// -*- 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 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/impl/profiler_map_to_unordered_map.h
 *  @brief Diagnostics for map to unordered_map.
 */

// Written by Silvius Rus.

#ifndef _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H
#define _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H 1

#include "profile/impl/profiler.h"
#include "profile/impl/profiler_node.h"
#include "profile/impl/profiler_trace.h"

namespace __gnu_profile
{
  inline int
  __log2(std::size_t __size)
  {
    for (int __bit_count = sizeof(std::size_t) - 1; __bit_count >= 0;
	 -- __bit_count) 
      if ((2 << __bit_count) & __size)
	return __bit_count;
    return 0;
  }

  inline float
  __map_insert_cost(std::size_t __size)
  { return (_GLIBCXX_PROFILE_DATA(__map_insert_cost_factor).__value 
	    * static_cast<float>(__log2(__size))); }

  inline float
  __map_erase_cost(std::size_t __size)
  { return (_GLIBCXX_PROFILE_DATA(__map_erase_cost_factor).__value
	    * static_cast<float>(__log2(__size))); }

  inline float
  __map_find_cost(std::size_t __size)
  { return (_GLIBCXX_PROFILE_DATA(__map_find_cost_factor).__value
	    * static_cast<float>(__log2(__size))); }

  /** @brief A map-to-unordered_map instrumentation line in the 
      object table.  */
  class __map2umap_info
  : public __object_info_base
  {
  public:
    __map2umap_info()
    : _M_insert(0), _M_erase(0), _M_find(0), _M_iterate(0),
      _M_umap_cost(0.0), _M_map_cost(0.0), _M_valid(true) { }
    
    __map2umap_info(__stack_t __stack)
    : __object_info_base(__stack), _M_insert(0), _M_erase(0), _M_find(0), 
      _M_iterate(0), _M_umap_cost(0.0), _M_map_cost(0.0), _M_valid(true) { }

    virtual ~__map2umap_info() { }

    __map2umap_info(const __map2umap_info& __o)
    : __object_info_base(__o), _M_insert(__o._M_insert),
      _M_erase(__o._M_erase), _M_find(__o._M_find),
      _M_iterate(__o._M_iterate), _M_umap_cost(__o._M_umap_cost),
      _M_map_cost(__o._M_map_cost), _M_valid(__o._M_valid) { }

    void
    __merge(const __map2umap_info& __o)
    {
      _M_insert    += __o._M_insert;
      _M_erase     += __o._M_erase;
      _M_find      += __o._M_find;
      _M_umap_cost += __o._M_umap_cost;
      _M_map_cost  += __o._M_map_cost;
      _M_valid     &= __o._M_valid;
    }

    void
    __write(FILE* __f) const
    {
      std::fprintf(__f, "%Zu %Zu %Zu %Zu %.0f %.0f %s\n",
		   _M_insert, _M_erase, _M_find, _M_iterate, _M_map_cost,
		   _M_umap_cost, _M_valid ? "valid" : "invalid");
    }

    float
    __magnitude() const
    { return _M_map_cost - _M_umap_cost; }

    std::string
    __advice() const
    { return "change std::map to std::unordered_map"; }

    void
    __record_insert(std::size_t __size, std::size_t __count)
    {
      _M_insert += __count;
      _M_map_cost += __count * __map_insert_cost(__size);
      _M_umap_cost
	+= (__count
	    * _GLIBCXX_PROFILE_DATA(__umap_insert_cost_factor).__value);
    }

    void
    __record_erase(std::size_t __size, std::size_t __count)
    {
      _M_erase += __count;
      _M_map_cost += __count * __map_erase_cost(__size);
      _M_umap_cost
	+= (__count
	    * _GLIBCXX_PROFILE_DATA(__umap_erase_cost_factor).__value);
    }

    void
    __record_find(std::size_t __size)
    {
      _M_find += 1;
      _M_map_cost += __map_find_cost(__size);
      _M_umap_cost += _GLIBCXX_PROFILE_DATA(__umap_find_cost_factor).__value;
    }

    void
    __record_iterate(std::size_t __count)
    {
      _M_iterate += __count;
      _M_map_cost
	+= (__count
	    * _GLIBCXX_PROFILE_DATA(__map_iterate_cost_factor).__value);
      _M_umap_cost
	+= (__count
	    * _GLIBCXX_PROFILE_DATA(__umap_iterate_cost_factor).__value);
    }

    void
    __record_invalidate()
    { _M_valid = false; }

  private:
    std::size_t _M_insert;
    std::size_t _M_erase;
    std::size_t _M_find;
    std::size_t _M_iterate;
    float _M_umap_cost;
    float _M_map_cost;
    bool  _M_valid;
  };


