522 lines
14 KiB
C++
522 lines
14 KiB
C++
//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
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//Distributed under the Boost Software License, Version 1.0. (See accompanying
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//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef UUID_274DA366004E11DCB1DDFE2E56D89593
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#define UUID_274DA366004E11DCB1DDFE2E56D89593
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#if (__GNUC__*100+__GNUC_MINOR__>301) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
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#pragma GCC system_header
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#endif
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#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
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#pragma warning(push,1)
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#endif
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#ifdef BOOST_EXCEPTION_MINI_BOOST
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#include <memory>
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namespace boost { namespace exception_detail { using std::shared_ptr; } }
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#else
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namespace boost { template <class T> class shared_ptr; };
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namespace boost { namespace exception_detail { using boost::shared_ptr; } }
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#endif
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namespace
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boost
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{
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namespace
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exception_detail
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{
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template <class T>
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class
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refcount_ptr
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{
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public:
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refcount_ptr():
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px_(0)
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{
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}
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~refcount_ptr()
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{
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release();
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}
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refcount_ptr( refcount_ptr const & x ):
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px_(x.px_)
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{
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add_ref();
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}
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refcount_ptr &
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operator=( refcount_ptr const & x )
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{
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adopt(x.px_);
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return *this;
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}
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void
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adopt( T * px )
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{
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release();
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px_=px;
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add_ref();
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}
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T *
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get() const
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{
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return px_;
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}
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private:
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T * px_;
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void
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add_ref()
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{
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if( px_ )
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px_->add_ref();
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}
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void
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release()
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{
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if( px_ && px_->release() )
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px_=0;
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}
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};
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}
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////////////////////////////////////////////////////////////////////////
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template <class Tag,class T>
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class error_info;
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typedef error_info<struct throw_function_,char const *> throw_function;
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typedef error_info<struct throw_file_,char const *> throw_file;
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typedef error_info<struct throw_line_,int> throw_line;
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template <>
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class
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error_info<throw_function_,char const *>
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{
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public:
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typedef char const * value_type;
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value_type v_;
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explicit
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error_info( value_type v ):
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v_(v)
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{
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}
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};
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template <>
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class
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error_info<throw_file_,char const *>
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{
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public:
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typedef char const * value_type;
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value_type v_;
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explicit
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error_info( value_type v ):
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v_(v)
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{
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}
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};
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template <>
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class
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error_info<throw_line_,int>
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{
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public:
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typedef int value_type;
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value_type v_;
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explicit
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error_info( value_type v ):
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v_(v)
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{
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}
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};
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility push (default)
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# endif
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#endif
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class exception;
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility pop
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# endif
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#endif
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namespace
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exception_detail
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{
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class error_info_base;
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struct type_info_;
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struct
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error_info_container
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{
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virtual char const * diagnostic_information( char const * ) const = 0;
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virtual shared_ptr<error_info_base> get( type_info_ const & ) const = 0;
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virtual void set( shared_ptr<error_info_base> const &, type_info_ const & ) = 0;
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virtual void add_ref() const = 0;
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virtual bool release() const = 0;
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virtual refcount_ptr<exception_detail::error_info_container> clone() const = 0;
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protected:
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~error_info_container() throw()
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{
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}
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};
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template <class>
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struct get_info;
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template <>
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struct get_info<throw_function>;
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template <>
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struct get_info<throw_file>;
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template <>
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struct get_info<throw_line>;
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template <class>
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struct set_info_rv;
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template <>
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struct set_info_rv<throw_function>;
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template <>
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struct set_info_rv<throw_file>;
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template <>
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struct set_info_rv<throw_line>;
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char const * get_diagnostic_information( exception const &, char const * );
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void copy_boost_exception( exception *, exception const * );
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template <class E,class Tag,class T>
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E const & set_info( E const &, error_info<Tag,T> const & );
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template <class E>
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E const & set_info( E const &, throw_function const & );
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template <class E>
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E const & set_info( E const &, throw_file const & );
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template <class E>
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E const & set_info( E const &, throw_line const & );
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}
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility push (default)
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# endif
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#endif
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class
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exception
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{
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//<N3757>
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public:
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template <class Tag> void set( typename Tag::type const & );
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template <class Tag> typename Tag::type const * get() const;
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//</N3757>
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protected:
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exception():
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throw_function_(0),
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throw_file_(0),
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throw_line_(-1)
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{
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}
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#ifdef __HP_aCC
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//On HP aCC, this protected copy constructor prevents throwing boost::exception.
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//On all other platforms, the same effect is achieved by the pure virtual destructor.
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exception( exception const & x ) throw():
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data_(x.data_),
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throw_function_(x.throw_function_),
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throw_file_(x.throw_file_),
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throw_line_(x.throw_line_)
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{
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}
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#endif
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virtual ~exception() throw()
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#ifndef __HP_aCC
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= 0 //Workaround for HP aCC, =0 incorrectly leads to link errors.
