// 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.

#include "util/jni_native_method.h"

#include <cstdlib>

#include <vector>

#include "jni.h"

#include "util/defer_op.h"

namespace doris {

jlong JavaNativeMethods::memoryMalloc(JNIEnv* env, jclass clazz, jlong bytes) {

    return reinterpret_cast<long>(malloc(bytes));

}

void JavaNativeMethods::memoryFree(JNIEnv* env, jclass clazz, jlong address) {

    free(reinterpret_cast<void*>(address));

}

jlongArray JavaNativeMethods::memoryMallocBatch(JNIEnv* env, jclass clazz, jintArray sizes) {

    DCHECK(sizes != nullptr);

    jsize n = env->GetArrayLength(sizes);

    DCHECK(n > 0);

    jint* elems = env->GetIntArrayElements(sizes, nullptr);

    if (elems == nullptr) {

        return nullptr;

    }

    DEFER({

        if (elems != nullptr) {

            env->ReleaseIntArrayElements(sizes, elems, JNI_ABORT);

        }

    });

    jlongArray result = env->NewLongArray(n);

    if (result == nullptr) {

        return nullptr;

    }

    std::vector<void*> allocated;

    allocated.reserve(n);

    // sizes are validated on Java side: n > 0 and each size > 0

    bool failed = false;

    for (jsize i = 0; i < n; ++i) {

        auto sz = static_cast<size_t>(elems[i]);

        void* p = malloc(sz);

        if (p == nullptr) {

            failed = true;

            break;

        }

        allocated.push_back(p);

    }

    if (failed) {

        for (void* p : allocated) {

            if (p != nullptr) {

                free(p);

            }

        }

        return nullptr;

    }

    std::vector<jlong> addrs(n);

    for (jsize i = 0; i < n; ++i) {

        addrs[i] = reinterpret_cast<jlong>(allocated[i]);

    }

    env->SetLongArrayRegion(result, 0, n, addrs.data());

    return result;

}

void JavaNativeMethods::memoryFreeBatch(JNIEnv* env, jclass clazz, jlongArray addrs) {

    if (addrs == nullptr) {

        return;

    }

    jsize n = env->GetArrayLength(addrs);

    if (n <= 0) {

        return;

    }

    jlong* elems = env->GetLongArrayElements(addrs, nullptr);

    if (elems == nullptr) {

        return;

    }

    for (jsize i = 0; i < n; ++i) {

        if (elems[i] != 0) {

            free(reinterpret_cast<void*>(elems[i]));

        }

    }

    env->ReleaseLongArrayElements(addrs, elems, JNI_ABORT);

}

} // namespace doris