Use double-checked locking instead of 'synchronized' in EventCache. (#52)

* Use double-checked locking instead of 'synchronized' in EventCache.

1 files changed, 6 insertions, 2 deletions

diff --git a/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/event/EventCache.java b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/event/EventCache.java
index 3d8775f..d150987 100644
--- a/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/event/EventCache.java
+++ b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/event/EventCache.java
@@ -42,9 +42,13 @@ public class EventCache {
 
     private EventCache() {}
 
-    public static synchronized EventCache getInstance() {
+    public static EventCache getInstance() {
         if (mEventCache == null) {
-            mEventCache = new EventCache();
+            synchronized (EventCache.class) {
+                if (mEventCache == null) {
+                    mEventCache = new EventCache();
+                }
+            }
         }
         return mEventCache;
     }