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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/*
* Copyright (C) 2012 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 java.lang;
import com.android.dex.Dex;
import java.lang.reflect.ArtField;
import java.lang.reflect.ArtMethod;
/**
* A dex cache holds resolved copies of strings, fields, methods, and classes from the dexfile.
*/
final class DexCache {
/** Lazily initialized dex file wrapper. Volatile to avoid double-check locking issues. */
private volatile Dex dex;
/** Indexed by the type index array of locations of initialized static storage. */
Object[] initializedStaticStorage;
/** The location of the associated dex file. */
String location;
/**
* References to fields as they become resolved following interpreter semantics. May refer to
* fields defined in other dex files.
*/
ArtField[] resolvedFields;
/**
* References to methods as they become resolved following interpreter semantics. May refer to
* methods defined in other dex files.
*/
ArtMethod[] resolvedMethods;
/**
* References to types as they become resolved following interpreter semantics. May refer to
* types defined in other dex files.
*/
Class[] resolvedTypes;
/**
* References to strings as they become resolved following interpreter semantics. All strings
* are interned.
*/
String[] strings;
/** Holds C pointer to dexFile. */
private int dexFile;
// Only created by the VM.
private DexCache() {}
Dex getDex() {
Dex result = dex;
if (result == null) {
synchronized (this) {
result = dex;
if (result == null) {
dex = result = getDexNative();
}
}
}
return result;
}
private native Dex getDexNative();
}
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