44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
// Copyright 2014 Renato Tegon Forti, Antony Polukhin.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_DLL_DETAIL_AGGRESSIVE_PTR_CAST_HPP
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#define BOOST_DLL_DETAIL_AGGRESSIVE_PTR_CAST_HPP
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#include <boost/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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# pragma once
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#endif
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_pointer.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/cstdint.hpp> // boost::uintptr_t
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namespace boost { namespace dll { namespace detail {
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// GCC warns when reinterpret_cast between function pointer and object pointer occur.
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// This method suppress the warnings and ensures that such casts are safe.
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template <class To, class From>
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BOOST_FORCEINLINE To aggressive_ptr_cast(From* v) BOOST_NOEXCEPT {
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BOOST_STATIC_ASSERT_MSG(
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boost::is_pointer<To>::value,
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"`agressive_ptr_cast` function must be used only for pointer casting."
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);
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BOOST_STATIC_ASSERT_MSG(
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sizeof(v) == sizeof(To),
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"Pointer to function and pointer to object differ in size on your platform."
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);
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return reinterpret_cast<To>(
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reinterpret_cast<boost::uintptr_t>(v)
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);
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}
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}}} // boost::dll::detail
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#endif // BOOST_DLL_DETAIL_AGGRESSIVE_PTR_CAST_HPP
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