jau::callocator< T > Struct Template Reference

A simple allocator using POSIX C functions: ::malloc(), ::free() and ::realloc(). More...

#include <callocator.hpp>

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Classes
struct	rebind

Public Types
typedef const T *	const_pointer
typedef const T &	const_reference
typedef std::ptrdiff_t	difference_type
typedef std::true_type	is_always_equal
typedef T *	pointer
typedef std::true_type	propagate_on_container_move_assignment
typedef T &	reference
typedef std::size_t	size_type
typedef T	value_type

Public Member Functions
	callocator () noexcept=default
	callocator (const callocator &) noexcept
template<typename U >
	callocator (const callocator< U > &) noexcept
	~callocator ()=default
value_type *	allocate (std::size_t n)
value_type *	allocate (std::size_t n, const void *)
void	deallocate (value_type *p, std::size_t)
constexpr value_type *	reallocate (value_type *p, std::size_t, std::size_t new_size)

Detailed Description

template<class T>
struct jau::callocator< T >

A simple allocator using POSIX C functions: ::malloc(), ::free() and ::realloc().

It is the missing ::realloc() in std::allocator, motivating this class.
Since realloc() requires the passed pointer to originate from malloc() or calloc, we have to use it for allocate() as well.

Added method is reallocate() using the native realloc().

This class shall be compliant with C++ named requirements for Allocator.

Not implementing deprecated (C++17) and removed (C++20) methods: address(), max_size(), construct() and destroy().

Examples

test_cow_darray_perf01.cpp.

Definition at line 49 of file callocator.hpp.

Member Typedef Documentation

value_type

template<class T >

typedef T jau::callocator< T >::value_type

Definition at line 53 of file callocator.hpp.

size_type

template<class T >

typedef std::size_t jau::callocator< T >::size_type

Definition at line 54 of file callocator.hpp.

difference_type

template<class T >

typedef std::ptrdiff_t jau::callocator< T >::difference_type

Definition at line 55 of file callocator.hpp.

propagate_on_container_move_assignment

template<class T >

typedef std::true_type jau::callocator< T >::propagate_on_container_move_assignment

Definition at line 56 of file callocator.hpp.

is_always_equal

template<class T >

typedef std::true_type jau::callocator< T >::is_always_equal

Definition at line 59 of file callocator.hpp.

pointer

template<class T >

typedef T* jau::callocator< T >::pointer

Definition at line 62 of file callocator.hpp.

const_pointer

template<class T >

typedef const T* jau::callocator< T >::const_pointer

Definition at line 63 of file callocator.hpp.

reference

template<class T >

typedef T& jau::callocator< T >::reference

Definition at line 64 of file callocator.hpp.

const_reference

template<class T >

typedef const T& jau::callocator< T >::const_reference

Definition at line 65 of file callocator.hpp.

Constructor & Destructor Documentation

callocator() [1/3]

template<class T >

jau::callocator< T >::callocator ( )

defaultnoexcept

callocator() [2/3]

template<class T >

jau::callocator< T >::callocator ( const callocator< T > &  )

inlinenoexcept

Definition at line 80 of file callocator.hpp.

callocator() [3/3]

template<class T >

template<typename U >

jau::callocator< T >::callocator ( const callocator< U > &  )

inlinenoexcept

Definition at line 90 of file callocator.hpp.

~callocator()

template<class T >

jau::callocator< T >::~callocator ( )

default

Member Function Documentation

allocate() [1/2]

template<class T >

value_type * jau::callocator< T >::allocate ( std::size_t  n, const void *    )

inline

Definition at line 101 of file callocator.hpp.

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allocate() [2/2]

template<class T >

value_type * jau::callocator< T >::allocate ( std::size_t  n )

inline

Definition at line 111 of file callocator.hpp.

reallocate()

template<class T >

constexpr value_type * jau::callocator< T >::reallocate ( value_type *  p, std::size_t  , std::size_t  new_size  )

inlineconstexpr

Definition at line 116 of file callocator.hpp.

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deallocate()

template<class T >

void jau::callocator< T >::deallocate ( value_type *  p, std::size_t    )

inline

Definition at line 126 of file callocator.hpp.

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The documentation for this struct was generated from the following file:

• jaulib/include/jau/callocator.hpp