mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-02 18:53:22 +00:00
154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
// <memory> -*- C++ -*-
|
|
|
|
// Copyright (C) 2001-2017 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
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/*
|
|
* 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 <bits/stl_algobase.h>
|
|
#include <bits/allocator.h>
|
|
#include <bits/stl_construct.h>
|
|
#include <bits/stl_uninitialized.h>
|
|
#include <bits/stl_tempbuf.h>
|
|
#include <bits/stl_raw_storage_iter.h>
|
|
|
|
#if __cplusplus >= 201103L
|
|
# include <exception> // std::exception
|
|
# include <typeinfo> // std::type_info in get_deleter
|
|
# include <iosfwd> // std::basic_ostream
|
|
# include <ext/atomicity.h>
|
|
# include <ext/concurrence.h>
|
|
# include <bits/functexcept.h>
|
|
# include <bits/stl_function.h> // std::less
|
|
# include <bits/uses_allocator.h>
|
|
# include <type_traits>
|
|
# include <debug/debug.h>
|
|
# include <bits/unique_ptr.h>
|
|
# include <bits/shared_ptr.h>
|
|
# include <bits/shared_ptr_atomic.h>
|
|
# if _GLIBCXX_USE_DEPRECATED
|
|
# include <backward/auto_ptr.h>
|
|
# endif
|
|
#else
|
|
# include <backward/auto_ptr.h>
|
|
#endif
|
|
|
|
#if __cplusplus >= 201103L
|
|
# include <cstdint>
|
|
# 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<uintptr_t>(__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<void*>(__aligned);
|
|
}
|
|
}
|
|
|
|
// 20.7.4 [util.dynamic.safety], pointer safety
|
|
|
|
enum class pointer_safety { relaxed, preferred, strict };
|
|
|
|
inline void
|
|
declare_reachable(void*) { }
|
|
|
|
template <typename _Tp>
|
|
inline _Tp*
|
|
undeclare_reachable(_Tp* __p) { return __p; }
|
|
|
|
inline void
|
|
declare_no_pointers(char*, size_t) { }
|
|
|
|
inline void
|
|
undeclare_no_pointers(char*, size_t) { }
|
|
|
|
inline pointer_safety
|
|
get_pointer_safety() noexcept { return pointer_safety::relaxed; }
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
#endif // _GLIBCXX_USE_C99_STDINT_TR1
|
|
#endif // C++11
|
|
|
|
#endif /* _GLIBCXX_MEMORY */
|