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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_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(__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)
{ }
void
__merge(const __map2umap_info& __o)
{
__object_info_base::__merge(__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;
}
void
__write(FILE* __f) const
{
std::fprintf(__f, "%Zu %Zu %Zu %Zu %.0f %.0f\n",
_M_insert, _M_erase, _M_find, _M_iterate, _M_map_cost,
_M_umap_cost);
}
float
__magnitude() const
{ return _M_map_cost - _M_umap_cost; }
std::string
__advice() const
{ return "prefer an unordered container"; }
void
__record_insert(std::size_t __size, std::size_t __count)
{
++_M_insert;
if (__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;
if (__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;
_M_map_cost += __map_find_cost(__size);
_M_umap_cost += _GLIBCXX_PROFILE_DATA(__umap_find_cost_factor).__value;
}
void
__record_iterate(int __count)
{ __gnu_cxx::__atomic_add(&_M_iterate, __count); }
void
__set_iterate_costs()
{
_M_umap_cost
+= (_M_iterate
* _GLIBCXX_PROFILE_DATA(__umap_iterate_cost_factor).__value);
_M_map_cost
+= (_M_iterate
* _GLIBCXX_PROFILE_DATA(__map_iterate_cost_factor).__value);
}
private:
std::size_t _M_insert;
std::size_t _M_erase;
std::size_t _M_find;
mutable _Atomic_word _M_iterate;
float _M_umap_cost;
float _M_map_cost;
};
/** @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 = "ordered-to-unordered"; }
// Call at destruction/clean to set container final size.
void
__destruct(__map2umap_info* __obj_info)
{
__obj_info->__set_iterate_costs();
__retire_object(__obj_info);
}
};
inline void
__trace_map_to_unordered_map_init()
{ _GLIBCXX_PROFILE_DATA(_S_map2umap) = new __trace_map2umap(); }
inline void
__trace_map_to_unordered_map_free()
{ delete _GLIBCXX_PROFILE_DATA(_S_map2umap); }
inline void
__trace_map_to_unordered_map_report(FILE* __f,
__warning_vector_t& __warnings)
{ __trace_report(_GLIBCXX_PROFILE_DATA(_S_map2umap), __f, __warnings); }
inline __map2umap_info*
__trace_map_to_unordered_map_construct()
{
if (!__profcxx_init())
return 0;
if (!__reentrance_guard::__get_in())
return 0;
__reentrance_guard __get_out;
return _GLIBCXX_PROFILE_DATA(_S_map2umap)->__add_object(__get_stack());
}
inline void
__trace_map_to_unordered_map_insert(__map2umap_info* __info,
std::size_t __size, std::size_t __count)
{
if (!__info)
return;
__info->__record_insert(__size, __count);
}
inline void
__trace_map_to_unordered_map_erase(__map2umap_info* __info,
std::size_t __size, std::size_t __count)
{
if (!__info)
return;
__info->__record_erase(__size, __count);
}
inline void
__trace_map_to_unordered_map_find(__map2umap_info* __info,
std::size_t __size)
{
if (!__info)
return;
__info->__record_find(__size);
}
inline void
__trace_map_to_unordered_map_iterate(__map2umap_info* __info,
int)
{
if (!__info)
return;
// We only collect if an iteration took place no matter in what side.
__info->__record_iterate(1);
}
inline void
__trace_map_to_unordered_map_invalidate(__map2umap_info* __info)
{
if (!__info)
return;
__info->__set_invalid();
}
inline void
__trace_map_to_unordered_map_destruct(__map2umap_info* __info)
{
if (!__info)
return;
_GLIBCXX_PROFILE_DATA(_S_map2umap)->__destruct(__info);
}
} // namespace __gnu_profile
#endif /* _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H */
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