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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\type_traits\type_with_alignment.hpp
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// (C) Copyright John Maddock 2000. // Use, modification and distribution are subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt). // // See http://www.boost.org/libs/type_traits for most recent version including documentation. #ifndef BOOST_TT_TYPE_WITH_ALIGNMENT_INCLUDED #define BOOST_TT_TYPE_WITH_ALIGNMENT_INCLUDED #include
#include
#include
#include
#include
#include
#include
#include
#include
#include
// should be the last #include #include
#include
#ifdef BOOST_MSVC # pragma warning(push) # pragma warning(disable: 4121) // alignment is sensitive to packing #endif namespace boost { #ifndef __BORLANDC__ namespace detail { class alignment_dummy; typedef void (*function_ptr)(); typedef int (alignment_dummy::*member_ptr); typedef int (alignment_dummy::*member_function_ptr)(); #ifdef BOOST_HAS_LONG_LONG #define BOOST_TT_ALIGNMENT_BASE_TYPES BOOST_PP_TUPLE_TO_LIST( \ 12, ( \ char, short, int, long, ::boost::long_long_type, float, double, long double \ , void*, function_ptr, member_ptr, member_function_ptr)) #else #define BOOST_TT_ALIGNMENT_BASE_TYPES BOOST_PP_TUPLE_TO_LIST( \ 11, ( \ char, short, int, long, float, double, long double \ , void*, function_ptr, member_ptr, member_function_ptr)) #endif #define BOOST_TT_HAS_ONE_T(D,Data,T) boost::detail::has_one_T< T > #define BOOST_TT_ALIGNMENT_STRUCT_TYPES \ BOOST_PP_LIST_TRANSFORM(BOOST_TT_HAS_ONE_T, \ X, \ BOOST_TT_ALIGNMENT_BASE_TYPES) #define BOOST_TT_ALIGNMENT_TYPES \ BOOST_PP_LIST_APPEND(BOOST_TT_ALIGNMENT_BASE_TYPES, \ BOOST_TT_ALIGNMENT_STRUCT_TYPES) // // lower_alignment_helper -- // // This template gets instantiated a lot, so use partial // specialization when available to reduce the compiler burden. // #ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION template
struct lower_alignment_helper_impl { template
struct apply { typedef char type; enum { value = true }; }; }; template <> struct lower_alignment_helper_impl
{ template
struct apply : mpl::if_c<(alignment_of
::value == target), TestType, char> { enum { value = (alignment_of
::value == target) }; }; }; template
struct lower_alignment_helper : lower_alignment_helper_impl
::template apply
{ }; #else template
struct lower_alignment_helper { typedef char type; enum { value = true }; }; template
struct lower_alignment_helper
{ enum { value = (alignment_of
::value == target) }; typedef typename mpl::if_c
::type type; }; #endif #define BOOST_TT_CHOOSE_MIN_ALIGNMENT(R,P,I,T) \ typename lower_alignment_helper< \ BOOST_PP_CAT(found,I),target,T \ >::type BOOST_PP_CAT(t,I); \ enum { \ BOOST_PP_CAT(found,BOOST_PP_INC(I)) \ = lower_alignment_helper
::value \ }; #define BOOST_TT_CHOOSE_T(R,P,I,T) T BOOST_PP_CAT(t,I); template
struct has_one_T { T data; }; template
union lower_alignment { enum { found0 = false }; BOOST_PP_LIST_FOR_EACH_I( BOOST_TT_CHOOSE_MIN_ALIGNMENT , ignored , BOOST_TT_ALIGNMENT_TYPES ) }; union max_align { BOOST_PP_LIST_FOR_EACH_I( BOOST_TT_CHOOSE_T , ignored , BOOST_TT_ALIGNMENT_TYPES ) }; #undef BOOST_TT_ALIGNMENT_BASE_TYPES #undef BOOST_TT_HAS_ONE_T #undef BOOST_TT_ALIGNMENT_STRUCT_TYPES #undef BOOST_TT_ALIGNMENT_TYPES #undef BOOST_TT_CHOOSE_MIN_ALIGNMENT #undef BOOST_TT_CHOOSE_T template
struct is_aligned { BOOST_STATIC_CONSTANT(bool, value = (TAlign >= Align) & (TAlign % Align == 0) ); }; #ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::max_align,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<1> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<2> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<4> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<8> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<10> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<16> ,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::detail::lower_alignment<32> ,true) #endif } // namespace detail #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION template
struct is_pod< ::boost::detail::lower_alignment
> { BOOST_STATIC_CONSTANT(std::size_t, value = true); }; #endif // This alignment method originally due to Brian Parker, implemented by David // Abrahams, and then ported here by Doug Gregor. template
class type_with_alignment { typedef ::boost::detail::lower_alignment
t1; typedef typename mpl::if_c< ::boost::detail::is_aligned< ::boost::alignment_of
::value,Align >::value , t1 , ::boost::detail::max_align >::type align_t; BOOST_STATIC_CONSTANT(std::size_t, found = alignment_of
::value); BOOST_STATIC_ASSERT(found >= Align); BOOST_STATIC_ASSERT(found % Align == 0); public: typedef align_t type; }; #if defined(__GNUC__) namespace align { struct __attribute__((__aligned__(2))) a2 {}; struct __attribute__((__aligned__(4))) a4 {}; struct __attribute__((__aligned__(8))) a8 {}; struct __attribute__((__aligned__(16))) a16 {}; struct __attribute__((__aligned__(32))) a32 {}; } template<> class type_with_alignment<1> { public: typedef char type; }; template<> class type_with_alignment<2> { public: typedef align::a2 type; }; template<> class type_with_alignment<4> { public: typedef align::a4 type; }; template<> class type_with_alignment<8> { public: typedef align::a8 type; }; template<> class type_with_alignment<16> { public: typedef align::a16 type; }; template<> class type_with_alignment<32> { public: typedef align::a32 type; }; namespace detail { BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a2,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a4,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a8,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a16,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a32,true) } #endif #else // // Borland specific version, we have this for two reasons: // 1) The version above doesn't always compile (with the new test cases for example) // 2) Because of Borlands #pragma option we can create types with alignments that are // greater that the largest aligned builtin type. namespace align{ #pragma option push -a16 struct a2{ short s; }; struct a4{ int s; }; struct a8{ double s; }; struct a16{ long double s; }; #pragma option pop } namespace detail { typedef ::boost::align::a16 max_align; BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a2,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a4,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a8,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a16,true) } template
struct type_with_alignment { // We should never get to here, but if we do use the maximally // aligned type: // BOOST_STATIC_ASSERT(0); typedef align::a16 type; }; template <> struct type_with_alignment<1>{ typedef char type; }; template <> struct type_with_alignment<2>{ typedef align::a2 type; }; template <> struct type_with_alignment<4>{ typedef align::a4 type; }; template <> struct type_with_alignment<8>{ typedef align::a8 type; }; template <> struct type_with_alignment<16>{ typedef align::a16 type; }; #endif } // namespace boost #ifdef BOOST_MSVC # pragma warning(pop) #endif #include
#endif // BOOST_TT_TYPE_WITH_ALIGNMENT_INCLUDED
type_with_alignment.hpp
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