1 // Copyright 2017 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos 6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos 7 8 package unix 9 10 import "time" 11 12 // TimespecToNSec returns the time stored in ts as nanoseconds. 13 func TimespecToNsec(ts Timespec) int64 { return ts.Nano() } 14 15 // NsecToTimespec converts a number of nanoseconds into a Timespec. 16 func NsecToTimespec(nsec int64) Timespec { 17 sec := nsec / 1e9 18 nsec = nsec % 1e9 19 if nsec < 0 { 20 nsec += 1e9 21 sec-- 22 } 23 return setTimespec(sec, nsec) 24 } 25 26 // TimeToTimespec converts t into a Timespec. 27 // On some 32-bit systems the range of valid Timespec values are smaller 28 // than that of time.Time values. So if t is out of the valid range of 29 // Timespec, it returns a zero Timespec and ERANGE. 30 func TimeToTimespec(t time.Time) (Timespec, error) { 31 sec := t.Unix() 32 nsec := int64(t.Nanosecond()) 33 ts := setTimespec(sec, nsec) 34 35 // Currently all targets have either int32 or int64 for Timespec.Sec. 36 // If there were a new target with floating point type for it, we have 37 // to consider the rounding error. 38 if int64(ts.Sec) != sec { 39 return Timespec{}, ERANGE 40 } 41 return ts, nil 42 } 43 44 // TimevalToNsec returns the time stored in tv as nanoseconds. 45 func TimevalToNsec(tv Timeval) int64 { return tv.Nano() } 46 47 // NsecToTimeval converts a number of nanoseconds into a Timeval. 48 func NsecToTimeval(nsec int64) Timeval { 49 nsec += 999 // round up to microsecond 50 usec := nsec % 1e9 / 1e3 51 sec := nsec / 1e9 52 if usec < 0 { 53 usec += 1e6 54 sec-- 55 } 56 return setTimeval(sec, usec) 57 } 58 59 // Unix returns the time stored in ts as seconds plus nanoseconds. 60 func (ts *Timespec) Unix() (sec int64, nsec int64) { 61 return int64(ts.Sec), int64(ts.Nsec) 62 } 63 64 // Unix returns the time stored in tv as seconds plus nanoseconds. 65 func (tv *Timeval) Unix() (sec int64, nsec int64) { 66 return int64(tv.Sec), int64(tv.Usec) * 1000 67 } 68 69 // Nano returns the time stored in ts as nanoseconds. 70 func (ts *Timespec) Nano() int64 { 71 return int64(ts.Sec)*1e9 + int64(ts.Nsec) 72 } 73 74 // Nano returns the time stored in tv as nanoseconds. 75 func (tv *Timeval) Nano() int64 { 76 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 77 } 78