From d1767bbf672355b9063099d641106dd4ea5303b3 Mon Sep 17 00:00:00 2001
From: shin- <joffrey@dotcloud.com>
Date: Wed, 3 Apr 2013 05:39:39 -0700
Subject: [PATCH] Moved resetLock() to the Load() method ; changed resetLock()
 to initLock() and changed behavior to not modify the lock if it was already
 set (not nil)

---
 container.go | 1 -
 runtime.go   | 1 +
 state.go     | 8 +++++---
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/container.go b/container.go
index b89885a17e..8f993a35e1 100644
--- a/container.go
+++ b/container.go
@@ -127,7 +127,6 @@ func (container *Container) FromDisk() error {
 	if err := json.Unmarshal(data, container); err != nil {
 		return err
 	}
-	container.State.resetLock()
 	return nil
 }
 
diff --git a/runtime.go b/runtime.go
index 9f571cf45a..e096202c61 100644
--- a/runtime.go
+++ b/runtime.go
@@ -117,6 +117,7 @@ func (runtime *Runtime) Load(id string) (*Container, error) {
 	if err := container.FromDisk(); err != nil {
 		return nil, err
 	}
+	container.State.initLock()
 	if container.Id != id {
 		return container, fmt.Errorf("Container %s is stored at %s", container.Id, id)
 	}
diff --git a/state.go b/state.go
index c7e89f2e65..bf325a3eac 100644
--- a/state.go
+++ b/state.go
@@ -39,9 +39,11 @@ func (s *State) setStopped(exitCode int) {
 	s.broadcast()
 }
 
-func (s *State) resetLock() {
-	s.stateChangeLock = &sync.Mutex{}
-	s.stateChangeCond = sync.NewCond(s.stateChangeLock)
+func (s *State) initLock() {
+	if s.stateChangeLock == nil {
+		s.stateChangeLock = &sync.Mutex{}
+		s.stateChangeCond = sync.NewCond(s.stateChangeLock)
+	}
 }
 
 func (s *State) broadcast() {