1987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe/* 2987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * Copyright (C) 2014 The Android Open Source Project 3987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * 4987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * Licensed under the Apache License, Version 2.0 (the "License"); 5987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * you may not use this file except in compliance with the License. 6987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * You may obtain a copy of the License at 7987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * 8987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * http://www.apache.org/licenses/LICENSE-2.0 9987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * 10987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * Unless required by applicable law or agreed to in writing, software 11987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * distributed under the License is distributed on an "AS IS" BASIS, 12987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * See the License for the specific language governing permissions and 14987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe * limitations under the License. 15987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe */ 16987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 17987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe#ifndef CORE_JNI_HELPERS 18987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe#define CORE_JNI_HELPERS 19987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 20987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe#include "JNIHelp.h" 21987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe#include <android_runtime/AndroidRuntime.h> 22987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 23987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampenamespace android { 24987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 25987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe// Defines some helpful functions. 26987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 27987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline jclass FindClassOrDie(JNIEnv* env, const char* class_name) { 28987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jclass clazz = env->FindClass(class_name); 29987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(clazz == NULL, "Unable to find class %s", class_name); 30987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return clazz; 31987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 32987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 33987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline jfieldID GetFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name, 34987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe const char* field_signature) { 35987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jfieldID res = env->GetFieldID(clazz, field_name, field_signature); 36987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name); 37987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return res; 38987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 39987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 40987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline jmethodID GetMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name, 41987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe const char* method_signature) { 42987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jmethodID res = env->GetMethodID(clazz, method_name, method_signature); 43987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find method %s", method_name); 44987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return res; 45987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 46987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 47987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline jfieldID GetStaticFieldIDOrDie(JNIEnv* env, jclass clazz, const char* field_name, 48987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe const char* field_signature) { 49987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jfieldID res = env->GetStaticFieldID(clazz, field_name, field_signature); 50987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static field %s", field_name); 51987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return res; 52987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 53987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 54987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline jmethodID GetStaticMethodIDOrDie(JNIEnv* env, jclass clazz, const char* method_name, 55987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe const char* method_signature) { 56987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jmethodID res = env->GetStaticMethodID(clazz, method_name, method_signature); 57987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to find static method %s", method_name); 58987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return res; 59987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 60987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 61987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampetemplate <typename T> 62987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline T MakeGlobalRefOrDie(JNIEnv* env, T in) { 63987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe jobject res = env->NewGlobalRef(in); 64987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res == NULL, "Unable to create global reference."); 65987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return static_cast<T>(res); 66987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 67987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 68987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampestatic inline int RegisterMethodsOrDie(JNIEnv* env, const char* className, 69987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe const JNINativeMethod* gMethods, int numMethods) { 70987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe int res = AndroidRuntime::registerNativeMethods(env, className, gMethods, numMethods); 71987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe LOG_ALWAYS_FATAL_IF(res < 0, "Unable to register native methods."); 72987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe return res; 73987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} 74987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 75987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe} // namespace android 76987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe 77987f79f60bb1f0a4bcd3ef22e57301c743f0b94fAndreas Gampe#endif // CORE_JNI_HELPERS 78