LCOV - code coverage report
Current view: top level - ext - new_allocator.h (source / functions) Hit Total Coverage
Test: stap.info Lines: 13 14 92.9 %
Date: 2013-03-08 Functions: 880 1040 84.6 %
Branches: 122 344 35.5 %

           Branch data     Line data    Source code
       1                 :            : // Allocator that wraps operator new -*- C++ -*-
       2                 :            : 
       3                 :            : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2009, 2010
       4                 :            : // Free Software Foundation, Inc.
       5                 :            : //
       6                 :            : // This file is part of the GNU ISO C++ Library.  This library is free
       7                 :            : // software; you can redistribute it and/or modify it under the
       8                 :            : // terms of the GNU General Public License as published by the
       9                 :            : // Free Software Foundation; either version 3, or (at your option)
      10                 :            : // any later version.
      11                 :            : 
      12                 :            : // This library is distributed in the hope that it will be useful,
      13                 :            : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      14                 :            : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15                 :            : // GNU General Public License for more details.
      16                 :            : 
      17                 :            : // Under Section 7 of GPL version 3, you are granted additional
      18                 :            : // permissions described in the GCC Runtime Library Exception, version
      19                 :            : // 3.1, as published by the Free Software Foundation.
      20                 :            : 
      21                 :            : // You should have received a copy of the GNU General Public License and
      22                 :            : // a copy of the GCC Runtime Library Exception along with this program;
      23                 :            : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24                 :            : // <http://www.gnu.org/licenses/>.
      25                 :            : 
      26                 :            : /** @file ext/new_allocator.h
      27                 :            :  *  This file is a GNU extension to the Standard C++ Library.
      28                 :            :  */
      29                 :            : 
      30                 :            : #ifndef _NEW_ALLOCATOR_H
      31                 :            : #define _NEW_ALLOCATOR_H 1
      32                 :            : 
      33                 :            : #include <bits/c++config.h>
      34                 :            : #include <new>
      35                 :            : #include <bits/functexcept.h>
      36                 :            : #include <bits/move.h>
      37                 :            : 
      38                 :            : namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
      39                 :            : {
      40                 :            : _GLIBCXX_BEGIN_NAMESPACE_VERSION
      41                 :            : 
      42                 :            :   using std::size_t;
      43                 :            :   using std::ptrdiff_t;
      44                 :            : 
      45                 :            :   /**
      46                 :            :    *  @brief  An allocator that uses global new, as per [20.4].
      47                 :            :    *  @ingroup allocators
      48                 :            :    *
      49                 :            :    *  This is precisely the allocator defined in the C++ Standard. 
      50                 :            :    *    - all allocation calls operator new
      51                 :            :    *    - all deallocation calls operator delete
      52                 :            :    */
      53                 :            :   template<typename _Tp>
      54                 :            :     class new_allocator
      55                 :            :     {
      56                 :            :     public:
      57                 :            :       typedef size_t     size_type;
      58                 :            :       typedef ptrdiff_t  difference_type;
      59                 :            :       typedef _Tp*       pointer;
      60                 :            :       typedef const _Tp* const_pointer;
      61                 :            :       typedef _Tp&       reference;
      62                 :            :       typedef const _Tp& const_reference;
      63                 :            :       typedef _Tp        value_type;
      64                 :            : 
      65                 :            :       template<typename _Tp1>
      66                 :            :         struct rebind
      67                 :            :         { typedef new_allocator<_Tp1> other; };
      68                 :            : 
      69                 :  686486311 :       new_allocator() _GLIBCXX_USE_NOEXCEPT { }
      70                 :            : 
      71                 :    8520937 :       new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }
      72                 :            : 
      73                 :            :       template<typename _Tp1>
      74                 :            :         new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }
      75                 :            : 
      76                 :  616936469 :       ~new_allocator() _GLIBCXX_USE_NOEXCEPT { }
      77                 :            : 
      78                 :            :       pointer
      79                 :            :       address(reference __x) const _GLIBCXX_NOEXCEPT
      80                 :            :       { return std::__addressof(__x); }
      81                 :            : 
      82                 :            :       const_pointer
      83                 :            :       address(const_reference __x) const _GLIBCXX_NOEXCEPT
      84                 :            :       { return std::__addressof(__x); }
      85                 :            : 
      86                 :            :       // NB: __n is permitted to be 0.  The C++ standard says nothing
      87                 :            :       // about what the return value is when __n == 0.
      88                 :            :       pointer
      89                 :  472713544 :       allocate(size_type __n, const void* = 0)
      90                 :            :       { 
      91 [ -  + ][ -  + ]:  472713544 :         if (__n > this->max_size())
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      92                 :          0 :           std::__throw_bad_alloc();
      93                 :            : 
      94                 :  472713545 :         return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
      95                 :            :       }
      96                 :            : 
      97                 :            :       // __p is not permitted to be a null pointer.
      98                 :            :       void
      99                 :  420825621 :       deallocate(pointer __p, size_type)
     100                 :  420825621 :       { ::operator delete(__p); }
     101                 :            : 
     102                 :            :       size_type
     103                 :  881947240 :       max_size() const _GLIBCXX_USE_NOEXCEPT
     104                 :  881947240 :       { return size_t(-1) / sizeof(_Tp); }
     105                 :            : 
     106                 :            : #ifdef __GXX_EXPERIMENTAL_CXX0X__
     107                 :            :       template<typename _Up, typename... _Args>
     108                 :            :         void
     109                 :            :         construct(_Up* __p, _Args&&... __args)
     110                 :            :         { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
     111                 :            : 
     112                 :            :       template<typename _Up>
     113                 :            :         void 
     114                 :            :         destroy(_Up* __p) { __p->~_Up(); }
     115                 :            : #else
     116                 :            :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
     117                 :            :       // 402. wrong new expression in [some_] allocator::construct
     118                 :            :       void 
     119                 :  548087357 :       construct(pointer __p, const _Tp& __val) 
     120 [ +  - ][ +  - ]:  548087357 :       { ::new((void *)__p) _Tp(__val); }
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     121                 :            : 
     122                 :            :       void 
     123                 :  304943508 :       destroy(pointer __p) { __p->~_Tp(); }
     124                 :            : #endif
     125                 :            :     };
     126                 :            : 
     127                 :            :   template<typename _Tp>
     128                 :            :     inline bool
     129                 :            :     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     130                 :            :     { return true; }
     131                 :            :   
     132                 :            :   template<typename _Tp>
     133                 :            :     inline bool
     134                 :            :     operator!=(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     135                 :            :     { return false; }
     136                 :            : 
     137                 :            : _GLIBCXX_END_NAMESPACE_VERSION
     138                 :            : } // namespace
     139                 :            : 
     140                 :            : #endif

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