#include <iostream>
#include "event.h"

///////////////////////////////////////////////////////////////////////////////

struct socket {
public:
    event<socket&, int>::collector_type& on_some_event()
    {
        return m_some_event.on_signal();
    }

    void some_func_that_signals_event()
    {
        m_some_event(*this, 1337);
    }

private:
    event<socket&, int> m_some_event;
};

///////////////////////////////////////////////////////////////////////////////

void my_free_handler(socket &sender, int param)
{
    std::cout << "my_free_handler(" << &sender << ", " << param << ")" << std::endl;

    // detach after handle from event
    sender.on_some_event() -= my_free_handler;
}

struct my_handler
{
    void handle(socket &sender, int param)
    {
        std::cout << "my_handler::handle(" << &sender << ", " << param << ")" << std::endl;
        m_event_counter++;

        if (m_event_counter == 2)
            sender.on_some_event() -= mem_fn(this, &my_handler::handle);
    }

private:
    int m_event_counter = 0;
};

///////////////////////////////////////////////////////////////////////////////

int main()
{
    socket sock;

    // Add a free handler function
    sock.on_some_event() += my_free_handler;

    // Add an object member method as an handler
    my_handler handler;
    sock.on_some_event() += mem_fn(&handler, &my_handler::handle);

    // Do something to signal the event
    sock.some_func_that_signals_event();
    // ... and again
    sock.some_func_that_signals_event();
    sock.some_func_that_signals_event();
    sock.some_func_that_signals_event();

    return 0;
}