__gnu_cxx::bitmap_allocator

__gnu_cxx::bitmap_allocatorLibraryaFungnuocxx::bitmap_allocator< typename >(3)



NAME
       __gnu_cxx::bitmap_allocator< typename > -

SYNOPSIS
       Inherits __gnu_cxx::free_list.

   Public Types
       typedef free_list::__mutex_type __mutex_type
       typedef const _Tp * const_pointer
       typedef const _Tp & const_reference
       typedef ptrdiff_t difference_type
       typedef _Tp * pointer
       typedef std::true_type propagate_on_container_move_assignment
       typedef _Tp & reference
       typedef size_t size_type
       typedef _Tp value_type

   Public Member Functions
       bitmap_allocator (const bitmap_allocator &) noexcept
       template<typename _Tp1 > bitmap_allocator (const bitmap_allocator< _Tp1
           > &) noexcept
       pointer _M_allocate_single_object ()  throw (std::bad_alloc)
       void _M_deallocate_single_object (pointer __p)  throw ()
       pointer address (reference __r) const noexcept
       const_pointer address (const_reference __r) const noexcept
       pointer allocate (size_type __n)
       pointer allocate (size_type __n, typename bitmap_allocator< void
           >::const_pointer)
       template<typename _Up , typename... _Args> void construct (_Up *__p,
           _Args &&...__args)
       void deallocate (pointer __p, size_type __n)  throw ()
       template<typename _Up > void destroy (_Up *__p)
       size_type max_size () const noexcept

   Private Types
       typedef vector_type::iterator iterator
       typedef
           __detail::__mini_vector
           < value_type > vector_type"

   Private Member Functions
       void _M_clear ()
       size_t * _M_get (size_t __sz)  throw (std::bad_alloc)
       void _M_insert (size_t *__addr)  throw ()

Detailed Description
   template<typename>class __gnu_cxx::bitmap_allocator< typename >
       Bitmap Allocator, primary template.

       Definition at line 70 of file ext/alloc_traits.h.

Member Function Documentation
   template<typename > pointer __gnu_cxx::bitmap_allocator< typename
       >::_M_allocate_single_object ()std::bad_alloc [inline]
       Allocates memory for a single object of size sizeof(_Tp).

       Exceptions:
           std::bad_alloc. If memory can not be allocated.

       Complexity: Worst case complexity is O(N), but that is hardly ever hit.
       If and when this particular case is encountered, the next few cases are
       guaranteed to have a worst case complexity of O(1)! That's why this
       function performs very well on average. You can consider this function
       to have a complexity referred to commonly as: Amortized Constant time.

       Definition at line 827 of file bitmap_allocator.h.

       References __gnu_cxx::__detail::__bit_allocate(),
       __gnu_cxx::__detail::__num_bitmaps(), and
       __gnu_cxx::_Bit_scan_forward().

   template<typename > void __gnu_cxx::bitmap_allocator< typename
       >::_M_deallocate_single_object (pointer__p) [inline]
       Deallocates memory that belongs to a single object of size sizeof(_Tp).
       Complexity: O(lg(N)), but the worst case is not hit often! This is
       because containers usually deallocate memory close to each other and
       this case is handled in O(1) time by the deallocate function.

       Definition at line 917 of file bitmap_allocator.h.

       References __gnu_cxx::__detail::__bit_free(),
       __gnu_cxx::__detail::__num_bitmaps(), std::__rotate(), and
       __gnu_cxx::free_list::_M_insert().


Author
       Generated automatically by Doxygen for libstdc++ from the source code.



libstdc++                       Wed Apgnu4cxx::bitmap_allocator< typename >(3)