ofEvent.h

#pragma once

#include <vector>
#include <functional>
#include <mutex>
#include <thread>

template<typename T>
class ofEvent{
public:
    template<class TObj>
    void add(TObj * listener, void (TObj::*method)(T&)){
        std::unique_lock<std::mutex> lck(mtx);
        functions.push_back(std::bind(method,listener));
    }

    template<class TObj>
    void remove(TObj * listener, void (TObj::*method)(T&)){
        std::unique_lock<std::mutex> lck(mtx);
        for(size_t i=0; i<functions.size(); i++){
            if(functions[i].target<void (TObj::*)(T&)>()==method){
                functions.erase(functions.begin() + i);
            }
        }
    }

    void notify(T & param){
        std::unique_lock<std::mutex> lck(mtx);
        for(auto & f: functions){
            f(param);
        }
    }

private:
    std::mutex mtx;
    std::vector<std::function<void(T&)>> functions;
};