我可以将属性添加到一个函数prevent再入？ [英] Can I add an attribute to a function to prevent reentry?

问题描述

目前，我有一些功能，这是这样的：

At the moment, I have some functions which look like this:

private bool inFunction1 = false;
public void function1()
{
    if (inFunction1) return;
    inFunction1 = true;

    // do stuff which might cause function1 to get called
    ...

    inFunction1 = false;
}

我想能够声明他们是这样的：

I'd like to be able to declare them like this:

[NoReEntry]
public void function1()
{
    // do stuff which might cause function1 to get called
    ...
}

有没有我可以添加到一个函数prevent再入属性？如果没有，我怎么会去制作一个？我听说过AOP属性可以使用之前和之后函数调用来增加code;他们将是合适的？

Is there an attribute I can add to a function to prevent reentry? If not, how would I go about making one? I've heard about AOP attributes that can be used to add code before and after function calls; would they be suitable?

推荐答案

，请尝试使用一个漫长而Interlocked类：

Instead of using a bool and setting it directly, try using a long and the Interlocked class:

long m_InFunction=0;

if(Interlocked.CompareExchange(ref m_InFunction,1,0)==0)
{
  // We're not in the function
  try
  {
  }
  finally
  {
    m_InFunction=0;
  }
}
else
{
  // We're already in the function
}

这将使支票线程安全的。

This will make the check thread safe.

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