How to access class member and methods from static method(signal handler)

[Hitup]

I have one problem. I am writting my program on C++ language. I have one promblem. I need to set signal handler for my process. As the signal is related with the process on system level I have faced the problem.
My programm consists several classes. They are connected together. But it doesn't metter in this case.
The problem is that I need to access to member and methods of the class from my signal handler. For instance , I have class named Foo at it has some members and methods.
So from my handler I need to call its function and change members.
I understand that compiler should know that this class instances will exist during all program execution.
I have tried to set static member class Foo instance in another class , but this didn't solve the problem.
I have no ideas what is correct approach to do this. Please explain how to correctly implement signal handling in such case.
Thansks.




Here is example of my code

 class MyContainer
{
private:
std::vector<Foo> container;
public:
int removeFromContainer(Foo* aFoo) { 
// DO some stuff 
return RESULT_CODE;
}
int addToContainer(Foo* aFoo) { 
// DO some stuff 
return RESULT_CODE;
}
};

Here is my Main class

class MainClass
    {
    private:
        int member;
    public:
        void mainLoop(char* args) { 
          signal(SIGCHLD, &signalHandler);
     }
    };

Here is my function for signal handling

void static signalHandler_child(int p)
          {
               this->myContainerInstance->addToContainer(new Foo);
                
          }

[grumpy]

Awww. Come on.

It's obvious all you're doing is making wild guesses (people who know what you're asking for can recognise the signs) based on some code in a language other than C++. All you've done is supply three disconnected pieces of code.

You need to demonstrate genuine effort before you can expect help.

Also, static member functions of classes NEVER receive a "this" pointer.

There is no such thing as a main class in C++ (that is a hangover from the other programming language the code you nabbed was written in).

[Elysia]

Since static methods belong to "all" instances or none, they cannot have a "this" pointer. Which instance would "this" belong to?

[Hitup]

Since static methods belong to "all" instances or none, they cannot have a "this" pointer. Which instance would "this" belong to?

Please provide correct way of implementing this.

[Elkvis]

Use a combination of static members/data and std::bind.