diff options
author | Niall Sheridan <nsheridan@gmail.com> | 2018-06-20 22:39:07 +0100 |
---|---|---|
committer | Niall Sheridan <nsheridan@gmail.com> | 2018-06-20 22:39:07 +0100 |
commit | de6d2c524430287c699aaa898c1325da6afea539 (patch) | |
tree | f78eb841208d667668a7bc92a9290d693cc7103b /vendor/golang.org/x/sys/unix/timestruct.go | |
parent | eb99016e1629e690e55633de6fc63a14c53e7ea2 (diff) |
Update dependencies
Diffstat (limited to 'vendor/golang.org/x/sys/unix/timestruct.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/timestruct.go | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/timestruct.go b/vendor/golang.org/x/sys/unix/timestruct.go new file mode 100644 index 0000000..47b9011 --- /dev/null +++ b/vendor/golang.org/x/sys/unix/timestruct.go @@ -0,0 +1,82 @@ +// 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 +} |