profiler_vector_to_list.h

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// -*- C++ -*-
//
// Copyright (C) 2009-2019 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_vector_to_list.h
 *  @brief diagnostics for vector to list.
 */

// Written by Lixia Liu and Silvius Rus.

#ifndef _GLIBCXX_PROFILE_PROFILER_VECTOR_TO_LIST_H
#define _GLIBCXX_PROFILE_PROFILER_VECTOR_TO_LIST_H 1

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

namespace __gnu_profile
{
  /** @brief A vector-to-list instrumentation line in the object table.  */
  class __vector2list_info
  : public __object_info_base
  {
  public:
    __vector2list_info(__stack_t __stack)
    : __object_info_base(__stack), _M_shift_count(0), _M_iterate(0),
      _M_resize(0), _M_list_cost(0), _M_vector_cost(0)
    { }

    void
    __merge(const __vector2list_info& __o)
    {
      __object_info_base::__merge(__o);
      _M_shift_count  += __o._M_shift_count;
      _M_iterate      += __o._M_iterate;
      _M_vector_cost  += __o._M_vector_cost;
      _M_list_cost    += __o._M_list_cost;
      _M_resize       += __o._M_resize;
    }

    void
    __write(FILE* __f) const
    {
      std::fprintf(__f, "%Zu %Zu %Zu %.0f %.0f\n", _M_shift_count,
                   _M_resize, _M_iterate, _M_vector_cost, _M_list_cost);
    }

    float
    __magnitude() const
    { return _M_vector_cost - _M_list_cost; }

    std::string
    __advice() const 
    { return "change std::vector to std::list"; }

    std::size_t
    __shift_count()
    { return _M_shift_count; }

    std::size_t
    __iterate()
    { return _M_iterate; }

    float
    __list_cost()
    { return _M_list_cost; }

    std::size_t
    __resize()
    { return _M_resize; }

    void
    __set_list_cost(float __lc)
    { _M_list_cost = __lc; }
    
    void
    __set_vector_cost(float __vc)
    { _M_vector_cost = __vc; }
    
    void
    __opr_insert(std::size_t __pos, std::size_t __num)
    { _M_shift_count += __num - __pos; }

    void
    __opr_iterate(int __num)
    { __gnu_cxx::__atomic_add(&_M_iterate, __num); }

    void
    __resize(std::size_t __from, std::size_t)
    { _M_resize += __from; }

  private:
    std::size_t _M_shift_count;
    mutable _Atomic_word _M_iterate;
    std::size_t _M_resize;
    float _M_list_cost;
    float _M_vector_cost;
  };


  /** @brief A vector-to-list instrumentation line in the stack table.  */
  class __vector2list_stack_info
  : public __vector2list_info
  {
  public:
    __vector2list_stack_info(const __vector2list_info& __o) 
    : __vector2list_info(__o) { }
  };


  /** @brief Vector-to-list instrumentation producer.  */
  class __trace_vector_to_list
  : public __trace_base<__vector2list_info, __vector2list_stack_info> 
  {
  public:
    __trace_vector_to_list()
    : __trace_base<__vector2list_info, __vector2list_stack_info>()
    { __id = "vector-to-list"; }

    ~__trace_vector_to_list() { }

    // Call at destruction/clean to set container final size.
    void
    __destruct(__vector2list_info* __obj_info)
    {
      float __vc = __vector_cost(__obj_info->__shift_count(),
                                 __obj_info->__iterate(),
                                 __obj_info->__resize());
      float __lc = __list_cost(__obj_info->__shift_count(),
                               __obj_info->__iterate(),
                               __obj_info->__resize());
      __obj_info->__set_vector_cost(__vc);
      __obj_info->__set_list_cost(__lc);

      __retire_object(__obj_info);
    }

    // Collect cost of operations.
    float
    __vector_cost(std::size_t __shift, std::size_t __iterate,
                  std::size_t __resize)
    {
      return (__shift
              * _GLIBCXX_PROFILE_DATA(__vector_shift_cost_factor).__value
              + __iterate
              * _GLIBCXX_PROFILE_DATA(__vector_iterate_cost_factor).__value
              + __resize
              * _GLIBCXX_PROFILE_DATA(__vector_resize_cost_factor).__value);
    }

    float
    __list_cost(std::size_t __shift, std::size_t __iterate,
                std::size_t __resize)
    {
      return (__shift
              * _GLIBCXX_PROFILE_DATA(__list_shift_cost_factor).__value
              + __iterate
              * _GLIBCXX_PROFILE_DATA(__list_iterate_cost_factor).__value
              + __resize
              * _GLIBCXX_PROFILE_DATA(__list_resize_cost_factor).__value);
    }
  };


  inline void
  __trace_vector_to_list_init()
  { _GLIBCXX_PROFILE_DATA(_S_vector_to_list) = new __trace_vector_to_list(); }

  inline void
  __trace_vector_to_list_free()
  { delete _GLIBCXX_PROFILE_DATA(_S_vector_to_list); }

  inline void
  __trace_vector_to_list_report(FILE* __f, __warning_vector_t& __warnings)
  { __trace_report(_GLIBCXX_PROFILE_DATA(_S_vector_to_list), __f, __warnings); }

  inline __vector2list_info*
  __trace_vector_to_list_construct()
  {
    if (!__profcxx_init())
      return 0;

    if (!__reentrance_guard::__get_in())
      return 0;

    __reentrance_guard __get_out;
    return _GLIBCXX_PROFILE_DATA(_S_vector_to_list)
      ->__add_object(__get_stack());
  }

  inline void
  __trace_vector_to_list_insert(__vector2list_info* __obj_info,
                                std::size_t __pos,
                                std::size_t __num)
  {
    if (!__obj_info)
      return;

    __obj_info->__opr_insert(__pos, __num);
  }

  inline void
  __trace_vector_to_list_iterate(__vector2list_info* __obj_info, int)
  {
    if (!__obj_info)
      return;

    // We only collect if an iteration took place no matter in what side.
    __obj_info->__opr_iterate(1);
  }

  inline void
  __trace_vector_to_list_invalid_operator(__vector2list_info* __obj_info)
  {
    if (!__obj_info)
      return;

    __obj_info->__set_invalid();
  }

  inline void
  __trace_vector_to_list_resize(__vector2list_info* __obj_info,
                                std::size_t __from,
                                std::size_t __to)
  {
    if (!__obj_info)
      return;

    __obj_info->__resize(__from, __to);
  }

  inline void
  __trace_vector_to_list_destruct(__vector2list_info* __obj_info)
  {
    if (!__obj_info)
      return;

    _GLIBCXX_PROFILE_DATA(_S_vector_to_list)->__destruct(__obj_info);
  }

} // namespace __gnu_profile
#endif /* _GLIBCXX_PROFILE_PROFILER_VECTOR_TO_LIST_H */