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//  -*- C++ -*-

// Copyright (C) 2001-2015 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 and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// .

/*

 * Copyright (c) 1997-1999

 * Silicon Graphics Computer Systems, Inc.

 *

 * Permission to use, copy, modify, distribute and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appear in all copies and

 * that both that copyright notice and this permission notice appear

 * in supporting documentation.  Silicon Graphics makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 */

/** @file include/memory

 *  This is a Standard C++ Library header.

 */

#ifndef _GLIBCXX_MEMORY

#define _GLIBCXX_MEMORY 1

#pragma GCC system_header

/**

 * @defgroup memory Memory

 * @ingroup utilities

 *

 * Components for memory allocation, deallocation, and management.

 */

/**

 * @defgroup pointer_abstractions Pointer Abstractions

 * @ingroup memory

 *

 * Smart pointers, etc.

 */

#include 

#include 

#include 

#include 

#include 

#include 

#if __cplusplus >= 201103L

#  include         	  // std::exception

#  include          	  // std::type_info in get_deleter

#  include            	  // std::basic_ostream

#  include 

#  include 

#  include 

#  include   // std::less

#  include 

#  include 

#  include 

#  include 

#  include 

#  include 

#  include 

#  if _GLIBCXX_USE_DEPRECATED

#    include 

#  endif

#else

#  include 

#endif

#if __cplusplus >= 201103L

#  include 

#  ifdef _GLIBCXX_USE_C99_STDINT_TR1

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**

 *  @brief Fit aligned storage in buffer.

 *

 *  [ptr.align]

 *

 *  This function tries to fit @a __size bytes of storage with alignment

 *  @a __align into the buffer @a __ptr of size @a __space bytes.  If such

 *  a buffer fits then @a __ptr is changed to point to the first byte of the

 *  aligned storage and @a __space is reduced by the bytes used for alignment.

 *

 *  @param __align   A fundamental or extended alignment value.

 *  @param __size    Size of the aligned storage required.

 *  @param __ptr     Pointer to a buffer of @a __space bytes.

 *  @param __space   Size of the buffer pointed to by @a __ptr.

 *  @return the updated pointer if the aligned storage fits, otherwise nullptr.

 */

inline void*

align(size_t __align, size_t __size, void*& __ptr, size_t& __space) noexcept

{

  const auto __intptr = reinterpret_cast(__ptr);

  const auto __aligned = (__intptr - 1u + __align) & -__align;

  const auto __diff = __aligned - __intptr;

  if ((__size + __diff) > __space)

    return nullptr;

  else

    {

      __space -= __diff;

      return __ptr = reinterpret_cast(__aligned);

    }

}

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

#endif // _GLIBCXX_USE_C99_STDINT_TR1

#endif // C++11

#endif /* _GLIBCXX_MEMORY */