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time: Sleep through interruptions
R=rsc CC=golang-dev https://golang.org/cl/202043
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@ -11,5 +11,16 @@ import (
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// Sleep pauses the current goroutine for at least ns nanoseconds. Higher resolution
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// Sleep pauses the current goroutine for at least ns nanoseconds. Higher resolution
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// sleeping may be provided by syscall.Nanosleep on some operating systems.
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// sleeping may be provided by syscall.Nanosleep on some operating systems.
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// Sleep returns os.EINTR if interrupted.
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func Sleep(ns int64) os.Error {
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func Sleep(ns int64) os.Error { return os.NewSyscallError("sleep", syscall.Sleep(ns)) }
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// TODO(cw): use monotonic-time once it's available
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t := Nanoseconds()
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end := t + ns
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for t < end {
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errno := syscall.Sleep(end - 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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t = Nanoseconds()
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}
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return nil
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}
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26
src/pkg/time/sleep_test.go
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26
src/pkg/time/sleep_test.go
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@ -0,0 +1,26 @@
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// 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_test
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import (
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"os"
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"syscall"
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"testing"
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. "time"
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)
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func TestSleep(t *testing.T) {
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const delay = int64(100e6)
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go func() {
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Sleep(delay / 2)
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syscall.Kill(os.Getpid(), syscall.SIGCHLD)
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}()
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start := Nanoseconds()
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Sleep(delay)
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duration := Nanoseconds() - start
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if duration < delay {
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t.Fatalf("Sleep(%d) slept for only %d ns", delay, duration)
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}
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}
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