使用std :: bind和boost :: signals2是否安全？

#include <boost/signals2.hpp>
#include <iostream>
#include <vector>

class MyClass {
public:
    void start() {
        std::cout << "Starting the signal handler." << std::endl;
        signal_handler_();
    }

    void stop() {
        std::cout << "Stopping the signal handler." << std::endl;
        signal_handler_ = nullptr;
    }

private:
    void signal_handler_() {
        std::cout << "Processing the signal." << std::endl;
    }

    boost::signals2::signal<void()> signal_handler_;
};

int main() {
    MyClass my_class;

    // Bind a function to the signal
    my_class.signal_handler_.connect<void>(boost::bind(&MyClass::signal_handler_, &my_class));

    // Start the signal handler
    my_class.start();

    // Stop the signal handler
    my_class.stop();

    return 0;
}