| /* |
| * Copyright (C) 2008 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 "pmtestdual native.cpp" |
| #include <utils/Log.h> |
| |
| #include <stdio.h> |
| |
| #include "jni.h" |
| |
| static jint |
| add(JNIEnv *env, jobject thiz, jint a, jint b) { |
| int result = a + b; |
| ALOGI("%d + %d = %d", a, b, result); |
| return result; |
| } |
| |
| static const char *classPathName = "com/framework/shareduid/dual/Native"; |
| |
| static const JNINativeMethod methods[] = { |
| {"add", "(II)I", (void*)add }, |
| }; |
| |
| /* |
| * Register several native methods for one class. |
| */ |
| static int registerNativeMethods(JNIEnv* env, const char* className, |
| const JNINativeMethod* gMethods, int numMethods) |
| { |
| jclass clazz; |
| |
| clazz = env->FindClass(className); |
| if (clazz == NULL) { |
| ALOGE("Native registration unable to find class '%s'", className); |
| return JNI_FALSE; |
| } |
| if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) { |
| ALOGE("RegisterNatives failed for '%s'", className); |
| return JNI_FALSE; |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| /* |
| * Register native methods for all classes we know about. |
| * |
| * returns JNI_TRUE on success. |
| */ |
| static int registerNatives(JNIEnv* env) |
| { |
| if (!registerNativeMethods(env, classPathName, |
| methods, sizeof(methods) / sizeof(methods[0]))) { |
| return JNI_FALSE; |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| /* |
| * This is called by the VM when the shared library is first loaded. |
| */ |
| |
| typedef union { |
| JNIEnv* env; |
| void* venv; |
| } UnionJNIEnvToVoid; |
| |
| jint JNI_OnLoad(JavaVM* vm, void* reserved) |
| { |
| UnionJNIEnvToVoid uenv; |
| uenv.venv = NULL; |
| jint result = -1; |
| JNIEnv* env = NULL; |
| |
| ALOGI("JNI_OnLoad"); |
| |
| if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK) { |
| ALOGE("ERROR: GetEnv failed"); |
| goto bail; |
| } |
| env = uenv.env; |
| |
| if (registerNatives(env) != JNI_TRUE) { |
| ALOGE("ERROR: registerNatives failed"); |
| goto bail; |
| } |
| |
| result = JNI_VERSION_1_4; |
| |
| bail: |
| return result; |
| } |