method_binder.hpp

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/*
 * Copyright (C) 2014 Pavel Kirienko <pavel.kirienko@gmail.com>
 */
 
#ifndef UAVCAN_UTIL_METHOD_BINDER_HPP_INCLUDED
#define UAVCAN_UTIL_METHOD_BINDER_HPP_INCLUDED
 
#include <uavcan/error.hpp>
#include <uavcan/build_config.hpp>
#include <uavcan/util/templates.hpp>
 
namespace uavcan
{
template <typename ObjectPtr, typename MemFunPtr>
class UAVCAN_EXPORT MethodBinder
{
    ObjectPtr obj_;
    MemFunPtr fun_;
 
    void validateBeforeCall() const
    {
        if (!operator bool())
        {
            handleFatalError("Null binder");
        }
    }
 
public:
    MethodBinder()
        : obj_()
        , fun_()
    { }
 
    MethodBinder(ObjectPtr o, MemFunPtr f)
        : obj_(o)
        , fun_(f)
    { }
 
    operator bool() const
    {
        return coerceOrFallback<bool>(obj_, true) && coerceOrFallback<bool>(fun_, true);
    }
 
    void operator()()
    {
        validateBeforeCall();
        (obj_->*fun_)();
    }
 
    template <typename Par1>
    void operator()(Par1& p1)
    {
        validateBeforeCall();
        (obj_->*fun_)(p1);
    }
 
    template <typename Par1, typename Par2>
    void operator()(Par1& p1, Par2& p2)
    {
        validateBeforeCall();
        (obj_->*fun_)(p1, p2);
    }
};
 
}
 
#endif // UAVCAN_UTIL_METHOD_BINDER_HPP_INCLUDED