189 lines
5.9 KiB
C++
189 lines
5.9 KiB
C++
// nonstandard construct and destroy functions -*- C++ -*-
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// Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996,1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file stl_construct.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _STL_CONSTRUCT_H
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#define _STL_CONSTRUCT_H 1
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#include <bits/cpp_type_traits.h>
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#include <new>
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_GLIBCXX_BEGIN_NAMESPACE(std)
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/**
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* @if maint
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* Constructs an object in existing memory by invoking an allocated
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* object's constructor with an initializer.
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* @endif
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*/
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template<typename _T1, typename _T2>
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inline void
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_Construct(_T1* __p, const _T2& __value)
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{
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 402. wrong new expression in [some_]allocator::construct
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::new(static_cast<void*>(__p)) _T1(__value);
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}
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/**
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* @if maint
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* Constructs an object in existing memory by invoking an allocated
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* object's default constructor (no initializers).
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* @endif
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*/
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template<typename _T1>
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inline void
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_Construct(_T1* __p)
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{
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 402. wrong new expression in [some_]allocator::construct
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::new(static_cast<void*>(__p)) _T1();
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}
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/**
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* @if maint
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* Destroy the object pointed to by a pointer type.
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* @endif
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*/
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template<typename _Tp>
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inline void
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_Destroy(_Tp* __pointer)
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{ __pointer->~_Tp(); }
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/**
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* @if maint
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* Destroy a range of objects with nontrivial destructors.
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*
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* This is a helper function used only by _Destroy().
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* @endif
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*/
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template<typename _ForwardIterator>
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inline void
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__destroy_aux(_ForwardIterator __first, _ForwardIterator __last,
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__false_type)
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{
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for (; __first != __last; ++__first)
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std::_Destroy(&*__first);
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}
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/**
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* @if maint
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* Destroy a range of objects with trivial destructors. Since the destructors
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* are trivial, there's nothing to do and hopefully this function will be
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* entirely optimized away.
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*
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* This is a helper function used only by _Destroy().
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* @endif
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*/
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template<typename _ForwardIterator>
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inline void
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__destroy_aux(_ForwardIterator, _ForwardIterator, __true_type)
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{ }
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/**
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* @if maint
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* Destroy a range of objects. If the value_type of the object has
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* a trivial destructor, the compiler should optimize all of this
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* away, otherwise the objects' destructors must be invoked.
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* @endif
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*/
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template<typename _ForwardIterator>
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inline void
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_Destroy(_ForwardIterator __first, _ForwardIterator __last)
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{
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typedef typename iterator_traits<_ForwardIterator>::value_type
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_Value_type;
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typedef typename std::__is_scalar<_Value_type>::__type
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_Has_trivial_destructor;
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std::__destroy_aux(__first, __last, _Has_trivial_destructor());
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}
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/**
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* @if maint
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* Destroy a range of objects using the supplied allocator. For
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* nondefault allocators we do not optimize away invocation of
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* destroy() even if _Tp has a trivial destructor.
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* @endif
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*/
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template <typename _Tp> class allocator;
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template<typename _ForwardIterator, typename _Allocator>
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void
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_Destroy(_ForwardIterator __first, _ForwardIterator __last,
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_Allocator __alloc)
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{
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for (; __first != __last; ++__first)
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__alloc.destroy(&*__first);
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}
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template<typename _ForwardIterator, typename _Tp>
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inline void
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_Destroy(_ForwardIterator __first, _ForwardIterator __last,
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allocator<_Tp>)
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{
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_Destroy(__first, __last);
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}
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_GLIBCXX_END_NAMESPACE
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#endif /* _STL_CONSTRUCT_H */
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