| /* |
| * Copyright (C) 2016 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 com.android.car.apps.common; |
| |
| /** |
| * @hide |
| */ |
| public class RefcountObject<T> { |
| |
| public interface RefcountListener { |
| void onRefcountZero(RefcountObject<?> object); |
| } |
| |
| private RefcountObject.RefcountListener mRefcountListener; |
| private int mRefcount; |
| private T mObject; |
| |
| public RefcountObject(T object) { |
| mObject = object; |
| } |
| |
| public void setRefcountListener(RefcountObject.RefcountListener listener) { |
| mRefcountListener = listener; |
| } |
| |
| public synchronized int addRef() { |
| mRefcount++; |
| return mRefcount; |
| } |
| |
| public synchronized int releaseRef() { |
| mRefcount--; |
| if (mRefcount == 0 && mRefcountListener != null) { |
| mRefcountListener.onRefcountZero(this); |
| } |
| return mRefcount; |
| } |
| |
| public synchronized int getRef() { |
| return mRefcount; |
| } |
| |
| public T getObject() { |
| return mObject; |
| } |
| } |