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1 // Copyright 2017 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
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6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
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7
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8 package unix
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9
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10 import "time"
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11
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12 // TimespecToNSec returns the time stored in ts as nanoseconds.
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13 func TimespecToNsec(ts Timespec) int64 { return ts.Nano() }
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14
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15 // NsecToTimespec converts a number of nanoseconds into a Timespec.
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16 func NsecToTimespec(nsec int64) Timespec {
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17 sec := nsec / 1e9
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18 nsec = nsec % 1e9
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19 if nsec < 0 {
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20 nsec += 1e9
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21 sec--
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22 }
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23 return setTimespec(sec, nsec)
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24 }
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25
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26 // TimeToTimespec converts t into a Timespec.
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27 // On some 32-bit systems the range of valid Timespec values are smaller
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28 // than that of time.Time values. So if t is out of the valid range of
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29 // Timespec, it returns a zero Timespec and ERANGE.
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30 func TimeToTimespec(t time.Time) (Timespec, error) {
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31 sec := t.Unix()
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32 nsec := int64(t.Nanosecond())
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33 ts := setTimespec(sec, nsec)
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34
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35 // Currently all targets have either int32 or int64 for Timespec.Sec.
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36 // If there were a new target with floating point type for it, we have
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37 // to consider the rounding error.
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38 if int64(ts.Sec) != sec {
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39 return Timespec{}, ERANGE
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40 }
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41 return ts, nil
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42 }
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43
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44 // TimevalToNsec returns the time stored in tv as nanoseconds.
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45 func TimevalToNsec(tv Timeval) int64 { return tv.Nano() }
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46
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47 // NsecToTimeval converts a number of nanoseconds into a Timeval.
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48 func NsecToTimeval(nsec int64) Timeval {
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49 nsec += 999 // round up to microsecond
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50 usec := nsec % 1e9 / 1e3
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51 sec := nsec / 1e9
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52 if usec < 0 {
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53 usec += 1e6
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54 sec--
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55 }
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56 return setTimeval(sec, usec)
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57 }
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58
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59 // Unix returns the time stored in ts as seconds plus nanoseconds.
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60 func (ts *Timespec) Unix() (sec int64, nsec int64) {
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61 return int64(ts.Sec), int64(ts.Nsec)
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62 }
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63
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64 // Unix returns the time stored in tv as seconds plus nanoseconds.
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65 func (tv *Timeval) Unix() (sec int64, nsec int64) {
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66 return int64(tv.Sec), int64(tv.Usec) * 1000
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67 }
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68
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69 // Nano returns the time stored in ts as nanoseconds.
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70 func (ts *Timespec) Nano() int64 {
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71 return int64(ts.Sec)*1e9 + int64(ts.Nsec)
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72 }
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73
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74 // Nano returns the time stored in tv as nanoseconds.
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75 func (tv *Timeval) Nano() int64 {
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76 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
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77 }
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