1 /* 2 * Copyright (C) 2010 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 #define LOG_TAG "JniConstants" 18 19 #include "ALog-priv.h" 20 #include "JniConstants.h" 21 #include "ScopedLocalRef.h" 22 23 #include <stdlib.h> 24 25 #include <atomic> 26 #include <mutex> 27 28 static std::atomic<bool> g_constants_initialized(false); 29 static std::mutex g_constants_mutex; 30 31 jclass JniConstants::bigDecimalClass; 32 jclass JniConstants::booleanClass; 33 jclass JniConstants::byteArrayClass; 34 jclass JniConstants::byteClass; 35 jclass JniConstants::calendarClass; 36 jclass JniConstants::characterClass; 37 jclass JniConstants::charsetICUClass; 38 jclass JniConstants::constructorClass; 39 jclass JniConstants::deflaterClass; 40 jclass JniConstants::doubleClass; 41 jclass JniConstants::errnoExceptionClass; 42 jclass JniConstants::fieldClass; 43 jclass JniConstants::fileDescriptorClass; 44 jclass JniConstants::floatClass; 45 jclass JniConstants::gaiExceptionClass; 46 jclass JniConstants::inet6AddressClass; 47 jclass JniConstants::inetAddressClass; 48 jclass JniConstants::inetAddressHolderClass; 49 jclass JniConstants::inetSocketAddressClass; 50 jclass JniConstants::inetSocketAddressHolderClass; 51 jclass JniConstants::inflaterClass; 52 jclass JniConstants::inputStreamClass; 53 jclass JniConstants::integerClass; 54 jclass JniConstants::localeDataClass; 55 jclass JniConstants::longClass; 56 jclass JniConstants::methodClass; 57 jclass JniConstants::mutableIntClass; 58 jclass JniConstants::mutableLongClass; 59 jclass JniConstants::netlinkSocketAddressClass; 60 jclass JniConstants::objectClass; 61 jclass JniConstants::objectArrayClass; 62 jclass JniConstants::outputStreamClass; 63 jclass JniConstants::packetSocketAddressClass; 64 jclass JniConstants::parsePositionClass; 65 jclass JniConstants::patternSyntaxExceptionClass; 66 jclass JniConstants::referenceClass; 67 jclass JniConstants::shortClass; 68 jclass JniConstants::socketClass; 69 jclass JniConstants::socketImplClass; 70 jclass JniConstants::socketTaggerClass; 71 jclass JniConstants::stringClass; 72 jclass JniConstants::structAddrinfoClass; 73 jclass JniConstants::structFlockClass; 74 jclass JniConstants::structGroupReqClass; 75 jclass JniConstants::structGroupSourceReqClass; 76 jclass JniConstants::structLingerClass; 77 jclass JniConstants::structPasswdClass; 78 jclass JniConstants::structPollfdClass; 79 jclass JniConstants::structStatClass; 80 jclass JniConstants::structStatVfsClass; 81 jclass JniConstants::structTimevalClass; 82 jclass JniConstants::structUcredClass; 83 jclass JniConstants::structUtsnameClass; 84 jclass JniConstants::unixSocketAddressClass; 85 jclass JniConstants::zipEntryClass; 86 87 static jclass findClass(JNIEnv* env, const char* name) { 88 ScopedLocalRef<jclass> localClass(env, env->FindClass(name)); 89 jclass result = reinterpret_cast<jclass>(env->NewGlobalRef(localClass.get())); 90 if (result == NULL) { 91 ALOGE("failed to find class '%s'", name); 92 abort(); 93 } 94 return result; 95 } 96 97 void JniConstants::init(JNIEnv* env) { 98 // Fast check 99 if (g_constants_initialized) { 100 // already initialized 101 return; 102 } 103 104 // Slightly slower check 105 std::lock_guard<std::mutex> guard(g_constants_mutex); 106 if (g_constants_initialized) { 107 // already initialized 108 return; 109 } 110 111 bigDecimalClass = findClass(env, "java/math/BigDecimal"); 112 booleanClass = findClass(env, "java/lang/Boolean"); 113 byteClass = findClass(env, "java/lang/Byte"); 114 byteArrayClass = findClass(env, "[B"); 