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// -*- C++ -*-

//

// Copyright (C) 2009-2013 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_node.h

 *  @brief Data structures to represent a single profiling event.

 */

// Written by Lixia Liu and Silvius Rus.

#ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H

#define _GLIBCXX_PROFILE_PROFILER_NODE_H 1

#include  // FILE, fprintf

#include 

#if defined _GLIBCXX_HAVE_EXECINFO_H

#include 

#endif

namespace __gnu_profile

{

  typedef const void* __object_t;

  typedef void* __instruction_address_t;

  typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt;

  typedef __stack_npt* __stack_t;

  std::size_t __stack_max_depth();

  inline __stack_t

  __get_stack()

  {

#if defined _GLIBCXX_HAVE_EXECINFO_H

    std::size_t __max_depth = __stack_max_depth();

    if (__max_depth == 0)

      return 0;

    __stack_npt __buffer(__max_depth);

    int __depth = backtrace(&__buffer[0], __max_depth);

    __stack_t __stack = new __stack_npt(__depth);

    __builtin_memcpy(&(*__stack)[0], &__buffer[0],

		     __depth * sizeof(__object_t));

    return __stack;

#else

    return 0;

#endif

  }

  inline std::size_t

  __size(__stack_t __stack)

  {

    if (!__stack)

      return 0;

    else

      return __stack->size();

  }

  // XXX

  inline void

  __write(FILE* __f, __stack_t __stack)

  {

    if (!__stack)

      return;

    __stack_npt::const_iterator __it;

    for (__it = __stack->begin(); __it != __stack->end(); ++__it)

      std::fprintf(__f, "%p ", *__it);

  }

  /** @brief Hash function for summary trace using call stack as index.  */

  class __stack_hash

  {

  public:

    std::size_t

    operator()(__stack_t __s) const

    {

      if (!__s)

	return 0;

      std::size_t __index = 0;

      __stack_npt::const_iterator __it;

      for (__it = __s->begin(); __it != __s->end(); ++__it)

	__index += reinterpret_cast(*__it);

      return __index;

    }

    bool operator() (__stack_t __stack1, __stack_t __stack2) const

    {

      if (!__stack1 && !__stack2)

	return true;

      if (!__stack1 || !__stack2)

	return false;

      if (__stack1->size() != __stack2->size())

	return false;

      std::size_t __byte_size

	= __stack1->size() * sizeof(__stack_npt::value_type);

      return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0],

			      __byte_size) == 0;

    }

  };

  /** @brief Base class for a line in the object table.  */

  class __object_info_base

  {

  public:

    __object_info_base() { }

    __object_info_base(__stack_t __stack)

    : _M_stack(__stack), _M_valid(true) { }

    __object_info_base(const __object_info_base& __o)

    : _M_stack(__o._M_stack), _M_valid(__o._M_valid) { }

    virtual ~__object_info_base() { }

    bool

    __is_valid() const

    { return _M_valid; }

    __stack_t

    __stack() const

    { return _M_stack; }

    virtual void __write(FILE* __f) const = 0;

  protected:

    __stack_t _M_stack;

    bool _M_valid;

  };

  /** @brief Base class for a line in the stack table.  */

  template

    class __stack_info_base

    {

    public:

      __stack_info_base() { }

      __stack_info_base(const __object_info& __info) = 0;

      virtual ~__stack_info_base() {}

      void __merge(const __object_info& __info) = 0;

      virtual float __magnitude() const = 0;

      virtual const char* __get_id() const = 0;

    };

} // namespace __gnu_profile

#endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */