AI 143890: Fixes #1749387. Improve the pooling of the VelocityTracker class. This introduces a new, hidden, API for pooling objects easily.

  BUG=1749387

Automated import of CL 143890

1 files changed, 48 insertions, 0 deletions

diff --git a/core/java/android/util/SynchronizedPool.java b/core/java/android/util/SynchronizedPool.java
new file mode 100644
index 0000000..651e0c3
--- /dev/null
+++ b/core/java/android/util/SynchronizedPool.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.util;
+
+/**
+ *
+ * @hide
+ */
+class SynchronizedPool<T extends Poolable<T>> implements Pool<T> {
+    private final Pool<T> mPool;
+    private final Object mLock;
+
+    public SynchronizedPool(Pool<T> pool) {
+        mPool = pool;
+        mLock = this;
+    }
+
+    public SynchronizedPool(Pool<T> pool, Object lock) {
+        mPool = pool;
+        mLock = lock;
+    }
+
+    public T acquire() {
+        synchronized (mLock) {
+            return mPool.acquire();
+        }
+    }
+
+    public void release(T element) {
+        synchronized (mLock) {
+            mPool.release(element);
+        }
+    }
+}