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upload android base code part6

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August 2018-08-08 17:48:24 +08:00
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android/libnativehelper/JniConstants.cpp Normal file
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/*
* Copyright (C) 2010 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.
*/
#define LOG_TAG "JniConstants"
#include "ALog-priv.h"
#include "JniConstants.h"
#include "ScopedLocalRef.h"
#include <stdlib.h>
#include <atomic>
#include <mutex>
static std::atomic<bool> g_constants_initialized(false);
static std::mutex g_constants_mutex;
jclass JniConstants::booleanClass;
jclass JniConstants::byteArrayClass;
jclass JniConstants::calendarClass;
jclass JniConstants::charsetICUClass;
jclass JniConstants::doubleClass;
jclass JniConstants::errnoExceptionClass;
jclass JniConstants::fileDescriptorClass;
jclass JniConstants::gaiExceptionClass;
jclass JniConstants::inet6AddressClass;
jclass JniConstants::inet6AddressHolderClass;
jclass JniConstants::inetAddressClass;
jclass JniConstants::inetAddressHolderClass;
jclass JniConstants::inetSocketAddressClass;
jclass JniConstants::inetSocketAddressHolderClass;
jclass JniConstants::integerClass;
jclass JniConstants::localeDataClass;
jclass JniConstants::longClass;
jclass JniConstants::mutableIntClass;
jclass JniConstants::mutableLongClass;
jclass JniConstants::netlinkSocketAddressClass;
jclass JniConstants::packetSocketAddressClass;
jclass JniConstants::patternSyntaxExceptionClass;
jclass JniConstants::referenceClass;
jclass JniConstants::socketTaggerClass;
jclass JniConstants::stringClass;
jclass JniConstants::structAddrinfoClass;
jclass JniConstants::structFlockClass;
jclass JniConstants::structGroupReqClass;
jclass JniConstants::structGroupSourceReqClass;
jclass JniConstants::structIfaddrs;
jclass JniConstants::structLingerClass;
jclass JniConstants::structPasswdClass;
jclass JniConstants::structPollfdClass;
jclass JniConstants::structStatClass;
jclass JniConstants::structStatVfsClass;
jclass JniConstants::structTimevalClass;
jclass JniConstants::structTimespecClass;
jclass JniConstants::structUcredClass;
jclass JniConstants::structUtsnameClass;
jclass JniConstants::unixSocketAddressClass;
jclass JniConstants::zipEntryClass;
static jclass findClass(JNIEnv* env, const char* name) {
ScopedLocalRef<jclass> localClass(env, env->FindClass(name));
jclass result = reinterpret_cast<jclass>(env->NewGlobalRef(localClass.get()));
if (result == NULL) {
ALOGE("failed to find class '%s'", name);
abort();
}
return result;
}
void JniConstants::init(JNIEnv* env) {
// Fast check
if (g_constants_initialized) {
// already initialized
return;
}
// Slightly slower check
std::lock_guard<std::mutex> guard(g_constants_mutex);
if (g_constants_initialized) {
// already initialized
return;
}
booleanClass = findClass(env, "java/lang/Boolean");
byteArrayClass = findClass(env, "[B");
calendarClass = findClass(env, "java/util/Calendar");
charsetICUClass = findClass(env, "java/nio/charset/CharsetICU");
doubleClass = findClass(env, "java/lang/Double");
errnoExceptionClass = findClass(env, "android/system/ErrnoException");
fileDescriptorClass = findClass(env, "java/io/FileDescriptor");
gaiExceptionClass = findClass(env, "android/system/GaiException");
inet6AddressClass = findClass(env, "java/net/Inet6Address");
inet6AddressHolderClass = findClass(env, "java/net/Inet6Address$Inet6AddressHolder");
inetAddressClass = findClass(env, "java/net/InetAddress");
inetAddressHolderClass = findClass(env, "java/net/InetAddress$InetAddressHolder");
inetSocketAddressClass = findClass(env, "java/net/InetSocketAddress");
inetSocketAddressHolderClass = findClass(env, "java/net/InetSocketAddress$InetSocketAddressHolder");
integerClass = findClass(env, "java/lang/Integer");
localeDataClass = findClass(env, "libcore/icu/LocaleData");
longClass = findClass(env, "java/lang/Long");
mutableIntClass = findClass(env, "android/util/MutableInt");
mutableLongClass = findClass(env, "android/util/MutableLong");
netlinkSocketAddressClass = findClass(env, "android/system/NetlinkSocketAddress");
packetSocketAddressClass = findClass(env, "android/system/PacketSocketAddress");
patternSyntaxExceptionClass = findClass(env, "java/util/regex/PatternSyntaxException");
referenceClass = findClass(env, "java/lang/ref/Reference");
socketTaggerClass = findClass(env, "dalvik/system/SocketTagger");
stringClass = findClass(env, "java/lang/String");
structAddrinfoClass = findClass(env, "android/system/StructAddrinfo");
structFlockClass = findClass(env, "android/system/StructFlock");
structGroupReqClass = findClass(env, "android/system/StructGroupReq");
structGroupSourceReqClass = findClass(env, "android/system/StructGroupSourceReq");
structIfaddrs = findClass(env, "android/system/StructIfaddrs");
structLingerClass = findClass(env, "android/system/StructLinger");
structPasswdClass = findClass(env, "android/system/StructPasswd");
structPollfdClass = findClass(env, "android/system/StructPollfd");
structStatClass = findClass(env, "android/system/StructStat");
structStatVfsClass = findClass(env, "android/system/StructStatVfs");
structTimevalClass = findClass(env, "android/system/StructTimeval");
structTimespecClass = findClass(env, "android/system/StructTimespec");
structUcredClass = findClass(env, "android/system/StructUcred");
structUtsnameClass = findClass(env, "android/system/StructUtsname");
unixSocketAddressClass = findClass(env, "android/system/UnixSocketAddress");
zipEntryClass = findClass(env, "java/util/zip/ZipEntry");
g_constants_initialized = true;
}