Subversion Repositories Kolibri OS

// -*- C++ -*-

//

// Copyright (C) 2009-2015 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

// .

/** @file profile/impl/profiler_hash_func.h

 *  @brief Data structures to represent profiling traces.

 */

// Written by Lixia Liu and Silvius Rus.

#ifndef _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H

#define _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 1

#include "profile/impl/profiler.h"

#include "profile/impl/profiler_node.h"

#include "profile/impl/profiler_trace.h"

namespace __gnu_profile

{

  /** @brief A hash performance instrumentation line in the object table.  */

  class __hashfunc_info

  : public __object_info_base

  {

  public:

    __hashfunc_info(__stack_t __stack)

    : __object_info_base(__stack), _M_longest_chain(0),

      _M_accesses(0), _M_hops(0) { }

    void

    __merge(const __hashfunc_info& __o)

    {

      __object_info_base::__merge(__o);

      _M_longest_chain  = std::max(_M_longest_chain, __o._M_longest_chain);

      _M_accesses      += __o._M_accesses;

      _M_hops          += __o._M_hops;

    }

    void

    __destruct(std::size_t __chain, std::size_t __accesses,

	       std::size_t __hops)

    {

      _M_longest_chain  = std::max(_M_longest_chain, __chain);

      _M_accesses      += __accesses;

      _M_hops          += __hops;

    }

    void

    __write(FILE* __f) const

    { std::fprintf(__f, "%Zu %Zu %Zu\n", _M_hops,

		   _M_accesses, _M_longest_chain); }

    float

    __magnitude() const

    { return static_cast(_M_hops); }

    std::string

    __advice() const

    { return "change hash function"; }

  private:

    std::size_t _M_longest_chain;

    std::size_t _M_accesses;

    std::size_t _M_hops;

  };

  /** @brief A hash performance instrumentation line in the stack table.  */

  class __hashfunc_stack_info

  : public __hashfunc_info

  {

  public:

    __hashfunc_stack_info(const __hashfunc_info& __o)

    : __hashfunc_info(__o) { }

  };

  /** @brief Hash performance instrumentation producer.  */

  class __trace_hash_func

  : public __trace_base<__hashfunc_info, __hashfunc_stack_info>

  {

  public:

    __trace_hash_func()

    : __trace_base<__hashfunc_info, __hashfunc_stack_info>()

    { __id = "hash-distr"; }

    ~__trace_hash_func() {}

    // Call at destruction/clean to set container final size.

    void

    __destruct(__hashfunc_info* __obj_info,

	       std::size_t __chain, std::size_t __accesses, std::size_t __hops)

    {

      if (!__obj_info)

	return;

      __obj_info->__destruct(__chain, __accesses, __hops);

      __retire_object(__obj_info);

    }

  };

  inline void

  __trace_hash_func_init()

  { _GLIBCXX_PROFILE_DATA(_S_hash_func) = new __trace_hash_func(); }

  inline void

  __trace_hash_func_free()

  { delete _GLIBCXX_PROFILE_DATA(_S_hash_func); }

  inline void

  __trace_hash_func_report(FILE* __f, __warning_vector_t& __warnings)

  { __trace_report(_GLIBCXX_PROFILE_DATA(_S_hash_func), __f, __warnings); }

  inline __hashfunc_info*

  __trace_hash_func_construct()

  {

    if (!__profcxx_init())

      return 0;

    if (!__reentrance_guard::__get_in())

      return 0;

    __reentrance_guard __get_out;

    return _GLIBCXX_PROFILE_DATA(_S_hash_func)->__add_object(__get_stack());

  }

  inline void

  __trace_hash_func_destruct(__hashfunc_info* __obj_info,

			     std::size_t __chain, std::size_t __accesses,

			     std::size_t __hops)

  {

    _GLIBCXX_PROFILE_DATA(_S_hash_func)->__destruct(__obj_info, __chain,

						    __accesses, __hops);

  }

} // namespace __gnu_profile

#endif /* _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H */