64; |
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58 | } |
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59 | |||
60 | static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its) |
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61 | { |
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62 | return *its; |
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63 | } |
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64 | |||
5270 | serge | 65 | # define timespec64_equal timespec_equal |
66 | # define timespec64_compare timespec_compare |
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67 | # define set_normalized_timespec64 set_normalized_timespec |
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68 | # define timespec64_add_safe timespec_add_safe |
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69 | # define timespec64_add timespec_add |
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70 | # define timespec64_sub timespec_sub |
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71 | # define timespec64_valid timespec_valid |
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72 | # define timespec64_valid_strict timespec_valid_strict |
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73 | # define timespec64_to_ns timespec_to_ns |
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74 | # define ns_to_timespec64 ns_to_timespec |
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75 | # define timespec64_add_ns timespec_add_ns |
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76 | |||
77 | #else |
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78 | |||
79 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) |
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80 | { |
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81 | struct timespec ret; |
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82 | |||
83 | ret.tv_sec = (time_t)ts64.tv_sec; |
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84 | ret.tv_nsec = ts64.tv_nsec; |
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85 | return ret; |
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86 | } |
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87 | |||
88 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) |
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89 | { |
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90 | struct timespec64 ret; |
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91 | |||
92 | ret.tv_sec = ts.tv_sec; |
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93 | ret.tv_nsec = ts.tv_nsec; |
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94 | return ret; |
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95 | } |
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96 | |||
6082 | serge | 97 | static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64) |
98 | { |
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99 | struct itimerspec ret; |
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100 | |||
101 | ret.it_interval = timespec64_to_timespec(its64->it_interval); |
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102 | ret.it_value = timespec64_to_timespec(its64->it_value); |
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103 | return ret; |
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104 | } |
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105 | |||
106 | static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its) |
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107 | { |
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108 | struct itimerspec64 ret; |
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109 | |||
110 | ret.it_interval = timespec_to_timespec64(its->it_interval); |
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111 | ret.it_value = timespec_to_timespec64(its->it_value); |
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112 | return ret; |
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113 | } |
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114 | |||
5270 | serge | 115 | static inline int timespec64_equal(const struct timespec64 *a, |
116 | const struct timespec64 *b) |
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117 | { |
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118 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); |
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119 | } |
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120 | |||
121 | /* |
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122 | * lhs < rhs: return <0 |
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123 | * lhs == rhs: return 0 |
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124 | * lhs > rhs: return >0 |
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125 | */ |
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126 | static inline int timespec64_compare(const struct timespec64 *lhs, const struct timespec64 *rhs) |
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127 | { |
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128 | if (lhs->tv_sec < rhs->tv_sec) |
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129 | return -1; |
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130 | if (lhs->tv_sec > rhs->tv_sec) |
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131 | return 1; |
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132 | return lhs->tv_nsec - rhs->tv_nsec; |
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133 | } |
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134 | |||
135 | extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec); |
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136 | |||
137 | /* |
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138 | * timespec64_add_safe assumes both values are positive and checks for |
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139 | * overflow. It will return TIME_T_MAX if the returned value would be |
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140 | * smaller then either of the arguments. |
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141 | */ |
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142 | extern struct timespec64 timespec64_add_safe(const struct timespec64 lhs, |
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143 | const struct timespec64 rhs); |
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144 | |||
145 | |||
146 | static inline struct timespec64 timespec64_add(struct timespec64 lhs, |
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147 | struct timespec64 rhs) |
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148 | { |
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149 | struct timespec64 ts_delta; |
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150 | set_normalized_timespec64(&ts_delta, lhs.tv_sec + rhs.tv_sec, |
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151 | lhs.tv_nsec + rhs.tv_nsec); |
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152 | return ts_delta; |
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153 | } |
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154 | |||
155 | /* |
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156 | * sub = lhs - rhs, in normalized form |
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157 | */ |
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158 | static inline struct timespec64 timespec64_sub(struct timespec64 lhs, |
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159 | struct timespec64 rhs) |
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160 | { |
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161 | struct timespec64 ts_delta; |
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162 | set_normalized_timespec64(&ts_delta, lhs.tv_sec - rhs.tv_sec, |
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163 | lhs.tv_nsec - rhs.tv_nsec); |
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164 | return ts_delta; |
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165 | } |
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166 | |||
167 | /* |
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168 | * Returns true if the timespec64 is norm, false if denorm: |
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169 | */ |
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170 | static inline bool timespec64_valid(const struct timespec64 *ts) |
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171 | { |
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172 | /* Dates before 1970 are bogus */ |
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173 | if (ts->tv_sec < 0) |
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174 | return false; |
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175 | /* Can't have more nanoseconds then a second */ |
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176 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) |
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177 | return false; |
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178 | return true; |
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179 | } |
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180 | |||
181 | static inline bool timespec64_valid_strict(const struct timespec64 *ts) |
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182 | { |
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183 | if (!timespec64_valid(ts)) |
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184 | return false; |
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185 | /* Disallow values that could overflow ktime_t */ |
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186 | if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX) |
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187 | return false; |
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188 | return true; |
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189 | } |
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190 | |||
191 | /** |
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192 | * timespec64_to_ns - Convert timespec64 to nanoseconds |
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193 | * @ts: pointer to the timespec64 variable to be converted |
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194 | * |
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195 | * Returns the scalar nanosecond representation of the timespec64 |
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196 | * parameter. |
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197 | */ |
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198 | static inline s64 timespec64_to_ns(const struct timespec64 *ts) |
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199 | { |
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200 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; |
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201 | } |
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202 | |||
203 | /** |
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204 | * ns_to_timespec64 - Convert nanoseconds to timespec64 |
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205 | * @nsec: the nanoseconds value to be converted |
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206 | * |
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207 | * Returns the timespec64 representation of the nsec parameter. |
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208 | */ |
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209 | extern struct timespec64 ns_to_timespec64(const s64 nsec); |
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210 | |||
211 | /** |
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212 | * timespec64_add_ns - Adds nanoseconds to a timespec64 |
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213 | * @a: pointer to timespec64 to be incremented |
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214 | * @ns: unsigned nanoseconds value to be added |
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215 | * |
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216 | * This must always be inlined because its used from the x86-64 vdso, |
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217 | * which cannot call other kernel functions. |
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218 | */ |
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219 | static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns) |
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220 | { |
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221 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); |
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222 | a->tv_nsec = ns; |
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223 | } |
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224 | |||
225 | #endif |
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226 | |||
227 | #endif /* _LINUX_TIME64_H */>>0 |