cpp-ch/local-engine/Common/JNIUtils.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
#pragma once
#include <jni.h>

namespace local_engine
{
class JNIUtils
{
public:
    inline static JavaVM * vm = nullptr;

    static JNIEnv * getENV(int * attach);

    static void detachCurrentThread();
};

#define GET_JNIENV(env) \
    int attached; \
    JNIEnv *(env) = JNIUtils::getENV(&attached);

#define CLEAN_JNIENV \
    if (attached) [[unlikely]] \
    { \
        JNIUtils::detachCurrentThread(); \
    }

}