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// Profiling unordered_map/unordered_multimap implementation -*- C++ -*-

// Copyright (C) 2009, 2010 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 2, 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.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

/** @file profile/unordered_map

 *  This file is a GNU profile extension to the Standard C++ Library.

 */

#ifndef _GLIBCXX_PROFILE_UNORDERED_MAP

#define _GLIBCXX_PROFILE_UNORDERED_MAP 1

#ifndef __GXX_EXPERIMENTAL_CXX0X__

# include 

#else

# include 

#include 

#define _GLIBCXX_BASE unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>

#define _GLIBCXX_STD_BASE _GLIBCXX_STD_PR::_GLIBCXX_BASE

namespace std

{

namespace __profile

{

  /// Class std::unordered_map wrapper with performance instrumentation.

  template

           typename _Hash  = std::hash<_Key>,

           typename _Pred = std::equal_to<_Key>,

           typename _Alloc =  std::allocator<_Key> >

    class unordered_map

    : public _GLIBCXX_STD_BASE

    {

      typedef typename _GLIBCXX_STD_BASE _Base;

    public:

      typedef typename _Base::size_type       size_type;

      typedef typename _Base::hasher          hasher;

      typedef typename _Base::key_equal       key_equal;

      typedef typename _Base::allocator_type  allocator_type;

      typedef typename _Base::key_type        key_type;

      typedef typename _Base::value_type      value_type;

      typedef typename _Base::difference_type difference_type;

      typedef typename _Base::reference       reference;

      typedef typename _Base::const_reference const_reference;

      typedef typename _Base::mapped_type      mapped_type;

      typedef typename _Base::iterator iterator;

      typedef typename _Base::const_iterator const_iterator;

      explicit

      unordered_map(size_type __n = 10,

                    const hasher& __hf = hasher(),

                    const key_equal& __eql = key_equal(),

                    const allocator_type& __a = allocator_type())

      : _Base(__n, __hf, __eql, __a)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

        __profcxx_hashtable_construct2(this);

      }

      template

        unordered_map(_InputIterator __f, _InputIterator __l,

              size_type __n = 10,

              const hasher& __hf = hasher(),

              const key_equal& __eql = key_equal(),

              const allocator_type& __a = allocator_type())

      : _Base(__f, __l, __n, __hf, __eql, __a)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

        __profcxx_hashtable_construct2(this);

      }

      unordered_map(const _Base& __x)

      : _Base(__x)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

        __profcxx_hashtable_construct2(this);

      }

      unordered_map(unordered_map&& __x)

      : _Base(std::forward<_Base>(__x))

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

        __profcxx_hashtable_construct2(this);

      }

      unordered_map(initializer_list __l,

                    size_type __n = 10,

                    const hasher& __hf = hasher(),

                    const key_equal& __eql = key_equal(),

                    const allocator_type& __a = allocator_type())

      : _Base(__l, __n, __hf, __eql, __a) { }

      unordered_map&

      operator=(const unordered_map& __x)

      {

        *static_cast<_Base*>(this) = __x;

        return *this;

      }

      unordered_map&

      operator=(unordered_map&& __x)

      {

        // NB: DR 1204.

        // NB: DR 675.

        this->clear();

        this->swap(__x);

        return *this;

      }

      unordered_map&

      operator=(initializer_list __l)

      {

        this->clear();

        this->insert(__l);

        return *this;

      }

      ~unordered_map()

      {

        __profcxx_hashtable_destruct(this, _Base::bucket_count(),

                                     _Base::size());

        _M_profile_destruct();

      }

      _Base&

      _M_base()       { return *this; }

      const _Base&

      _M_base() const { return *this; }

      void

      clear()

      {

        __profcxx_hashtable_destruct(this, _Base::bucket_count(),

                                     _Base::size());

        _M_profile_destruct();

        _Base::clear();

      }

      void

      insert(std::initializer_list __l)

      {

        size_type __old_size = _Base::bucket_count();

        _Base::insert(__l);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

      std::pair

      insert(const value_type& __obj)

      {

        size_type __old_size =  _Base::bucket_count();

        std::pair __res = _Base::insert(__obj);

        _M_profile_resize(__old_size, _Base::bucket_count());

        return __res;

