LCOV - code coverage report
Current view: top level - usr/include/c++/6/bits - stl_construct.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 15 15 100.0 %
Date: 2018-11-14 16:53:58 Functions: 66 129 51.2 %

          Line data    Source code
       1             : // nonstandard construct and destroy functions -*- C++ -*-
       2             : 
       3             : // Copyright (C) 2001-2016 Free Software Foundation, Inc.
       4             : //
       5             : // This file is part of the GNU ISO C++ Library.  This library is free
       6             : // software; you can redistribute it and/or modify it under the
       7             : // terms of the GNU General Public License as published by the
       8             : // Free Software Foundation; either version 3, or (at your option)
       9             : // any later version.
      10             : 
      11             : // This library is distributed in the hope that it will be useful,
      12             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             : // GNU General Public License for more details.
      15             : 
      16             : // Under Section 7 of GPL version 3, you are granted additional
      17             : // permissions described in the GCC Runtime Library Exception, version
      18             : // 3.1, as published by the Free Software Foundation.
      19             : 
      20             : // You should have received a copy of the GNU General Public License and
      21             : // a copy of the GCC Runtime Library Exception along with this program;
      22             : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      23             : // <http://www.gnu.org/licenses/>.
      24             : 
      25             : /*
      26             :  *
      27             :  * Copyright (c) 1994
      28             :  * Hewlett-Packard Company
      29             :  *
      30             :  * Permission to use, copy, modify, distribute and sell this software
      31             :  * and its documentation for any purpose is hereby granted without fee,
      32             :  * provided that the above copyright notice appear in all copies and
      33             :  * that both that copyright notice and this permission notice appear
      34             :  * in supporting documentation.  Hewlett-Packard Company makes no
      35             :  * representations about the suitability of this software for any
      36             :  * purpose.  It is provided "as is" without express or implied warranty.
      37             :  *
      38             :  *
      39             :  * Copyright (c) 1996,1997
      40             :  * Silicon Graphics Computer Systems, Inc.
      41             :  *
      42             :  * Permission to use, copy, modify, distribute and sell this software
      43             :  * and its documentation for any purpose is hereby granted without fee,
      44             :  * provided that the above copyright notice appear in all copies and
      45             :  * that both that copyright notice and this permission notice appear
      46             :  * in supporting documentation.  Silicon Graphics makes no
      47             :  * representations about the suitability of this software for any
      48             :  * purpose.  It is provided "as is" without express or implied warranty.
      49             :  */
      50             : 
      51             : /** @file bits/stl_construct.h
      52             :  *  This is an internal header file, included by other library headers.
      53             :  *  Do not attempt to use it directly. @headername{memory}
      54             :  */
      55             : 
      56             : #ifndef _STL_CONSTRUCT_H
      57             : #define _STL_CONSTRUCT_H 1
      58             : 
      59             : #include <new>
      60             : #include <bits/move.h>
      61             : #include <ext/alloc_traits.h>
      62             : 
      63             : namespace std _GLIBCXX_VISIBILITY(default)
      64             : {
      65             : _GLIBCXX_BEGIN_NAMESPACE_VERSION
      66             : 
      67             :   /**
      68             :    * Constructs an object in existing memory by invoking an allocated
      69             :    * object's constructor with an initializer.
      70             :    */
      71             : #if __cplusplus >= 201103L
      72             :   template<typename _T1, typename... _Args>
      73             :     inline void
      74       11322 :     _Construct(_T1* __p, _Args&&... __args)
      75       11322 :     { ::new(static_cast<void*>(__p)) _T1(std::forward<_Args>(__args)...); }
      76             : #else
      77             :   template<typename _T1, typename _T2>
      78             :     inline void
      79             :     _Construct(_T1* __p, const _T2& __value)
      80             :     {
      81             :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
      82             :       // 402. wrong new expression in [some_]allocator::construct
      83             :       ::new(static_cast<void*>(__p)) _T1(__value);
      84             :     }
      85             : #endif
      86             : 
      87             :   /**
      88             :    * Destroy the object pointed to by a pointer type.
      89             :    */
      90             :   template<typename _Tp>
      91             :     inline void
      92       17301 :     _Destroy(_Tp* __pointer)
      93       17301 :     { __pointer->~_Tp(); }
      94             : 
      95             :   template<bool>
      96             :     struct _Destroy_aux
      97             :     {
      98             :       template<typename _ForwardIterator>
      99             :         static void
     100       19560 :         __destroy(_ForwardIterator __first, _ForwardIterator __last)
     101             :         {
     102       36861 :           for (; __first != __last; ++__first)
     103       17301 :             std::_Destroy(std::__addressof(*__first));
     104        2259 :         }
     105             :     };
     106             : 
     107             :   template<>
     108             :     struct _Destroy_aux<true>
     109             :     {
     110             :       template<typename _ForwardIterator>
     111             :         static void
     112        5586 :         __destroy(_ForwardIterator, _ForwardIterator) { }
     113             :     };
     114             : 
     115             :   /**
     116             :    * Destroy a range of objects.  If the value_type of the object has
     117             :    * a trivial destructor, the compiler should optimize all of this
     118             :    * away, otherwise the objects' destructors must be invoked.
     119             :    */
     120             :   template<typename _ForwardIterator>
     121             :     inline void
     122        7845 :     _Destroy(_ForwardIterator __first, _ForwardIterator __last)
     123             :     {
     124             :       typedef typename iterator_traits<_ForwardIterator>::value_type
     125             :                        _Value_type;
     126        7845 :       std::_Destroy_aux<__has_trivial_destructor(_Value_type)>::
     127             :         __destroy(__first, __last);
     128        7845 :     }
     129             : 
     130             :   /**
     131             :    * Destroy a range of objects using the supplied allocator.  For
     132             :    * nondefault allocators we do not optimize away invocation of 
     133             :    * destroy() even if _Tp has a trivial destructor.
     134             :    */
     135             : 
     136             :   template<typename _ForwardIterator, typename _Allocator>
     137             :     void
     138             :     _Destroy(_ForwardIterator __first, _ForwardIterator __last,
     139             :              _Allocator& __alloc)
     140             :     {
     141             :       typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
     142             :       for (; __first != __last; ++__first)
     143             :         __traits::destroy(__alloc, std::__addressof(*__first));
     144             :     }
     145             : 
     146             :   template<typename _ForwardIterator, typename _Tp>
     147             :     inline void
     148        7845 :     _Destroy(_ForwardIterator __first, _ForwardIterator __last,
     149             :              allocator<_Tp>&)
     150             :     {
     151        7845 :       _Destroy(__first, __last);
     152        7845 :     }
     153             : 
     154             : _GLIBCXX_END_NAMESPACE_VERSION
     155             : } // namespace std
     156             : 
     157             : #endif /* _STL_CONSTRUCT_H */
     158             : 

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