1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.internal.util;
18 
19 import com.android.layoutlib.bridge.impl.DelegateManager;
20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
21 
22 import android.util.LongSparseLongArray;
23 
24 /**
25  * Delegate used to provide new implementation the native methods of {@link VirtualRefBasePtr}
26  *
27  * Through the layoutlib_create tool, the original native  methods of VirtualRefBasePtr have been
28  * replaced by calls to methods of the same name in this delegate class.
29  *
30  */
31 @SuppressWarnings("unused")
32 public class VirtualRefBasePtr_Delegate {
33     private static final DelegateManager<Object> sManager = new DelegateManager<>(Object.class);
34     private static final LongSparseLongArray sRefCount = new LongSparseLongArray();
35 
36     @LayoutlibDelegate
nIncStrong(long ptr)37     /*package*/ static synchronized void nIncStrong(long ptr) {
38         long counter = sRefCount.get(ptr);
39         sRefCount.put(ptr, ++counter);
40     }
41 
42     @LayoutlibDelegate
nDecStrong(long ptr)43     /*package*/ static synchronized void nDecStrong(long ptr) {
44         long counter = sRefCount.get(ptr);
45 
46         if (counter > 1) {
47             sRefCount.put(ptr, --counter);
48         } else {
49             sRefCount.delete(ptr);
50             sManager.removeJavaReferenceFor(ptr);
51         }
52     }
53 }
54