115 calendarClass = findClass(env, "java/util/Calendar"); 116 characterClass = findClass(env, "java/lang/Character"); 117 charsetICUClass = findClass(env, "java/nio/charset/CharsetICU"); 118 constructorClass = findClass(env, "java/lang/reflect/Constructor"); 119 floatClass = findClass(env, "java/lang/Float"); 120 deflaterClass = findClass(env, "java/util/zip/Deflater"); 121 doubleClass = findClass(env, "java/lang/Double"); 122 errnoExceptionClass = findClass(env, "android/system/ErrnoException"); 123 fieldClass = findClass(env, "java/lang/reflect/Field"); 124 fileDescriptorClass = findClass(env, "java/io/FileDescriptor"); 125 gaiExceptionClass = findClass(env, "android/system/GaiException"); 126 inet6AddressClass = findClass(env, "java/net/Inet6Address"); 127 inetAddressClass = findClass(env, "java/net/InetAddress"); 128 inetAddressHolderClass = findClass(env, "java/net/InetAddress$InetAddressHolder"); 129 inetSocketAddressClass = findClass(env, "java/net/InetSocketAddress"); 130 inetSocketAddressHolderClass = findClass(env, "java/net/InetSocketAddress$InetSocketAddressHolder"); 131 inflaterClass = findClass(env, "java/util/zip/Inflater"); 132 inputStreamClass = findClass(env, "java/io/InputStream"); 133 integerClass = findClass(env, "java/lang/Integer"); 134 localeDataClass = findClass(env, "libcore/icu/LocaleData"); 135 longClass = findClass(env, "java/lang/Long"); 136 methodClass = findClass(env, "java/lang/reflect/Method"); 137 mutableIntClass = findClass(env, "android/util/MutableInt"); 138 mutableLongClass = findClass(env, "android/util/MutableLong"); 139 netlinkSocketAddressClass = findClass(env, "android/system/NetlinkSocketAddress"); 140 objectClass = findClass(env, "java/lang/Object"); 141 objectArrayClass = findClass(env, "[Ljava/lang/Object;"); 142 outputStreamClass = findClass(env, "java/io/OutputStream"); 143 packetSocketAddressClass = findClass(env, "android/system/PacketSocketAddress"); 144 parsePositionClass = findClass(env, "java/text/ParsePosition"); 145 patternSyntaxExceptionClass = findClass(env, "java/util/regex/PatternSyntaxException"); 146 referenceClass = findClass(env, "java/lang/ref/Reference"); 147 shortClass = findClass(env, "java/lang/Short"); 148 socketClass = findClass(env, "java/net/Socket"); 149 socketTaggerClass = findClass(env, "dalvik/system/SocketTagger"); 150 socketImplClass = findClass(env, "java/net/SocketImpl"); 151 stringClass = findClass(env, "java/lang/String"); 152 structAddrinfoClass = findClass(env, "android/system/StructAddrinfo"); 153 structFlockClass = findClass(env, "android/system/StructFlock"); 154 structGroupReqClass = findClass(env, "android/system/StructGroupReq"); 155 structGroupSourceReqClass = findClass(env, "android/system/StructGroupSourceReq"); 156 structLingerClass = findClass(env, "android/system/StructLinger"); 157 structPasswdClass = findClass(env, "android/system/StructPasswd"); 158 structPollfdClass = findClass(env, "android/system/StructPollfd"); 159 structStatClass = findClass(env, "android/system/StructStat"); 160 structStatVfsClass = findClass(env, "android/system/StructStatVfs"); 161 structTimevalClass = findClass(env, "android/system/StructTimeval"); 162 structUcredClass = findClass(env, "android/system/StructUcred"); 163 structUtsnameClass = findClass(env, "android/system/StructUtsname"); 164 unixSocketAddressClass = findClass(env, "android/system/UnixSocketAddress"); 165 zipEntryClass = findClass(env, "java/util/zip/ZipEntry"); 166 167 g_constants_initialized = true; 168 } 169