      }

      iterator

      insert(const_iterator __iter, const value_type& __v)

      {

        size_type __old_size = _Base::bucket_count();

        iterator __res = _Base::insert(__iter, __v);

        _M_profile_resize(__old_size, _Base::bucket_count());

        return __res;

      }

      template

        void

        insert(_InputIter __first, _InputIter __last)

        {

          size_type __old_size = _Base::bucket_count();

          _Base::insert(__first, __last);

          _M_profile_resize(__old_size, _Base::bucket_count());

        }

      void

      insert(const value_type* __first, const value_type* __last)

      {

        size_type __old_size = _Base::bucket_count();

        _Base::insert(__first, __last);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

      // operator []

      mapped_type&

      operator[](const _Key& _k)

      {

        size_type __old_size =  _Base::bucket_count();

        mapped_type& __res = _M_base()[_k];

        size_type __new_size =  _Base::bucket_count();

        _M_profile_resize(__old_size, _Base::bucket_count());

        return __res;

      }

      void

      swap(unordered_map& __x)

      { _Base::swap(__x); }

      void rehash(size_type __n)

      {

        size_type __old_size =  _Base::bucket_count();

        _Base::rehash(__n);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

    private:

      void

      _M_profile_resize(size_type __old_size, size_type __new_size)

      {

        if (__old_size != __new_size)

          __profcxx_hashtable_resize(this, __old_size, __new_size);

      }

      void

      _M_profile_destruct()

      {

        size_type __hops = 0, __lc = 0, __chain = 0;

        for (iterator __it = _M_base().begin(); __it != _M_base().end();

             ++__it)

          {

            while (__it._M_cur_node->_M_next)

              {

                ++__chain;

                ++__it;

              }

            if (__chain)

              {

                ++__chain;

                __lc = __lc > __chain ? __lc : __chain;

                __hops += __chain * (__chain - 1) / 2;

                __chain = 0;

              }

          }

        __profcxx_hashtable_destruct2(this, __lc,  _Base::size(), __hops);

      }

   };

  template

           typename _Pred, typename _Alloc>

    inline void

    swap(unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

         unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { __x.swap(__y); }

  template

           typename _Pred, typename _Alloc>

    inline bool

    operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

               const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { return __x._M_equal(__y); }

  template

           typename _Pred, typename _Alloc>

    inline bool

    operator!=(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

               const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { return !(__x == __y); }

#undef _GLIBCXX_BASE

#undef _GLIBCXX_STD_BASE

#define _GLIBCXX_BASE unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>

#define _GLIBCXX_STD_BASE _GLIBCXX_STD_PR::_GLIBCXX_BASE

  /// Class std::unordered_multimap wrapper with performance instrumentation.

  template

           typename _Hash  = std::hash<_Key>,

           typename _Pred = std::equal_to<_Key>,

           typename _Alloc =  std::allocator<_Key> >

    class unordered_multimap

    : public _GLIBCXX_STD_BASE

    {

      typedef typename _GLIBCXX_STD_BASE _Base;

    public:

      typedef typename _Base::size_type       size_type;

      typedef typename _Base::hasher          hasher;

      typedef typename _Base::key_equal       key_equal;

      typedef typename _Base::allocator_type  allocator_type;

      typedef typename _Base::key_type        key_type;

      typedef typename _Base::value_type      value_type;

      typedef typename _Base::difference_type difference_type;

      typedef typename _Base::reference       reference;

      typedef typename _Base::const_reference const_reference;

      typedef typename _Base::iterator iterator;

      typedef typename _Base::const_iterator const_iterator;

      explicit

      unordered_multimap(size_type __n = 10,

                    const hasher& __hf = hasher(),

                    const key_equal& __eql = key_equal(),

                    const allocator_type& __a = allocator_type())

      : _Base(__n, __hf, __eql, __a)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

      }

      template

        unordered_multimap(_InputIterator __f, _InputIterator __l,

              size_type __n = 10,

              const hasher& __hf = hasher(),

              const key_equal& __eql = key_equal(),

              const allocator_type& __a = allocator_type())

      : _Base(__f, __l, __n, __hf, __eql, __a)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

      }

      unordered_multimap(const _Base& __x)

