AllocatorBase< T > Class Template Reference

Base class for all allocators used by SecBlock. More...

Inheritance diagram for AllocatorBase< T >:

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

Public Member Functions
pointer	address (reference r) const
const_pointer	address (const_reference r) const
void	construct (pointer p, const T &val)
void	destroy (pointer p)
size_type	max_size () const
	Returns the maximum number of elements the allocator can provide. More...
template<typename V , typename... Args>
void	construct (V *ptr, Args &&... args)
	Constructs a new V using variadic arguments. More...
template<typename V >
void	destroy (V *ptr)
	Destroys an V constructed with variadic arguments. More...

Static Public Attributes
static const size_type	ELEMS_MAX = ...
	Returns the maximum number of elements the allocator can provide. More...

Detailed Description

template<class T>
class AllocatorBase< T >

Base class for all allocators used by SecBlock.

Template Parameters

T	the class or type

Definition at line 29 of file secblock.h.

Member Function Documentation

max_size()

template<class T >

size_type AllocatorBase< T >::max_size ( ) const

inline

Returns the maximum number of elements the allocator can provide.

Returns

the maximum number of elements the allocator can provide

Internally, preprocessor macros are used rather than std::numeric_limits because the latter is not a constexpr. Some compilers, like Clang, do not optimize it well under all circumstances. Compilers like GCC, ICC and MSVC appear to optimize it well in either form.

Definition at line 73 of file secblock.h.

construct()

template<class T >

template<typename V , typename... Args>

void AllocatorBase< T >::construct ( V *  ptr, Args &&...  args  )

inline

Constructs a new V using variadic arguments.

Template Parameters

V	the type to be forwarded
Args	the arguments to be forwarded

Parameters

ptr	pointer to type V
args	variadic arguments

This is a C++11 feature. It is available when CRYPTOPP_CXX11_VARIADIC_TEMPLATES is defined. The define is controlled by compiler versions detected in config.h.

Definition at line 91 of file secblock.h.

destroy()

template<class T >

template<typename V >

void AllocatorBase< T >::destroy ( V *  ptr )

inline

Destroys an V constructed with variadic arguments.

Template Parameters

V	the type to be forwarded

This is a C++11 feature. It is available when CRYPTOPP_CXX11_VARIADIC_TEMPLATES is defined. The define is controlled by compiler versions detected in config.h.

Definition at line 98 of file secblock.h.

Member Data Documentation

ELEMS_MAX

template<class T >

const size_type AllocatorBase< T >::ELEMS_MAX = ...

static

Returns the maximum number of elements the allocator can provide.

ELEMS_MAX is the maximum number of elements the Allocator can provide. The value of ELEMS_MAX is SIZE_MAX/sizeof(T). std::numeric_limits was avoided due to lack of constexpr-ness in C++03 and below.

Note

In C++03 and below ELEMS_MAX is a static data member of type size_type. In C++11 and above ELEMS_MAX is an enum inheriting from size_type. In both cases ELEMS_MAX can be used before objects are fully constructed, and it does not suffer the limitations of class methods like max_size.

See also

Issue 346/CVE-2016-9939

Since

Crypto++ 6.0

Definition at line 58 of file secblock.h.

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

• secblock.h