LCOV - code coverage report
Current view: directory - tools/gcc-4.5/include/c++/4.5.2/ext - new_allocator.h (source / functions) Found Hit Coverage
Test: app.info Lines: 16 15 93.8 %
Date: 2012-06-02 Functions: 1077 303 28.1 %

       1                 : // Allocator that wraps operator new -*- C++ -*-
       2                 : 
       3                 : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2009
       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 <new>
      34                 : #include <bits/functexcept.h>
      35                 : #include <bits/move.h>
      36                 : 
      37                 : _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
      38                 : 
      39                 :   using std::size_t;
      40                 :   using std::ptrdiff_t;
      41                 : 
      42                 :   /**
      43                 :    *  @brief  An allocator that uses global new, as per [20.4].
      44                 :    *  @ingroup allocators
      45                 :    *
      46                 :    *  This is precisely the allocator defined in the C++ Standard. 
      47                 :    *    - all allocation calls operator new
      48                 :    *    - all deallocation calls operator delete
      49                 :    */
      50                 :   template<typename _Tp>
      51                 :     class new_allocator
      52                 :     {
      53                 :     public:
      54                 :       typedef size_t     size_type;
      55                 :       typedef ptrdiff_t  difference_type;
      56                 :       typedef _Tp*       pointer;
      57                 :       typedef const _Tp* const_pointer;
      58                 :       typedef _Tp&       reference;
      59                 :       typedef const _Tp& const_reference;
      60                 :       typedef _Tp        value_type;
      61                 : 
      62                 :       template<typename _Tp1>
      63                 :         struct rebind
      64                 :         { typedef new_allocator<_Tp1> other; };
      65                 : 
      66         5752372 :       new_allocator() throw() { }
      67                 : 
      68         7021172 :       new_allocator(const new_allocator&) throw() { }
      69                 : 
      70                 :       template<typename _Tp1>
      71                 :         new_allocator(const new_allocator<_Tp1>&) throw() { }
      72                 : 
      73        15822273 :       ~new_allocator() throw() { }
      74                 : 
      75                 :       pointer
      76                 :       address(reference __x) const { return &__x; }
      77                 : 
      78                 :       const_pointer
      79                 :       address(const_reference __x) const { return &__x; }
      80                 : 
      81                 :       // NB: __n is permitted to be 0.  The C++ standard says nothing
      82                 :       // about what the return value is when __n == 0.
      83                 :       pointer
      84        19129705 :       allocate(size_type __n, const void* = 0)
      85                 :       { 
      86        19129705 :         if (__n > this->max_size())
      87               0 :           std::__throw_bad_alloc();
      88                 : 
      89        19277904 :         return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
      90                 :       }
      91                 : 
      92                 :       // __p is not permitted to be a null pointer.
      93                 :       void
      94        27682040 :       deallocate(pointer __p, size_type)
      95        27682040 :       { ::operator delete(__p); }
      96                 : 
      97                 :       size_type
      98        23657386 :       max_size() const throw() 
      99        23657386 :       { return size_t(-1) / sizeof(_Tp); }
     100                 : 
     101                 :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
     102                 :       // 402. wrong new expression in [some_] allocator::construct
     103                 :       void 
     104         9882337 :       construct(pointer __p, const _Tp& __val) 
     105         9882337 :       { ::new((void *)__p) _Tp(__val); }
     106                 : 
     107                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
     108                 :       template<typename... _Args>
     109                 :         void
     110        16777070 :         construct(pointer __p, _Args&&... __args)
     111        16777070 :         { ::new((void *)__p) _Tp(std::forward<_Args>(__args)...); }
     112                 : #endif
     113                 : 
     114                 :       void 
     115        25347344 :       destroy(pointer __p) { __p->~_Tp(); }
     116                 :     };
     117                 : 
     118                 :   template<typename _Tp>
     119                 :     inline bool
     120                 :     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     121                 :     { return true; }
     122                 :   
     123                 :   template<typename _Tp>
     124                 :     inline bool
     125                 :     operator!=(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
     126                 :     { return false; }
     127                 : 
     128                 : _GLIBCXX_END_NAMESPACE
     129                 : 
     130                 : #endif

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