Catching signals: Use a member function as signal handler

Question

I have an object which does some work in an endless loop. The main() instantiates the object and calls the run() method. Since I don\'t want to use thr

Answer 1

• What do I need to change to make this work? I think f is like void f(int), like the functions the signal handler gets in some examples.

The compiler complains about the type, therefore you need to pass a function pointer, not an object of type boost::function. Creating a global variable of this type, and adding a function which calls this object would work :

boost::function myCb;
void CallCb( int value )
{
  myCb(value);
}

int main(int argc, char** argv)
{
    Foo foo;
    struct sigaction sigIntHandler;

    myCb = std::bind1st(
      std::mem_fun(&Foo::catch_signal), &foo);
    f(5);  // this call works

    sigIntHandler.sa_handler = CallCb;
    sigemptyset(&sigIntHandler.sa_mask);
    sigIntHandler.sa_flags = 0;
    sigaction(SIGTERM, &sigIntHandler, NULL);
    s.run();

}

• Do you have any advice how to solve this kind of thing better?

Not really. The idea is ok. I would just just c++11 lambda instead