C＃内存地址和变量 [英] C# memory address and variable

问题描述

在C＃中，有没有办法

1. 获取存储在内存地址 引用类型变量？
2. 获取的内存地址 变量？

1. Get the memory address stored in a reference type variable?
2. Get the memory address of a variable?

编辑：

int i;
int* pi = &i;

• 如何打印出圆周率？的十六进制值

推荐答案

有关＃2，＆安培; 运营商将会以相同的方式工作，成为C.如果变量不是在堆栈上，您可能需要使用固定语句针下来，而你工作这么垃圾回收器不动它，虽然。

For #2, the & operator will work in the same fashion as in C. If the variable is not on the stack, you may need to use a fixed statement to pin it down while you work so the garbage collector does not move it, though.

有关＃1，引用类型是棘手：您需要使用的GCHandle ，而引用类型必须是blittable，即有一个明确的内存布局和按位拷贝的。

For #1, reference types are trickier: you'll need to use a GCHandle, and the reference type has to be blittable, i.e. have a defined memory layout and be bitwise copyable.

为了访问地址为数字，你可以从指针类型强制转换为的IntPtr （定义为相同的大小为指针的整数类型），和从那里到 UINT 或 ULONG （取决于基础计算机的指针大小）。

In order to access the address as a number, you can cast from pointer type to IntPtr (an integer type defined to be the same size as a pointer), and from there to uint or ulong (depending on the pointer size of the underlying machine).

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential)]
class Blittable
{
    int x;
}

class Program
{
    public static unsafe void Main()
    {
        int i;
        object o = new Blittable();
        int* ptr = &i;
        IntPtr addr = (IntPtr)ptr;

        Console.WriteLine(addr.ToString("x"));

        GCHandle h = GCHandle.Alloc(o, GCHandleType.Pinned);
        addr = h.AddrOfPinnedObject();
        Console.WriteLine(addr.ToString("x"));

        h.Free();
    }
}

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