BaseObj.java revision ef353dde086a6833471deff4da58a6eaf8a1ef36
1/* 2 * Copyright (C) 2008 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 android.renderscript; 18 19import android.util.Log; 20 21/** 22 * BaseObj is the base class for interfacing with native renderscript objects. 23 * It primarly contains code for tracking the native object ID and forcably 24 * disconecting the object from the native allocation for early cleanup. 25 * 26 **/ 27public class BaseObj { 28 BaseObj(int id, RenderScript rs) { 29 rs.validate(); 30 mRS = rs; 31 mID = id; 32 mDestroyed = false; 33 } 34 35 void setID(int id) { 36 if (mID != 0) { 37 throw new RSRuntimeException("Internal Error, reset of object ID."); 38 } 39 mID = id; 40 } 41 42 /** 43 * Lookup the native object ID for this object. Primarily used by the 44 * generated reflected code. 45 * 46 * 47 * @return int 48 */ 49 int getID() { 50 if (mDestroyed) { 51 throw new RSInvalidStateException("using a destroyed object."); 52 } 53 if (mID == 0) { 54 throw new RSRuntimeException("Internal error: Object id 0."); 55 } 56 return mID; 57 } 58 59 void checkValid() { 60 if (mID == 0) { 61 throw new RSIllegalArgumentException("Invalid object."); 62 } 63 } 64 65 private int mID; 66 private boolean mDestroyed; 67 private String mName; 68 RenderScript mRS; 69 70 /** 71 * setName assigns a name to an object. This object can later be looked up 72 * by this name. This name will also be retained if the object is written 73 * to an A3D file. 74 * 75 * @param name The name to assign to the object. 76 */ 77 public void setName(String name) { 78 if (name == null) { 79 throw new RSIllegalArgumentException( 80 "setName requires a string of non-zero length."); 81 } 82 if(name.length() < 1) { 83 throw new RSIllegalArgumentException( 84 "setName does not accept a zero length string."); 85 } 86 if(mName != null) { 87 throw new RSIllegalArgumentException( 88 "setName object already has a name."); 89 } 90 91 try { 92 byte[] bytes = name.getBytes("UTF-8"); 93 mRS.nAssignName(mID, bytes); 94 mName = name; 95 } catch (java.io.UnsupportedEncodingException e) { 96 throw new RuntimeException(e); 97 } 98 } 99 100 protected void finalize() throws Throwable { 101 if (!mDestroyed) { 102 if(mID != 0 && mRS.isAlive()) { 103 mRS.nObjDestroy(mID); 104 } 105 mRS = null; 106 mID = 0; 107 mDestroyed = true; 108 //Log.v(RenderScript.LOG_TAG, getClass() + 109 // " auto finalizing object without having released the RS reference."); 110 } 111 super.finalize(); 112 } 113 114 /** 115 * destroy disconnects the object from the native object effectively 116 * rendering this java object dead. The primary use is to force immediate 117 * cleanup of resources when it is believed the GC will not respond quickly 118 * enough. 119 */ 120 synchronized public void destroy() { 121 if(mDestroyed) { 122 throw new RSInvalidStateException("Object already destroyed."); 123 } 124 mDestroyed = true; 125 mRS.nObjDestroy(mID); 126 } 127 128 /** 129 * If an object came from an a3d file, java fields need to be 130 * created with objects from the native layer 131 */ 132 void updateFromNative() { 133 mRS.validate(); 134 mName = mRS.nGetName(getID()); 135 } 136 137} 138 139