runtime: add fake time support back.
Revived from CL 15690048.
Fixes #5356.
LGTM=rsc
R=adg, dvyukov, rsc
CC=golang-codereviews
https://golang.org/cl/101400043
diff --git a/src/runtime/time.go b/src/runtime/time.go
index 8cf9eec..11862c7 100644
--- a/src/runtime/time.go
+++ b/src/runtime/time.go
@@ -35,8 +35,8 @@
t []*timer
}
-// nacl fake time support.
-var timens int64
+// nacl fake time support - time in nanoseconds since 1970
+var faketime int64
// Package time APIs.
// Godoc uses the comments in package time, not these.
@@ -194,7 +194,7 @@
f(arg, seq)
lock(&timers.lock)
}
- if delta < 0 {
+ if delta < 0 || faketime > 0 {
// No timers left - put goroutine to sleep.
timers.rescheduling = true
goparkunlock(&timers.lock, "timer goroutine (idle)")
@@ -208,6 +208,29 @@
}
}
+func timejump() *g {
+ if faketime == 0 {
+ return nil
+ }
+
+ lock(&timers.lock)
+ if !timers.created || len(timers.t) == 0 {
+ unlock(&timers.lock)
+ return nil
+ }
+
+ var gp *g
+ if faketime < timers.t[0].when {
+ faketime = timers.t[0].when
+ if timers.rescheduling {
+ timers.rescheduling = false
+ gp = timers.gp
+ }
+ }
+ unlock(&timers.lock)
+ return gp
+}
+
// Heap maintenance algorithms.
func siftupTimer(i int) {
