measure.hpp

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// MIT License
//
// Copyright (c) 2020, The Regents of the University of California,
// through Lawrence Berkeley National Laboratory (subject to receipt of any
// required approvals from the U.S. Dept. of Energy).  All rights reserved.
//
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// of this software and associated documentation files (the "Software"), to deal
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/**
 * \file timemory/operations/types/measure.hpp
 * \brief Definition for various functions for measure in operations
 */
 
#pragma once
 
#include "timemory/operations/declaration.hpp"
#include "timemory/operations/macros.hpp"
#include "timemory/operations/types.hpp"
 
namespace tim
{
namespace operation
{
//
//--------------------------------------------------------------------------------------//
//
///
/// \struct tim::operation::measure
/// \brief This operation class is used for a single measurement for a component
///
//
//--------------------------------------------------------------------------------------//
//
template <typename Tp>
struct measure
{
    using type = Tp;
 
    TIMEMORY_DELETED_OBJECT(measure)
 
    template <typename... Args>
    explicit measure(type& obj, Args&&... args);
 
private:
    //  satisfies mpl condition and accepts arguments
    template <typename Up, typename... Args>
    auto sfinae(Up& obj, int, int, Args&&... args)
        -> decltype(obj.measure(std::forward<Args>(args)...), void())
    {
        init_storage<Tp>::init();
        obj.measure(std::forward<Args>(args)...);
    }
 
    //  satisfies mpl condition but does not accept arguments
    template <typename Up, typename... Args>
    auto sfinae(Up& obj, int, long, Args&&...) -> decltype(obj.measure(), void())
    {
        init_storage<Tp>::init();
        obj.measure();
    }
 
    //  no member function or does not satisfy mpl condition
    template <typename Up, typename... Args>
    void sfinae(Up&, long, long, Args&&...)
    {
        SFINAE_WARNING(type);
    }
};
//
//--------------------------------------------------------------------------------------//
//
template <typename Tp>
template <typename... Args>
measure<Tp>::measure(type& obj, Args&&... args)
{
    sfinae(obj, 0, 0, std::forward<Args>(args)...);
}
//
//--------------------------------------------------------------------------------------//
//
}  // namespace operation
}  // namespace tim