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

// Copyright (C) 2009, 2010, 2011 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 along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

/** @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 <bits/c++0x_warning.h>
#else
# include <unordered_map>

#include <profile/base.h>

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

namespace std _GLIBCXX_VISIBILITY(default)
{
namespace __profile
{
  /// Class std::unordered_map wrapper with performance instrumentation.
  template<typename _Key, typename _Tp,
           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<typename _InputIterator>
        unordered_map(_InputIterator __f, _InputIterator __l,
                      size_type __n = 0,
                      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 unordered_map& __x)
      : _Base(__x) 
      { 
        __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::move(__x)) 
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
        __profcxx_hashtable_construct2(this);
      }

      unordered_map(initializer_list<value_type> __l,
                    size_type __n = 0,
                    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<value_type> __l)
      {
        this->clear();
        this->insert(__l);
        return *this;
      }

      ~unordered_map() noexcept
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(),
                                     _Base::size());
        _M_profile_destruct();
      }

      _Base&
      _M_base() noexcept       { return *this; }

      const _Base&
      _M_base() const noexcept { return *this; }

      void
      clear() noexcept
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(),
                                     _Base::size());
        _M_profile_destruct();
        _Base::clear();
      }

      template<typename... _Args>
        std::pair<iterator, bool>
        emplace(_Args&&... __args)
        {
          size_type __old_size = _Base::bucket_count();
          std::pair<iterator, bool> __res
            = _Base::emplace(std::forward<_Args>(__args)...);
          _M_profile_resize(__old_size);
          return __res;
        }

      template<typename... _Args>
        iterator
        emplace_hint(const_iterator __it, _Args&&... __args)
        {
          size_type __old_size = _Base::bucket_count();
          iterator __res
            = _Base::emplace_hint(__it, std::forward<_Args>(__args)...);
          _M_profile_resize(__old_size);
          return __res;
        }

      void
      insert(std::initializer_list<value_type> __l)
      { 
        size_type __old_size = _Base::bucket_count(); 
        _Base::insert(__l);
        _M_profile_resize(__old_size); 
      }

      std::pair<iterator, bool>
      insert(const value_type& __obj)
      {
        size_type __old_size = _Base::bucket_count();
        std::pair<iterator, bool> __res = _Base::insert(__obj);
        _M_profile_resize(__old_size); 
        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); 
        return __res;
      }

      template<typename _Pair, typename = typename
               std::enable_if<std::is_convertible<_Pair,
                                                  value_type>::value>::type>
        std::pair<iterator, bool>
        insert(_Pair&& __obj)
        {
          size_type __old_size = _Base::bucket_count();
          std::pair<iterator, bool> __res
            = _Base::insert(std::forward<_Pair>(__obj));
          _M_profile_resize(__old_size); 
          return __res;
        }

      template<typename _Pair, typename = typename
               std::enable_if<std::is_convertible<_Pair,
                                                  value_type>::value>::type>
        iterator
        insert(const_iterator __iter, _Pair&& __v)
        { 
          size_type __old_size = _Base::bucket_count(); 
          iterator __res = _Base::insert(__iter, std::forward<_Pair>(__v));
          _M_profile_resize(__old_size); 
          return __res;
        }

      template<typename _InputIter>
        void
        insert(_InputIter __first, _InputIter __last)
        {
          size_type __old_size = _Base::bucket_count(); 
          _Base::insert(__first, __last);
          _M_profile_resize(__old_size); 
        }

