runtime/native/native_util.h

/*
 * Copyright (C) 2017 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.
 */

#ifndef ART_RUNTIME_NATIVE_NATIVE_UTIL_H_
#define ART_RUNTIME_NATIVE_NATIVE_UTIL_H_

#include <jni.h>

#include "android-base/logging.h"
#include "base/macros.h"
#include "nativehelper/scoped_local_ref.h"

namespace art HIDDEN {

ALWAYS_INLINE inline void RegisterNativeMethodsInternal(JNIEnv* env,
                                                        const char* jni_class_name,
                                                        const JNINativeMethod* methods,
                                                        jint method_count) {
  ScopedLocalRef<jclass> c(env, env->FindClass(jni_class_name));
  if (c.get() == nullptr) {
    LOG(FATAL) << "Couldn't find class: " << jni_class_name;
  }
  jint jni_result = env->RegisterNatives(c.get(), methods, method_count);
  CHECK_EQ(JNI_OK, jni_result);
}

#define REGISTER_NATIVE_METHODS(jni_class_name) \
  RegisterNativeMethodsInternal(env, (jni_class_name), gMethods, arraysize(gMethods))

}  // namespace art

#endif  // ART_RUNTIME_NATIVE_NATIVE_UTIL_H_