我需要别针吗? [英] Do I need to pin?

问题描述

我拥有不受控制的功能:

I have unmanaged funciton:

int  fu1(char ** buf);

int fu1(char** buf);

我在C#中使用以下代码:

I use following in C#:

static extern int fu1(ref IntPtr buf);

static extern int fu1(ref IntPtr buf);

我这样称呼它:

byte [] mBuf;
IntPtr temp = IntPtr();
int size = fu1(ref temp);
mDuf =新的byte [size];
元帅. Copy(temp，mBuf，0，size);

这很好用，但问题是-我需要固定温度吗?

byte[] mBuf;
IntPtr temp = IntPtr();
int size = fu1(ref temp);
mDuf = new byte[size];
Marshal.Copy(temp, mBuf, 0, size);

This works fine, but the question is - do I need to pin temp?

推荐答案

否 由于temp是一个IntPtr，因此您只是传递了一个内存地址，该地址(大概)是由非托管代码设置的.

No.  Since temp is an IntPtr, you're just passing around a memory address, which is (presumably) being set by unmanaged code.

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