blob: 47b9011ee9636fd7672764c0442cf463dc7b78f6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package unix
import "time"
// TimespecToNsec converts a Timespec value into a number of
// nanoseconds since the Unix epoch.
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
// NsecToTimespec takes a number of nanoseconds since the Unix epoch
// and returns the corresponding Timespec value.
func NsecToTimespec(nsec int64) Timespec {
sec := nsec / 1e9
nsec = nsec % 1e9
if nsec < 0 {
nsec += 1e9
sec--
}
return setTimespec(sec, nsec)
}
// TimeToTimespec converts t into a Timespec.
// On some 32-bit systems the range of valid Timespec values are smaller
// than that of time.Time values. So if t is out of the valid range of
// Timespec, it returns a zero Timespec and ERANGE.
func TimeToTimespec(t time.Time) (Timespec, error) {
sec := t.Unix()
nsec := int64(t.Nanosecond())
ts := setTimespec(sec, nsec)
// Currently all targets have either int32 or int64 for Timespec.Sec.
// If there were a new target with floating point type for it, we have
// to consider the rounding error.
if int64(ts.Sec) != sec {
return Timespec{}, ERANGE
}
return ts, nil
}
// TimevalToNsec converts a Timeval value into a number of nanoseconds
// since the Unix epoch.
func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
// NsecToTimeval takes a number of nanoseconds since the Unix epoch
// and returns the corresponding Timeval value.
func NsecToTimeval(nsec int64) Timeval {
nsec += 999 // round up to microsecond
usec := nsec % 1e9 / 1e3
sec := nsec / 1e9
if usec < 0 {
usec += 1e6
sec--
}
return setTimeval(sec, usec)
}
// Unix returns ts as the number of seconds and nanoseconds elapsed since the
// Unix epoch.
func (ts *Timespec) Unix() (sec int64, nsec int64) {
return int64(ts.Sec), int64(ts.Nsec)
}
// Unix returns tv as the number of seconds and nanoseconds elapsed since the
// Unix epoch.
func (tv *Timeval) Unix() (sec int64, nsec int64) {
return int64(tv.Sec), int64(tv.Usec) * 1000
}
// Nano returns ts as the number of nanoseconds elapsed since the Unix epoch.
func (ts *Timespec) Nano() int64 {
return int64(ts.Sec)*1e9 + int64(ts.Nsec)
}
// Nano returns tv as the number of nanoseconds elapsed since the Unix epoch.
func (tv *Timeval) Nano() int64 {
return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
}
|