如何固定Java中的字节数组? [英] How can I pin a byte array in Java?

问题描述

是否有一种方法可以固定Java中的字节数组，从而使其永远不会移动/压缩?

Is there a way to pin a byte array in java, so it never gets moved/compacted?

我正在开发一个应用程序，该应用程序打算在运行时具有零个GC，并且我想使用固定到内存映射区域的原始字节数组.有什么方法可以做到这一点或破解我的方法吗?

I am working on an application which is intended to have zero GCs during runtime, and I want to use primitive byte arrays that are pinned to a memory mapped area. Is there any way to do this or hack my way to it?

推荐答案

您可以使用ByteBuffer/allocateDirect()这将创建一个字节缓冲区，该缓冲区位于"c"空间中，并且不使用堆，因此不会可以移动并可以有效地用于JNI调用.

You can use a ByteBuffer/allocateDirect() This creates a byte buffer which is in the "c" space and doesn't use heap so it won't get moved and can be use efficiently with JNI calls.

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