  /** @brief A map-to-unordered_map instrumentation line in the 
      stack table.  */
  class __map2umap_stack_info 
  : public __map2umap_info
  {
  public:
    __map2umap_stack_info(const __map2umap_info& __o)
    : __map2umap_info(__o) { }
  };

  /** @brief Map-to-unordered_map instrumentation producer.  */
  class __trace_map2umap
  : public __trace_base<__map2umap_info, __map2umap_stack_info> 
  {
  public:
    __trace_map2umap()
    : __trace_base<__map2umap_info, __map2umap_stack_info>()
    { __id = "map-to-unordered-map"; }
  };

  inline void
  __trace_map_to_unordered_map_init()
  { _GLIBCXX_PROFILE_DATA(_S_map2umap) = new __trace_map2umap(); }

  inline void
  __trace_map_to_unordered_map_report(FILE* __f,
				      __warning_vector_t& __warnings)
  {
    if (_GLIBCXX_PROFILE_DATA(_S_map2umap)) 
      {
	_GLIBCXX_PROFILE_DATA(_S_map2umap)->__collect_warnings(__warnings);
	_GLIBCXX_PROFILE_DATA(_S_map2umap)->__write(__f);
      }
  }

  inline void
  __trace_map_to_unordered_map_construct(const void* __obj)
  {
    if (!__profcxx_init())
      return;

    _GLIBCXX_PROFILE_DATA(_S_map2umap)->
      __add_object(__obj, __map2umap_info(__get_stack()));
  }

  inline void
  __trace_map_to_unordered_map_destruct(const void* __obj)
  {
    if (!__profcxx_init())
      return;

    _GLIBCXX_PROFILE_DATA(_S_map2umap)->__retire_object(__obj);
  }

  inline void
  __trace_map_to_unordered_map_insert(const void* __obj, 
				      std::size_t __size, std::size_t __count)
  {
    if (!__profcxx_init())
      return;

    __map2umap_info* __info
      = _GLIBCXX_PROFILE_DATA(_S_map2umap)->__get_object_info(__obj);

    if (__info)
      __info->__record_insert(__size, __count);
  }

  inline void
  __trace_map_to_unordered_map_erase(const void* __obj, 
				     std::size_t __size, std::size_t __count)
  {
    if (!__profcxx_init()) 
      return;

    __map2umap_info* __info 
      = _GLIBCXX_PROFILE_DATA(_S_map2umap)->__get_object_info(__obj);

    if (__info)
      __info->__record_erase(__size, __count);
  }

  inline void
  __trace_map_to_unordered_map_find(const void* __obj, std::size_t __size)
  {
    if (!__profcxx_init())
      return;

    __map2umap_info* __info
      = _GLIBCXX_PROFILE_DATA(_S_map2umap)->__get_object_info(__obj);

    if (__info)
      __info->__record_find(__size);
  }

  inline void
  __trace_map_to_unordered_map_iterate(const void* __obj, std::size_t __count)
  {
    if (!__profcxx_init())
      return;

    __map2umap_info* __info
      = _GLIBCXX_PROFILE_DATA(_S_map2umap)->__get_object_info(__obj);
    
    if (__info)
      __info->__record_iterate(__count);
  }

  inline void
  __trace_map_to_unordered_map_invalidate(const void* __obj)
  {
    if (!__profcxx_init())
      return;

    __map2umap_info* __info
      = _GLIBCXX_PROFILE_DATA(_S_map2umap)->__get_object_info(__obj);

    if (__info)
      __info->__record_invalidate();
  }

} // namespace __gnu_profile
#endif /* _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H */