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#endif
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;
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#if (defined(__MWERKS__) && __MWERKS__<=0x3207) || (defined(_MSC_VER) && _MSC_VER<=1310)
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public:
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#else
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private:
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_function const & );
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_file const & );
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_line const & );
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template <class E,class Tag,class T>
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friend E const & exception_detail::set_info( E const &, error_info<Tag,T> const & );
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friend char const * exception_detail::get_diagnostic_information( exception const &, char const * );
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template <class>
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friend struct exception_detail::get_info;
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friend struct exception_detail::get_info<throw_function>;
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friend struct exception_detail::get_info<throw_file>;
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friend struct exception_detail::get_info<throw_line>;
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template <class>
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friend struct exception_detail::set_info_rv;
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friend struct exception_detail::set_info_rv<throw_function>;
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friend struct exception_detail::set_info_rv<throw_file>;
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friend struct exception_detail::set_info_rv<throw_line>;
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friend void exception_detail::copy_boost_exception( exception *, exception const * );
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#endif
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mutable exception_detail::refcount_ptr<exception_detail::error_info_container> data_;
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mutable char const * throw_function_;
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mutable char const * throw_file_;
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mutable int throw_line_;
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};
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility pop
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# endif
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#endif
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inline
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exception::
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~exception() throw()
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{
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}
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namespace
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exception_detail
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{
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template <class E>
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E const &
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set_info( E const & x, throw_function const & y )
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{
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x.throw_function_=y.v_;
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return x;
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}
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template <class E>
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E const &
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set_info( E const & x, throw_file const & y )
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{
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x.throw_file_=y.v_;
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return x;
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}
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template <class E>
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E const &
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set_info( E const & x, throw_line const & y )
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{
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x.throw_line_=y.v_;
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return x;
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}
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}
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////////////////////////////////////////////////////////////////////////
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namespace
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exception_detail
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{
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility push (default)
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# endif
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#endif
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template <class T>
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struct
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error_info_injector:
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public T,
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public exception
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{
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explicit
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error_info_injector( T const & x ):
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T(x)
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{
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}
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~error_info_injector() throw()
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{
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}
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};
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility pop
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# endif
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#endif
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struct large_size { char c[256]; };
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large_size dispatch_boost_exception( exception const * );
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struct small_size { };
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small_size dispatch_boost_exception( void const * );
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template <class,int>
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struct enable_error_info_helper;
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template <class T>
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struct
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enable_error_info_helper<T,sizeof(large_size)>
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{
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typedef T type;
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};
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template <class T>
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struct
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enable_error_info_helper<T,sizeof(small_size)>
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{
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typedef error_info_injector<T> type;
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};
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template <class T>
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struct
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enable_error_info_return_type
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{
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typedef typename enable_error_info_helper<T,sizeof(exception_detail::dispatch_boost_exception(static_cast<T *>(0)))>::type type;
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};
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}
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template <class T>
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inline
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typename
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exception_detail::enable_error_info_return_type<T>::type
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enable_error_info( T const & x )
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{
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typedef typename exception_detail::enable_error_info_return_type<T>::type rt;
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return rt(x);
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}
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////////////////////////////////////////////////////////////////////////
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namespace
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exception_detail
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{
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility push (default)
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# endif
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#endif
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class
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clone_base
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{
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public:
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virtual clone_base const * clone() const = 0;
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virtual void rethrow() const = 0;
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virtual
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~clone_base() throw()
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{
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}
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};
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility pop
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# endif
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#endif
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inline
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void
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copy_boost_exception( exception * a, exception const * b )
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{
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refcount_ptr<error_info_container> data;
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if( error_info_container * d=b->data_.get() )
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data = d->clone();
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a->throw_file_ = b->throw_file_;
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a->throw_line_ = b->throw_line_;
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a->throw_function_ = b->throw_function_;
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a->data_ = data;
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}
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inline
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void
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copy_boost_exception( void *, void const * )
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{
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}
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility push (default)
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# endif
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#endif
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template <class T>
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class
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clone_impl:
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public T,
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public virtual clone_base
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{
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struct clone_tag { };
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clone_impl( clone_impl const & x, clone_tag ):
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T(x)
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{
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copy_boost_exception(this,&x);
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}
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public:
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explicit
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clone_impl( T const & x ):
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T(x)
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{
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copy_boost_exception(this,&x);
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}
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~clone_impl() throw()
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{
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}
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private:
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clone_base const *
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clone() const
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{
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return new clone_impl(*this,clone_tag());
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}
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void
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rethrow() const
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{
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throw*this;
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}
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};
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}
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#if defined(__GNUC__)
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# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
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# pragma GCC visibility pop
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# endif
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#endif
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template <class T>
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inline
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exception_detail::clone_impl<T>
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enable_current_exception( T const & x )
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{
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return exception_detail::clone_impl<T>(x);
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}
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}
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#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
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#pragma warning(pop)
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#endif
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#endif
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