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iterator_tracker.h
// Profiling iterator implementation -*- C++ -*- // Copyright (C) 2009-2013 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file profile/iterator_tracker.h * This file is a GNU profile extension to the Standard C++ Library. */ #ifndef _GLIBCXX_PROFILE_ITERATOR_TRACKER #define _GLIBCXX_PROFILE_ITERATOR_TRACKER 1 #include <ext/type_traits.h> namespace std _GLIBCXX_VISIBILITY(default) { namespace __profile { template<typename _Iterator, typename _Sequence> class __iterator_tracker { typedef __iterator_tracker _Self; // The underlying iterator _Iterator _M_current; // The underlying data structure const _Sequence* _M_ds; typedef std::iterator_traits<_Iterator> _Traits; public: typedef _Iterator _Base_iterator; typedef typename _Traits::iterator_category iterator_category; typedef typename _Traits::value_type value_type; typedef typename _Traits::difference_type difference_type; typedef typename _Traits::reference reference; typedef typename _Traits::pointer pointer; __iterator_tracker() : _M_current(), _M_ds(0) { } __iterator_tracker(const _Iterator& __i, const _Sequence* __seq) : _M_current(__i), _M_ds(__seq) { } __iterator_tracker(const __iterator_tracker& __x) : _M_current(__x._M_current), _M_ds(__x._M_ds) { } template<typename _MutableIterator> __iterator_tracker(const __iterator_tracker<_MutableIterator, typename __gnu_cxx::__enable_if <(std::__are_same<_MutableIterator, typename _Sequence::iterator::_Base_iterator>::__value), _Sequence>::__type>& __x) : _M_current(__x.base()), _M_ds(__x._M_get_sequence()) { } _Iterator base() const { return _M_current; } /** * @brief Conversion to underlying non-debug iterator to allow * better interaction with non-profile containers. */ operator _Iterator() const { return _M_current; } pointer operator->() const { return &*_M_current; } __iterator_tracker& operator++() { _M_ds->_M_profile_iterate(); ++_M_current; return *this; } __iterator_tracker operator++(int) { _M_ds->_M_profile_iterate(); __iterator_tracker __tmp(*this); ++_M_current; return __tmp; } __iterator_tracker& operator--() { _M_ds->_M_profile_iterate(1); --_M_current; return *this; } __iterator_tracker operator--(int) { _M_ds->_M_profile_iterate(1); __iterator_tracker __tmp(*this); --_M_current; return __tmp; } __iterator_tracker& operator=(const __iterator_tracker& __x) { _M_current = __x._M_current; return *this; } reference operator*() const { return *_M_current; } // ------ Random access iterator requirements ------ reference operator[](const difference_type& __n) const { return _M_current[__n]; } __iterator_tracker& operator+=(const difference_type& __n) { _M_current += __n; return *this; } __iterator_tracker operator+(const difference_type& __n) const { __iterator_tracker __tmp(*this); __tmp += __n; return __tmp; } __iterator_tracker& operator-=(const difference_type& __n) { _M_current += -__n; return *this; } __iterator_tracker operator-(const difference_type& __n) const { __iterator_tracker __tmp(*this); __tmp -= __n; return __tmp; } void _M_find() { _M_ds->_M_profile_find(); } const _Sequence* _M_get_sequence() const { return static_cast<const _Sequence*>(_M_ds); } }; template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator==(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() == __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator==(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() == __rhs.base(); } template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator!=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() != __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator!=(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() != __rhs.base(); } template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator<(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() < __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator<(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() < __rhs.base(); } template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator<=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() <= __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator<=(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() <= __rhs.base(); } template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator>(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() > __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator>(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() > __rhs.base(); } template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline bool operator>=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() >= __rhs.base(); } template<typename _Iterator, typename _Sequence> inline bool operator>=(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() >= __rhs.base(); } // _GLIBCXX_RESOLVE_LIB_DEFECTS // According to the resolution of DR179 not only the various comparison // operators but also operator- must accept mixed iterator/const_iterator // parameters. template<typename _IteratorL, typename _IteratorR, typename _Sequence> inline typename __iterator_tracker<_IteratorL, _Sequence>::difference_type operator-(const __iterator_tracker<_IteratorL, _Sequence>& __lhs, const __iterator_tracker<_IteratorR, _Sequence>& __rhs) { return __lhs.base() - __rhs.base(); } template<typename _Iterator, typename _Sequence> inline typename __iterator_tracker<_Iterator, _Sequence>::difference_type operator-(const __iterator_tracker<_Iterator, _Sequence>& __lhs, const __iterator_tracker<_Iterator, _Sequence>& __rhs) { return __lhs.base() - __rhs.base(); } template<typename _Iterator, typename _Sequence> inline __iterator_tracker<_Iterator, _Sequence> operator+(typename __iterator_tracker<_Iterator,_Sequence>::difference_type __n, const __iterator_tracker<_Iterator, _Sequence>& __i) { return __i + __n; } } // namespace __profile } // namespace std #endif