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1 /*- |
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2 * Copyright (c) 1982, 1986, 1993 |
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3 * The Regents of the University of California. All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions |
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7 * are met: |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * 2. Redistributions in binary form must reproduce the above copyright |
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11 * notice, this list of conditions and the following disclaimer in the |
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12 * documentation and/or other materials provided with the distribution. |
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13 * 4. Neither the name of the University nor the names of its contributors |
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14 * may be used to endorse or promote products derived from this software |
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15 * without specific prior written permission. |
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16 * |
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17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 * SUCH DAMAGE. |
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28 * © * Portions Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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29 * @(#)time.h 8.5 (Berkeley) 5/4/95 |
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30 * $FreeBSD: src/sys/sys/time.h,v 1.69 2005/04/02 12:33:27 das Exp $ |
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31 */ |
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32 |
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33 #ifndef _SYS_TIME_H_ |
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34 #define _SYS_TIME_H_ |
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35 |
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36 #include <sys/_timeval.h> |
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37 #include <sys/types.h> |
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38 #include <sys/timespec.h> |
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39 |
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40 struct timezone { |
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41 int tz_minuteswest; /* minutes west of Greenwich */ |
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42 int tz_dsttime; /* type of dst correction */ |
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43 }; |
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44 #define DST_NONE 0 /* not on dst */ |
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45 #define DST_USA 1 /* USA style dst */ |
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46 #define DST_AUST 2 /* Australian style dst */ |
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47 #define DST_WET 3 /* Western European dst */ |
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48 #define DST_MET 4 /* Middle European dst */ |
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49 #define DST_EET 5 /* Eastern European dst */ |
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50 #define DST_CAN 6 /* Canada */ |
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51 |
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52 #if __BSD_VISIBLE |
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53 struct bintime { |
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54 time_t sec; |
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55 uint64_t frac; |
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56 }; |
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57 |
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58 static __inline void |
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59 bintime_addx(struct bintime *bt, uint64_t x) |
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60 { |
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61 uint64_t u; |
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62 |
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63 u = bt->frac; |
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64 bt->frac += x; |
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65 if (u > bt->frac) |
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66 bt->sec++; |
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67 } |
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68 |
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69 static __inline void |
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70 bintime_add(struct bintime *bt, const struct bintime *bt2) |
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71 { |
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72 uint64_t u; |
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73 |
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74 u = bt->frac; |
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75 bt->frac += bt2->frac; |
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76 if (u > bt->frac) |
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77 bt->sec++; |
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78 bt->sec += bt2->sec; |
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79 } |
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80 |
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81 static __inline void |
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82 bintime_sub(struct bintime *bt, const struct bintime *bt2) |
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83 { |
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84 uint64_t u; |
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85 |
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86 u = bt->frac; |
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87 bt->frac -= bt2->frac; |
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88 if (u < bt->frac) |
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89 bt->sec--; |
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90 bt->sec -= bt2->sec; |
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91 } |
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92 |
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93 /*- |
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94 * Background information: |
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95 * |
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96 * When converting between timestamps on parallel timescales of differing |
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97 * resolutions it is historical and scientific practice to round down rather |
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98 * than doing 4/5 rounding. |
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99 * |
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100 * The date changes at midnight, not at noon. |
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101 * |
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102 * Even at 15:59:59.999999999 it's not four'o'clock. |
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103 * |
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104 * time_second ticks after N.999999999 not after N.4999999999 |
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105 */ |
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106 |
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107 static __inline void |
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108 bintime2timespec(const struct bintime *bt, struct timespec *ts) |
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109 { |
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110 |
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111 ts->tv_sec = bt->sec; |
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112 ts->tv_nsec = ((uint64_t)1000000000 * (uint32_t)(bt->frac >> 32)) >> 32; |
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113 } |
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114 |
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115 static __inline void |
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116 timespec2bintime(const struct timespec *ts, struct bintime *bt) |
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117 { |
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118 |
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119 bt->sec = ts->tv_sec; |
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120 /* 18446744073 = int(2^64 / 1000000000) */ |
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121 bt->frac = ts->tv_nsec * (uint64_t)18446744073LL; |
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122 } |
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123 |
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124 static __inline void |
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125 bintime2timeval(const struct bintime *bt, struct timeval *tv) |
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126 { |
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127 |
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128 tv->tv_sec = bt->sec; |
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129 tv->tv_usec = ((uint64_t)1000000 * (uint32_t)(bt->frac >> 32)) >> 32; |
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130 } |
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131 |
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132 static __inline void |
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133 timeval2bintime(const struct timeval *tv, struct bintime *bt) |
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134 { |
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135 |
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136 bt->sec = tv->tv_sec; |
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137 /* 18446744073709 = int(2^64 / 1000000) */ |
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138 bt->frac = tv->tv_usec * (uint64_t)18446744073709LL; |
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139 } |
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140 #endif /* __BSD_VISIBLE */ |
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141 |
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142 /* |
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143 * Names of the interval timers, and structure |
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144 * defining a timer setting. |
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145 */ |
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146 #define ITIMER_REAL 0 |
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147 #define ITIMER_VIRTUAL 1 |
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148 #define ITIMER_PROF 2 |
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149 |
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150 struct itimerval { |
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151 struct timeval it_interval; /* timer interval */ |
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152 struct timeval it_value; /* current value */ |
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153 }; |
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154 |
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155 /* |
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156 * Getkerninfo clock information structure |
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157 */ |
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158 struct clockinfo { |
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159 int hz; /* clock frequency */ |
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160 int tick; /* micro-seconds per hz tick */ |
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161 int spare; |
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162 int stathz; /* statistics clock frequency */ |
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163 int profhz; /* profiling clock frequency */ |
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164 }; |
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165 |
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166 #include <time.h> |
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167 |
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168 #include <sys/cdefs.h> |
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169 |
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170 __BEGIN_DECLS |
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171 IMPORT_C int adjtime(const struct timeval *, struct timeval *); |
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172 IMPORT_C int gettimeofday(struct timeval *, struct timezone *); |
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173 int settimeofday(const struct timeval *, const struct timezone *); |
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174 IMPORT_C int utimes(const char *, const struct timeval *); |
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175 __END_DECLS |
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176 |
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177 |
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178 #endif /* !_SYS_TIME_H_ */ |