runtime: introduce notetsleepg function
notetsleepg is the same as notetsleep, but is called on user g.
It includes entersyscall/exitsyscall and will help to avoid
split stack functions in syscall status.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/11681043
diff --git a/src/pkg/runtime/runtime.h b/src/pkg/runtime/runtime.h
index f8d45ba..244b548 100644
--- a/src/pkg/runtime/runtime.h
+++ b/src/pkg/runtime/runtime.h
@@ -905,11 +905,15 @@
* wake up early, it must wait to call noteclear until it
* can be sure that no other goroutine is calling
* notewakeup.
+ *
+ * notesleep/notetsleep are generally called on g0,
+ * notetsleepg is similar to notetsleep but is called on user g.
*/
void runtime·noteclear(Note*);
void runtime·notesleep(Note*);
void runtime·notewakeup(Note*);
bool runtime·notetsleep(Note*, int64); // false - timeout
+bool runtime·notetsleepg(Note*, int64); // false - timeout
/*
* low-level synchronization for implementing the above
