63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package time
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import (
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"os"
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"syscall"
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)
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// Seconds reports the number of seconds since the Unix epoch,
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// January 1, 1970 00:00:00 UTC.
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func Seconds() int64 {
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sec, _, err := os.Time()
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if err != nil {
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panic(err)
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}
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return sec
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}
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// Nanoseconds reports the number of nanoseconds since the Unix epoch,
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// January 1, 1970 00:00:00 UTC.
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func Nanoseconds() int64 {
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sec, nsec, err := os.Time()
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if err != nil {
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panic(err)
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}
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return sec*1e9 + nsec
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}
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// Sleep pauses the current goroutine for at least ns nanoseconds.
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// Higher resolution sleeping may be provided by syscall.Nanosleep
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// on some operating systems.
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func Sleep(ns int64) os.Error {
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_, err := sleep(Nanoseconds(), ns)
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return err
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}
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// sleep takes the current time and a duration,
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// pauses for at least ns nanoseconds, and
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// returns the current time and an error.
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func sleep(t, ns int64) (int64, os.Error) {
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// TODO(cw): use monotonic-time once it's available
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end := t + ns
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for t < end {
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err := sysSleep(end - t)
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if err != nil {
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return 0, err
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}
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t = Nanoseconds()
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}
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return t, nil
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}
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func sysSleep(t int64) os.Error {
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errno := syscall.Sleep(t)
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if errno != 0 && errno != syscall.EINTR {
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return os.NewSyscallError("sleep", errno)
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}
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return nil
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}
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