LTP GCOV extension - code coverage report
Current view: | directory - usr/include/c++/4.3/ext - new_allocator.h
Test: | lcov.info
Date: | 2008-08-14 |  | Instrumented lines: | 14
Code covered: | 92.9 % |  | Executed lines: | 13

           1                 : // Allocator that wraps operator new -*- C++ -*-
           2                 :
           3                 : // Copyright (C) 2001, 2002, 2003, 2004, 2005 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 2, 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                 : // You should have received a copy of the GNU General Public License along
          17                 : // with this library; see the file COPYING.  If not, write to the Free
          18                 : // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
          19                 : // USA.
          20                 :
          21                 : // As a special exception, you may use this file as part of a free software
          22                 : // library without restriction.  Specifically, if other files instantiate
          23                 : // templates or use macros or inline functions from this file, or you compile
          24                 : // this file and link it with other files to produce an executable, this
          25                 : // file does not by itself cause the resulting executable to be covered by
          26                 : // the GNU General Public License.  This exception does not however
          27                 : // invalidate any other reasons why the executable file might be covered by
          28                 : // the GNU General Public License.
          29                 :
          30                 : /** @file ext/new_allocator.h
          31                 :  *  This file is a GNU extension to the Standard C++ Library.
          32                 :  */
          33                 :
          34                 : #ifndef _NEW_ALLOCATOR_H
          35                 : #define _NEW_ALLOCATOR_H 1
          36                 :
          37                 : #include <new>
          38                 : #include <bits/functexcept.h>
          39                 : #include <bits/stl_move.h>
          40                 :
          41                 : _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
          42                 :
          43                 :   using std::size_t;
          44                 :   using std::ptrdiff_t;
          45                 :
          46                 :   /**
          47                 :    *  @brief  An allocator that uses global new, as per [20.4].
          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        11574945 :       new_allocator() throw() { }
          70                 :
          71          934618 :       new_allocator(const new_allocator&) throw() { }
          72                 :
          73                 :       template<typename _Tp1>
          74                 :         new_allocator(const new_allocator<_Tp1>&) throw() { }
          75                 :
          76        12615289 :       ~new_allocator() throw() { }
          77                 :
          78                 :       pointer
          79                 :       address(reference __x) const { return &__x; }
          80                 :
          81                 :       const_pointer
          82                 :       address(const_reference __x) const { return &__x; }
          83                 :
          84                 :       // NB: __n is permitted to be 0.  The C++ standard says nothing
          85                 :       // about what the return value is when __n == 0.
          86                 :       pointer
          87         5665535 :       allocate(size_type __n, const void* = 0)
          88                 :       {
          89         5665535 :         if (__builtin_expect(__n > this->max_size(), false))
          90               0 :           std::__throw_bad_alloc();
          91                 :
          92         5665535 :         return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
          93                 :       }
          94                 :
          95                 :       // __p is not permitted to be a null pointer.
          96                 :       void
          97         5665395 :       deallocate(pointer __p, size_type)
          98         5665395 :       { ::operator delete(__p); }
          99                 :
         100                 :       size_type
         101         5706963 :       max_size() const throw()
         102         5706963 :       { return size_t(-1) / sizeof(_Tp); }
         103                 :
         104                 :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
         105                 :       // 402. wrong new expression in [some_] allocator::construct
         106                 :       void
         107         5786312 :       construct(pointer __p, const _Tp& __val)
         108         5786312 :       { ::new((void *)__p) _Tp(__val); }
         109                 :
         110                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
         111                 :       template<typename... _Args>
         112                 :         void
         113                 :         construct(pointer __p, _Args&&... __args)
         114                 :         { ::new((void *)__p) _Tp(std::forward<_Args>(__args)...); }
         115                 : #endif
         116                 :
         117                 :       void
         118         5644734 :       destroy(pointer __p) { __p->~_Tp(); }
         119                 :     };
         120                 :
         121                 :   template<typename _Tp>
         122                 :     inline bool
         123                 :     operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
         124                 :     { return true; }
         125                 :
         126                 :   template<typename _Tp>
         127                 :     inline bool
         128                 :     operator!=(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
         129                 :     { return false; }
         130                 :
         131                 : _GLIBCXX_END_NAMESPACE
         132                 :
         133                 : #endif

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