Java应用程序通过JNI调用C++ DLL; 如何最好地分配内存？

extern "C" __declspec(dllexport) void* allocateMemory(size_t size) {
    return malloc(size);
}

public class MemoryAllocator {
    public native long allocateMemory(long size);
}

public class MemoryAllocator {
    static {
        System.loadLibrary("MemoryAllocator");
    }

    public native long allocateMemory(long size);
}

MemoryAllocator allocator = new MemoryAllocator();
long memorySize = 1024; // 要分配的内存大小，单位为字节
long allocatedMemory = allocator.allocateMemory(memorySize);

extern "C" __declspec(dllexport) void freeMemory(void* ptr) {
    free(ptr);
}

public class MemoryAllocator {
    static {
        System.loadLibrary("MemoryAllocator");
    }

    public native long allocateMemory(long size);

    public native void freeMemory(long ptr);
}

MemoryAllocator allocator = new MemoryAllocator();
long memorySize = 1024; // 要分配的内存大小，单位为字节
long allocatedMemory = allocator.allocateMemory(memorySize);

// 使用内存...

allocator.freeMemory(allocatedMemory);