stl_construct.h

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00001 // nonstandard construct and destroy functions -*- C++ -*-
00002 
00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
00004 // Free Software Foundation, Inc.
00005 //
00006 // This file is part of the GNU ISO C++ Library.  This library is free
00007 // software; you can redistribute it and/or modify it under the
00008 // terms of the GNU General Public License as published by the
00009 // Free Software Foundation; either version 2, or (at your option)
00010 // any later version.
00011 
00012 // This library is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 
00017 // You should have received a copy of the GNU General Public License along
00018 // with this library; see the file COPYING.  If not, write to the Free
00019 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
00020 // USA.
00021 
00022 // As a special exception, you may use this file as part of a free software
00023 // library without restriction.  Specifically, if other files instantiate
00024 // templates or use macros or inline functions from this file, or you compile
00025 // this file and link it with other files to produce an executable, this
00026 // file does not by itself cause the resulting executable to be covered by
00027 // the GNU General Public License.  This exception does not however
00028 // invalidate any other reasons why the executable file might be covered by
00029 // the GNU General Public License.
00030 
00031 /*
00032  *
00033  * Copyright (c) 1994
00034  * Hewlett-Packard Company
00035  *
00036  * Permission to use, copy, modify, distribute and sell this software
00037  * and its documentation for any purpose is hereby granted without fee,
00038  * provided that the above copyright notice appear in all copies and
00039  * that both that copyright notice and this permission notice appear
00040  * in supporting documentation.  Hewlett-Packard Company makes no
00041  * representations about the suitability of this software for any
00042  * purpose.  It is provided "as is" without express or implied warranty.
00043  *
00044  *
00045  * Copyright (c) 1996,1997
00046  * Silicon Graphics Computer Systems, Inc.
00047  *
00048  * Permission to use, copy, modify, distribute and sell this software
00049  * and its documentation for any purpose is hereby granted without fee,
00050  * provided that the above copyright notice appear in all copies and
00051  * that both that copyright notice and this permission notice appear
00052  * in supporting documentation.  Silicon Graphics makes no
00053  * representations about the suitability of this software for any
00054  * purpose.  It is provided "as is" without express or implied warranty.
00055  */
00056 
00057 /** @file stl_construct.h
00058  *  This is an internal header file, included by other library headers.
00059  *  You should not attempt to use it directly.
00060  */
00061 
00062 #ifndef _STL_CONSTRUCT_H
00063 #define _STL_CONSTRUCT_H 1
00064 
00065 #include <new>
00066 
00067 _GLIBCXX_BEGIN_NAMESPACE(std)
00068 
00069   /**
00070    * Constructs an object in existing memory by invoking an allocated
00071    * object's constructor with an initializer.
00072    */
00073   template<typename _T1, typename _T2>
00074     inline void
00075     _Construct(_T1* __p, const _T2& __value)
00076     {
00077       // _GLIBCXX_RESOLVE_LIB_DEFECTS
00078       // 402. wrong new expression in [some_]allocator::construct
00079       ::new(static_cast<void*>(__p)) _T1(__value);
00080     }
00081 
00082   /**
00083    * Destroy the object pointed to by a pointer type.
00084    */
00085   template<typename _Tp>
00086     inline void
00087     _Destroy(_Tp* __pointer)
00088     { __pointer->~_Tp(); }
00089 
00090   /**
00091    * Destroy a range of objects.  If the value_type of the object has
00092    * a trivial destructor, the compiler should optimize all of this
00093    * away, otherwise the objects' destructors must be invoked.
00094    */
00095   template<typename _ForwardIterator>
00096     inline void
00097     _Destroy(_ForwardIterator __first, _ForwardIterator __last)
00098     {
00099       typedef typename iterator_traits<_ForwardIterator>::value_type
00100                        _Value_type;
00101       if (!__has_trivial_destructor(_Value_type))
00102     for (; __first != __last; ++__first)
00103       std::_Destroy(&*__first);
00104     }
00105 
00106   /**
00107    * Destroy a range of objects using the supplied allocator.  For
00108    * nondefault allocators we do not optimize away invocation of 
00109    * destroy() even if _Tp has a trivial destructor.
00110    */
00111 
00112   template <typename _Tp> class allocator;
00113 
00114   template<typename _ForwardIterator, typename _Allocator>
00115     void
00116     _Destroy(_ForwardIterator __first, _ForwardIterator __last,
00117          _Allocator& __alloc)
00118     {
00119       for (; __first != __last; ++__first)
00120     __alloc.destroy(&*__first);
00121     }
00122 
00123   template<typename _ForwardIterator, typename _Tp>
00124     inline void
00125     _Destroy(_ForwardIterator __first, _ForwardIterator __last,
00126          allocator<_Tp>&)
00127     {
00128       _Destroy(__first, __last);
00129     }
00130 
00131 _GLIBCXX_END_NAMESPACE
00132 
00133 #endif /* _STL_CONSTRUCT_H */
00134 

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