      : _Base(__x)

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

      }

      unordered_multimap(unordered_multimap&& __x)

      : _Base(std::forward<_Base>(__x))

      {

        __profcxx_hashtable_construct(this, _Base::bucket_count());

      }

      unordered_multimap(initializer_list __l,

                         size_type __n = 10,

                         const hasher& __hf = hasher(),

                         const key_equal& __eql = key_equal(),

                         const allocator_type& __a = allocator_type())

      : _Base(__l, __n, __hf, __eql, __a) { }

      unordered_multimap&

      operator=(const unordered_multimap& __x)

      {

        *static_cast<_Base*>(this) = __x;

        return *this;

      }

      unordered_multimap&

      operator=(unordered_multimap&& __x)

      {

        // NB: DR 1204.

        // NB: DR 675.

        this->clear();

        this->swap(__x);

        return *this;

      }

      unordered_multimap&

      operator=(initializer_list __l)

      {

        this->clear();

        this->insert(__l);

        return *this;

      }

      ~unordered_multimap()

      {

        __profcxx_hashtable_destruct(this, _Base::bucket_count(),

                                     _Base::size());

        _M_profile_destruct();

      }

      _Base&

      _M_base()       { return *this; }

      const _Base&

      _M_base() const { return *this; }

      void

      clear()

      {

        __profcxx_hashtable_destruct(this, _Base::bucket_count(),

                                     _Base::size());

        _M_profile_destruct();

        _Base::clear();

      }

      void

      insert(std::initializer_list __l)

      {

        size_type __old_size =  _Base::bucket_count();

        _Base::insert(__l);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

      iterator

      insert(const value_type& __obj)

      {

        size_type __old_size =  _Base::bucket_count();

        iterator __res = _Base::insert(__obj);

        _M_profile_resize(__old_size, _Base::bucket_count());

        return __res;

      }

      iterator

      insert(const_iterator __iter, const value_type& __v)

      {

        size_type __old_size = _Base::bucket_count();

        iterator __res =_Base::insert(__iter, __v);

        _M_profile_resize(__old_size, _Base::bucket_count());

        return __res;

      }

      template

        void

        insert(_InputIter __first, _InputIter __last)

        {

          size_type __old_size = _Base::bucket_count();

          _Base::insert(__first, __last);

          _M_profile_resize(__old_size, _Base::bucket_count());

        }

      void

      insert(const value_type* __first, const value_type* __last)

      {

        size_type __old_size = _Base::bucket_count();

        _Base::insert(__first, __last);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

      void

      swap(unordered_multimap& __x)

      { _Base::swap(__x); }

      void rehash(size_type __n)

      {

        size_type __old_size =  _Base::bucket_count();

        _Base::rehash(__n);

        _M_profile_resize(__old_size, _Base::bucket_count());

      }

    private:

      void

      _M_profile_resize(size_type __old_size, size_type __new_size)

      {

        if (__old_size != __new_size)

          __profcxx_hashtable_resize(this, __old_size, __new_size);

      }

      void

      _M_profile_destruct()

      {

        size_type __hops = 0, __lc = 0, __chain = 0;

        for (iterator __it = _M_base().begin(); __it != _M_base().end();

             ++__it)

          {

            while (__it._M_cur_node->_M_next)

              {

                ++__chain;

                ++__it;

              }

            if (__chain)

              {

                ++__chain;

                __lc = __lc > __chain ? __lc : __chain;

                __hops += __chain * (__chain - 1) / 2;

                __chain = 0;

              }

          }

        __profcxx_hashtable_destruct2(this, __lc,  _Base::size(), __hops);

      }

    };

  template

           typename _Pred, typename _Alloc>

    inline void

    swap(unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

         unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { __x.swap(__y); }

  template

           typename _Pred, typename _Alloc>

    inline bool

    operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

               const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { return __x._M_equal(__y); }

  template

           typename _Pred, typename _Alloc>

    inline bool

    operator!=(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,

               const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)

    { return !(__x == __y); }

} // namespace __profile

} // namespace std

#undef _GLIBCXX_BASE

#undef _GLIBCXX_STD_BASE

#endif // __GXX_EXPERIMENTAL_CXX0X__

#endif