Signal handling in C++ (using instance variable inside method)

Question

I'm not very skilled in C++, so I find this tricky.

I have a class which looks pretty similar to this one : Is it possible to use signal inside a C++ class?., but inside the signal handling method I have to work with an instance variable.

The first thing I tried was to set the variable static, but it didn't help. What should i do? Thanks Hynek

Could you post what you've done so far?

jrd1
– jrd1

2012-10-11 20:30:53 +00:00
Commented Oct 11, 2012 at 20:30 — jrd1
– jrd1, Commented Oct 11, 2012 at 20:30

Brady · Accepted Answer · 2012-10-11 20:43:33Z

1

If you want to work with an instance variable, then you'll need a class instance, since you cant access instance variables from a static method. Your next question will be how to get the class instance, for which there are a few options. You can either make a global variable, which is usually frowned upon, or you could consider making a Singleton. The approach used in option 2 of the accepted answer to the question you referenced is similar to a singleton, so that could also be an option.

Perhaps this would be clearer if you reviewed static methods and attributes. Bruce Eckel's Thinking in C++ is an excellent free online c++ book that should help.

edited Oct 11, 2012 at 20:43

answered Oct 11, 2012 at 20:34

Brady

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