add time.Tick()
R=r
DELTA=130 (115 added, 1 deleted, 14 changed)
OCL=20376
CL=20385
diff --git a/src/lib/time/tick.go b/src/lib/time/tick.go
new file mode 100644
index 0000000..efd5ceb
--- /dev/null
+++ b/src/lib/time/tick.go
@@ -0,0 +1,42 @@
+// 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 (
+ "syscall";
+ "time"
+)
+
+// TODO(rsc): This implementation of time.Tick is a
+// simple placeholder. Eventually, there will need to be
+// a single central time server no matter how many tickers
+// are active. There also needs to be a way to cancel a ticker.
+//
+// Also, if timeouts become part of the select statement,
+// perhaps the Ticker is just:
+//
+// func Ticker(ns int64, c *chan int64) {
+// for {
+// select { timeout ns: }
+// nsec, err := time.Nanoseconds();
+// c <- nsec;
+// }
+
+func Ticker(ns int64, c *chan int64) {
+ var tv syscall.Timeval;
+ for {
+ syscall.nstotimeval(ns, &tv);
+ syscall.Syscall6(syscall.SYS_SELECT, 0, 0, 0, 0, syscall.TimevalPtr(&tv), 0);
+ nsec, err := time.Nanoseconds();
+ c <- nsec;
+ }
+}
+
+export func Tick(ns int64) *chan int64 {
+ c := new(chan int64);
+ go Ticker(ns, c);
+ return c;
+}
+
