96 lines
2.3 KiB
Plaintext
96 lines
2.3 KiB
Plaintext
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/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2014-2014
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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 or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/intrusive for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP
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#define BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/config.hpp>
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#include <boost/core/no_exceptions_support.hpp>
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namespace boost {
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namespace intrusive {
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namespace detail {
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//This is not standard, but should work with all compilers
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union max_align
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{
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char char_;
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short short_;
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int int_;
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long long_;
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#ifdef BOOST_HAS_LONG_LONG
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::boost::long_long_type long_long_;
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#endif
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float float_;
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double double_;
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long double long_double_;
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void * void_ptr_;
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};
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template<class T, std::size_t N>
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class array_initializer
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{
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public:
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template<class CommonInitializer>
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array_initializer(const CommonInitializer &init)
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{
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char *init_buf = (char*)rawbuf;
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std::size_t i = 0;
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BOOST_TRY{
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for(; i != N; ++i){
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new(init_buf)T(init);
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init_buf += sizeof(T);
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}
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}
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BOOST_CATCH(...){
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while(i--){
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init_buf -= sizeof(T);
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((T*)init_buf)->~T();
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}
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BOOST_RETHROW;
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}
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BOOST_CATCH_END
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}
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operator T* ()
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{ return (T*)(rawbuf); }
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operator const T*() const
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{ return (const T*)(rawbuf); }
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~array_initializer()
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{
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char *init_buf = (char*)rawbuf + N*sizeof(T);
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for(std::size_t i = 0; i != N; ++i){
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init_buf -= sizeof(T);
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((T*)init_buf)->~T();
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}
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}
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private:
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detail::max_align rawbuf[(N*sizeof(T)-1)/sizeof(detail::max_align)+1];
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};
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} //namespace detail{
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} //namespace intrusive{
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} //namespace boost{
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#endif //BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP
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