      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); 
      }

      // operator[]
      mapped_type&
      operator[](const _Key& __k)
      {
        size_type __old_size = _Base::bucket_count();
        mapped_type& __res = _M_base()[__k];
        _M_profile_resize(__old_size); 
        return __res;
      }

      mapped_type&
      operator[](_Key&& __k)
      {
        size_type __old_size = _Base::bucket_count();
        mapped_type& __res = _M_base()[std::move(__k)];
        _M_profile_resize(__old_size); 
        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); 
      }

    private:
      void
      _M_profile_resize(size_type __old_size)
      {
        size_type __new_size = _Base::bucket_count();
        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;
        iterator __it = this->begin();
        while (__it != this->end())
          {
            size_type __bkt = this->bucket(__it->first);
            auto __lit = this->begin(__bkt);
            auto __lend = this->end(__bkt);
            for (++__it, ++__lit; __lit != __lend; ++__it, ++__lit)
              ++__chain;
            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 _Key, typename _Tp, typename _Hash,
           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 _Key, typename _Tp, typename _Hash,
           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 _Key, typename _Tp, typename _Hash,
           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_C::_GLIBCXX_BASE

  /// Class std::unordered_multimap wrapper with performance instrumentation.
  template<typename _Key, typename _Tp,
           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<typename _InputIterator>
        unordered_multimap(_InputIterator __f, _InputIterator __l,
                           size_type __n = 0,
                           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 unordered_multimap& __x)
      : _Base(__x)
      {
        __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::move(__x))
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
      }

      unordered_multimap(initializer_list<value_type> __l,
                         size_type __n = 0,
                         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<value_type> __l)
      {
        this->clear();
        this->insert(__l);
        return *this;
      }

      ~unordered_multimap() noexcept
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
      }

      void
      clear() noexcept
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
        _Base::clear();
      }

      template<typename... _Args>
        iterator
        emplace(_Args&&... __args)
        {
          size_type __old_size = _Base::bucket_count();
          iterator __res
            = _Base::emplace(std::forward<_Args>(__args)...);
          _M_profile_resize(__old_size);
          return __res;
        }

      template<typename... _Args>
        iterator
        emplace_hint(const_iterator __it, _Args&&... __args)
        {
          size_type __old_size = _Base::bucket_count();
          iterator __res
            = _Base::emplace_hint(__it, std::forward<_Args>(__args)...);
          _M_profile_resize(__old_size);
          return __res;
        }

      void
      insert(std::initializer_list<value_type> __l)
      { 
        size_type __old_size = _Base::bucket_count();
        _Base::insert(__l);
        _M_profile_resize(__old_size);
      }

      iterator
      insert(const value_type& __obj)
      {
        size_type __old_size = _Base::bucket_count();
        iterator __res = _Base::insert(__obj);
        _M_profile_resize(__old_size); 
        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); 
        return __res;
      }

      template<typename _Pair, typename = typename
               std::enable_if<std::is_convertible<_Pair,
                                                  value_type>::value>::type>
        iterator
        insert(_Pair&& __obj)
        {
          size_type __old_size = _Base::bucket_count();
          iterator __res = _Base::insert(std::forward<_Pair>(__obj));
          _M_profile_resize(__old_size); 
          return __res;
        }

      template<typename _Pair, typename = typename
               std::enable_if<std::is_convertible<_Pair,
                                                  value_type>::value>::type>
        iterator
        insert(const_iterator __iter, _Pair&& __v)
        {
          size_type __old_size = _Base::bucket_count(); 
          iterator __res = _Base::insert(__iter, std::forward<_Pair>(__v));
          _M_profile_resize(__old_size); 
          return __res;
        }

      template<typename _InputIter>
        void
        insert(_InputIter __first, _InputIter __last)
        {
          size_type __old_size = _Base::bucket_count(); 
          _Base::insert(__first, __last);
          _M_profile_resize(__old_size); 
        }

      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); 
      }

      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); 
      }

    private:
      void
      _M_profile_resize(size_type __old_size)
      {
        size_type __new_size = _Base::bucket_count();
        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;
        iterator __it = this->begin();
        while (__it != this->end())
          {
            size_type __bkt = this->bucket(__it->first);
            auto __lit = this->begin(__bkt);
            auto __lend = this->end(__bkt);
            for (++__it, ++__lit; __lit != __lend; ++__it, ++__lit)
              ++__chain;
            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 _Key, typename _Tp, typename _Hash,
           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 _Key, typename _Tp, typename _Hash,
           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 _Key, typename _Tp, typename _Hash,
           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