Handle a signal and give it to anything

sig_handler.cpp

#include <csignal>
#include <iostream>
#include <thread>
 
namespace
{
	volatile std::sig_atomic_t gSignalStatus = 0;
}

class Foo
{
	public:
	void run(volatile std::sig_atomic_t& sig_status)
	{
		std::cout << "Start Foo::run\n";
		while(sig_status == 0)
		{
		        continue;	
            	}
            	std::cout << "Stop Foo::run\n";
	}
};
 
void signal_handler(int signal)
{
	std::cout << "Signal : " << signal << '\n';
	gSignalStatus = signal;
}
 
int main()
{
	// Install a signal handler
	std::signal(SIGINT, signal_handler);

	std::cout << "Signal at " << gSignalStatus << '\n';

	Foo f;
	f.run(gSignalStatus);
	
	std::cout << "Shutting down\n";
	return 0;
}