time: split os-dependent part into sys.go.

R=rsc
CC=golang-dev
https://golang.org/cl/4259051

src/pkg/time/Makefile

@@ -8,6 +8,7 @@ TARG=time
 GOFILES=\
 	format.go\
 	sleep.go\
+	sys.go\
 	tick.go\
 	time.go\
 

src/pkg/time/sleep.go

@@ -5,7 +5,6 @@
 package time
 
 import (
-	"os"
 	"syscall"
 	"sync"
 	"container/heap"
@@ -47,30 +46,6 @@ func init() {
 	timers.Push(&Timer{t: forever}) // sentinel
 }
 
-// Sleep pauses the current goroutine for at least ns nanoseconds.
-// Higher resolution sleeping may be provided by syscall.Nanosleep 
-// on some operating systems.
-func Sleep(ns int64) os.Error {
-	_, err := sleep(Nanoseconds(), ns)
-	return err
-}
-
-// sleep takes the current time and a duration,
-// pauses for at least ns nanoseconds, and
-// returns the current time and an error.
-func sleep(t, ns int64) (int64, os.Error) {
-	// TODO(cw): use monotonic-time once it's available
-	end := t + ns
-	for t < end {
-		errno := syscall.Sleep(end - t)
-		if errno != 0 && errno != syscall.EINTR {
-			return 0, os.NewSyscallError("sleep", errno)
-		}
-		t = Nanoseconds()
-	}
-	return t, nil
-}
-
 // NewTimer creates a new Timer that will send
 // the current time on its channel after at least ns nanoseconds.
 func NewTimer(ns int64) *Timer {

src/pkg/time/sys.go

@@ -0,0 +1,54 @@
+// Copyright 2009 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.
+
+package time
+
+import (
+	"os"
+	"syscall"
+)
+
+// Seconds reports the number of seconds since the Unix epoch,
+// January 1, 1970 00:00:00 UTC.
+func Seconds() int64 {
+	sec, _, err := os.Time()
+	if err != nil {
+		panic(err)
+	}
+	return sec
+}
+
+// Nanoseconds reports the number of nanoseconds since the Unix epoch,
+// January 1, 1970 00:00:00 UTC.
+func Nanoseconds() int64 {
+	sec, nsec, err := os.Time()
+	if err != nil {
+		panic(err)
+	}
+	return sec*1e9 + nsec
+}
+
+// Sleep pauses the current goroutine for at least ns nanoseconds.
+// Higher resolution sleeping may be provided by syscall.Nanosleep 
+// on some operating systems.
+func Sleep(ns int64) os.Error {
+	_, err := sleep(Nanoseconds(), ns)
+	return err
+}
+
+// sleep takes the current time and a duration,
+// pauses for at least ns nanoseconds, and
+// returns the current time and an error.
+func sleep(t, ns int64) (int64, os.Error) {
+	// TODO(cw): use monotonic-time once it's available
+	end := t + ns
+	for t < end {
+		errno := syscall.Sleep(end - t)
+		if errno != 0 && errno != syscall.EINTR {
+			return 0, os.NewSyscallError("sleep", errno)
+		}
+		t = Nanoseconds()
+	}
+	return t, nil
+}

src/pkg/time/time.go

@@ -6,30 +6,6 @@
 // displaying time.
 package time
 
-import (
-	"os"
-)
-
-// Seconds reports the number of seconds since the Unix epoch,
-// January 1, 1970 00:00:00 UTC.
-func Seconds() int64 {
-	sec, _, err := os.Time()
-	if err != nil {
-		panic(err)
-	}
-	return sec
-}
-
-// Nanoseconds reports the number of nanoseconds since the Unix epoch,
-// January 1, 1970 00:00:00 UTC.
-func Nanoseconds() int64 {
-	sec, nsec, err := os.Time()
-	if err != nil {
-		panic(err)
-	}
-	return sec*1e9 + nsec
-}
-
 // Days of the week.
 const (
 	Sunday = iota