Action callback

Action.hpp

#ifndef ACTION_HPP
#define ACTION_HPP

template<class T> struct Action
{
    void (*callback)(T*);
    T* data;
};

template<class T> void SafeCall(Action<T> action)
{
    if (action.callback) action.callback(action.data);
}

template<class TData, class TValue> struct ValueAction
{
    void (*callback)(TData*, TValue);
    TData* data;
};

template<class TData, class TValue> void SafeCall(
    ValueAction<TData, TValue> action, TValue value)
{
    if (action.callback) action.callback(action.data, value);
}

#endif