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__gnu_cxx::bitmap_allocator< _Tp >(3cxx) __gnu_cxx::bitmap_allocator< _Tp >(3cxx)

NAME

__gnu_cxx::bitmap_allocator< _Tp > - Bitmap Allocator, primary template.

SYNOPSIS

#include <bitmap_allocator.h>

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 std::ptrdiff_t difference_type
typedef _Tp * pointer
typedef std::true_type propagate_on_container_move_assignment
typedef _Tp & reference
typedef std::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 ()
Allocates memory for a single object of size sizeof(_Tp). void _M_deallocate_single_object (pointer __p) throw ()
Deallocates memory that belongs to a single object of size sizeof(_Tp). const_pointer address (const_reference __r) const noexcept
pointer address (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

Detailed Description

template<typename _Tp>

class __gnu_cxx::bitmap_allocator< _Tp >"Bitmap Allocator, primary template.

Definition at line 682 of file bitmap_allocator.h.

Member Typedef Documentation

template<typename _Tp > typedef free_list::__mutex_type __gnu_cxx::bitmap_allocator< _Tp >::__mutex_type

Definition at line 692 of file bitmap_allocator.h.

template<typename _Tp > typedef const _Tp* __gnu_cxx::bitmap_allocator< _Tp >::const_pointer

Definition at line 688 of file bitmap_allocator.h.

template<typename _Tp > typedef const _Tp& __gnu_cxx::bitmap_allocator< _Tp >::const_reference

Definition at line 690 of file bitmap_allocator.h.

template<typename _Tp > typedef std::ptrdiff_t __gnu_cxx::bitmap_allocator< _Tp >::difference_type

Definition at line 686 of file bitmap_allocator.h.

template<typename _Tp > typedef _Tp* __gnu_cxx::bitmap_allocator< _Tp >::pointer

Definition at line 687 of file bitmap_allocator.h.

template<typename _Tp > typedef std::true_type __gnu_cxx::bitmap_allocator< _Tp >::propagate_on_container_move_assignment

Definition at line 703 of file bitmap_allocator.h.

template<typename _Tp > typedef _Tp& __gnu_cxx::bitmap_allocator< _Tp >::reference

Definition at line 689 of file bitmap_allocator.h.

template<typename _Tp > typedef std::size_t __gnu_cxx::bitmap_allocator< _Tp >::size_type

Definition at line 685 of file bitmap_allocator.h.

template<typename _Tp > typedef _Tp __gnu_cxx::bitmap_allocator< _Tp >::value_type

Definition at line 691 of file bitmap_allocator.h.

Constructor & Destructor Documentation

template<typename _Tp > __gnu_cxx::bitmap_allocator< _Tp >::bitmap_allocator () [inline], [noexcept]

Definition at line 1000 of file bitmap_allocator.h.

template<typename _Tp > __gnu_cxx::bitmap_allocator< _Tp >::bitmap_allocator (const bitmap_allocator< _Tp > &) [inline], [noexcept]

Definition at line 1003 of file bitmap_allocator.h.

template<typename _Tp > template<typename _Tp1 > __gnu_cxx::bitmap_allocator< _Tp >::bitmap_allocator (const bitmap_allocator< _Tp1 > &) [inline], [noexcept]

Definition at line 1007 of file bitmap_allocator.h.

template<typename _Tp > __gnu_cxx::bitmap_allocator< _Tp >::~bitmap_allocator () [inline], [noexcept]

Definition at line 1010 of file bitmap_allocator.h.

Member Function Documentation

template<typename _Tp > pointer __gnu_cxx::bitmap_allocator< _Tp >::_M_allocate_single_object () [inline]

Allocates memory for a single object of size sizeof(_Tp).

Exceptions

std::bad_alloc. If memory cannot 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 823 of file bitmap_allocator.h.

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

template<typename _Tp > void __gnu_cxx::bitmap_allocator< _Tp >::_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 914 of file bitmap_allocator.h.

template<typename _Tp > const_pointer __gnu_cxx::bitmap_allocator< _Tp >::address (const_reference __r) const [inline], [noexcept]

Definition at line 1067 of file bitmap_allocator.h.

template<typename _Tp > pointer __gnu_cxx::bitmap_allocator< _Tp >::address (reference __r) const [inline], [noexcept]

Definition at line 1063 of file bitmap_allocator.h.

template<typename _Tp > pointer __gnu_cxx::bitmap_allocator< _Tp >::allocate (size_type __n) [inline]

Definition at line 1014 of file bitmap_allocator.h.

template<typename _Tp > pointer __gnu_cxx::bitmap_allocator< _Tp >::allocate (size_type __n, typename bitmap_allocator< void >::const_pointer) [inline]

Definition at line 1038 of file bitmap_allocator.h.

template<typename _Tp > template<typename _Up , typename... _Args> void __gnu_cxx::bitmap_allocator< _Tp >::construct (_Up * __p, _Args &&... __args) [inline]

Definition at line 1077 of file bitmap_allocator.h.

template<typename _Tp > void __gnu_cxx::bitmap_allocator< _Tp >::deallocate (pointer __p, size_type __n) [inline]

Definition at line 1042 of file bitmap_allocator.h.

template<typename _Tp > template<typename _Up > void __gnu_cxx::bitmap_allocator< _Tp >::destroy (_Up * __p) [inline]

Definition at line 1082 of file bitmap_allocator.h.

template<typename _Tp > size_type __gnu_cxx::bitmap_allocator< _Tp >::max_size () const [inline], [noexcept]

Definition at line 1071 of file bitmap_allocator.h.

Author

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Tue Jan 10 2023 libstdc++