Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: //
Chris@102: // (C) Copyright Ion Gaztanaga  2014-2014
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0.
Chris@102: //    (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: //          http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // See http://www.boost.org/libs/intrusive for documentation.
Chris@102: //
Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: 
Chris@102: #ifndef BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP
Chris@102: #define BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP
Chris@102: 
Chris@102: #ifndef BOOST_CONFIG_HPP
Chris@102: #  include <boost/config.hpp>
Chris@102: #endif
Chris@102: 
Chris@102: #if defined(BOOST_HAS_PRAGMA_ONCE)
Chris@102: #  pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/config.hpp>
Chris@102: #include <boost/core/no_exceptions_support.hpp>
Chris@102: 
Chris@102: namespace boost {
Chris@102: namespace intrusive {
Chris@102: namespace detail {
Chris@102: 
Chris@102: //This is not standard, but should work with all compilers
Chris@102: union max_align
Chris@102: {
Chris@102:    char        char_;
Chris@102:    short       short_;
Chris@102:    int         int_;
Chris@102:    long        long_;
Chris@102:    #ifdef BOOST_HAS_LONG_LONG
Chris@102:    ::boost::long_long_type  long_long_;
Chris@102:    #endif
Chris@102:    float       float_;
Chris@102:    double      double_;
Chris@102:    long double long_double_;
Chris@102:    void *      void_ptr_;
Chris@102: };
Chris@102: 
Chris@102: template<class T, std::size_t N>
Chris@102: class array_initializer
Chris@102: {
Chris@102:    public:
Chris@102:    template<class CommonInitializer>
Chris@102:    array_initializer(const CommonInitializer &init)
Chris@102:    {
Chris@102:       char *init_buf = (char*)rawbuf;
Chris@102:       std::size_t i = 0;
Chris@102:       BOOST_TRY{
Chris@102:          for(; i != N; ++i){
Chris@102:             new(init_buf)T(init);
Chris@102:             init_buf += sizeof(T);
Chris@102:          }
Chris@102:       }
Chris@102:       BOOST_CATCH(...){
Chris@102:          while(i--){
Chris@102:             init_buf -= sizeof(T);
Chris@102:             ((T*)init_buf)->~T();
Chris@102:          }
Chris@102:          BOOST_RETHROW;
Chris@102:       }
Chris@102:       BOOST_CATCH_END
Chris@102:    }
Chris@102: 
Chris@102:    operator T* ()
Chris@102:    {  return (T*)(rawbuf);  }
Chris@102: 
Chris@102:    operator const T*() const
Chris@102:    {  return (const T*)(rawbuf);  }
Chris@102: 
Chris@102:    ~array_initializer()
Chris@102:    {
Chris@102:       char *init_buf = (char*)rawbuf + N*sizeof(T);
Chris@102:       for(std::size_t i = 0; i != N; ++i){
Chris@102:          init_buf -= sizeof(T);
Chris@102:          ((T*)init_buf)->~T();
Chris@102:       }
Chris@102:    }
Chris@102: 
Chris@102:    private:
Chris@102:    detail::max_align rawbuf[(N*sizeof(T)-1)/sizeof(detail::max_align)+1];
Chris@102: };
Chris@102: 
Chris@102: }  //namespace detail{
Chris@102: }  //namespace intrusive{
Chris@102: }  //namespace boost{
Chris@102: 
Chris@102: #endif //BOOST_INTRUSIVE_DETAIL_ARRAY_INITIALIZER_HPP