commit add334986778a09dce559f4d8b7ee69534abd47d
author Dmitriy Vyukov <dvyukov@google.com> Tue Mar 05 09:46:52 2013 +0200
committer Dmitriy Vyukov <dvyukov@google.com> Tue Mar 05 09:46:52 2013 +0200
tree 9a34043cf6fc15ca93a904ca2dae23099f7ac310
parent 2fe840f4f69bb1013ff5ae8968d8ab8257fb2d22

runtime: add atomic xchg64
It will be handy for network poller.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7429048

src/pkg/runtime/runtime.h

diff --git a/src/pkg/runtime/runtime.h b/src/pkg/runtime/runtime.h
index 585d6a5..8ed1843 100644
--- a/src/pkg/runtime/runtime.h
+++ b/src/pkg/runtime/runtime.h
@@ -691,6 +691,7 @@
 uint32	runtime·xadd(uint32 volatile*, int32);
 uint64	runtime·xadd64(uint64 volatile*, int64);
 uint32	runtime·xchg(uint32 volatile*, uint32);
+uint64	runtime·xchg64(uint64 volatile*, uint64);
 uint32	runtime·atomicload(uint32 volatile*);
 void	runtime·atomicstore(uint32 volatile*, uint32);
 void	runtime·atomicstore64(uint64 volatile*, uint64);