VirtualRefBasePtr.java revision 9fa4071c4768c63902c6a74a4b480b51a8b95d43
1/* 2 * Copyright (C) 2014 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 17package com.android.internal.util; 18 19/** 20 * Helper class that contains a strong reference to a VirtualRefBase native 21 * object. This will incStrong in the ctor, and decStrong in the finalizer 22 */ 23public final class VirtualRefBasePtr { 24 private long mNativePtr; 25 26 public VirtualRefBasePtr(long ptr) { 27 mNativePtr = ptr; 28 nIncStrong(mNativePtr); 29 } 30 31 public long get() { 32 return mNativePtr; 33 } 34 35 @Override 36 protected void finalize() throws Throwable { 37 try { 38 nDecStrong(mNativePtr); 39 mNativePtr = 0; 40 } finally { 41 super.finalize(); 42 } 43 } 44 45 private static native void nIncStrong(long ptr); 46 private static native void nDecStrong(long ptr); 47} 48