numerical::detail::default_init_allocator< T > Struct Template Reference

The allocator of numerical::buffer. An element constructed with no value is default-initialised, so a double keeps whatever its memory held, where std::allocator zeroes it; one constructed with a value is constructed from it. A result written in full is then written once, by the threads that compute it, not zeroed first on one of them (a product of order 512 on eight arm64 threads spent a fifth of its time in that zeroing). More...

#include <buffer.hpp>

Inheritance diagram for numerical::detail::default_init_allocator< T >:

Collaboration diagram for numerical::detail::default_init_allocator< T >:

Classes
struct	rebind
	The allocator of another element type, as std::allocator_traits rebinds it. More...

Public Types
using	value_type = T
	The element type.

Public Member Functions
	default_init_allocator () noexcept=default
template<typename U >
false	default_init_allocator (const default_init_allocator< U > &) noexcept
	From the allocator of another element type: stateless, as std::allocator.
template<typename U >
void	construct (U *at) noexcept(std::is_nothrow_default_constructible_v< U >)
	Default-initialises the element at at.
template<typename U , typename ... Args>
void	construct (U *at, Args &&... args)
	Constructs the element at at from args.

Detailed Description

template<typename T>
struct numerical::detail::default_init_allocator< T >

The allocator of numerical::buffer. An element constructed with no value is default-initialised, so a double keeps whatever its memory held, where std::allocator zeroes it; one constructed with a value is constructed from it. A result written in full is then written once, by the threads that compute it, not zeroed first on one of them (a product of order 512 on eight arm64 threads spent a fifth of its time in that zeroing).

Definition at line 35 of file buffer.hpp.

Member Typedef Documentation

value_type

template<typename T >

using numerical::detail::default_init_allocator< T >::value_type = T

The element type.

Definition at line 37 of file buffer.hpp.

Constructor & Destructor Documentation

default_init_allocator() [1/2]

template<typename T >

numerical::detail::default_init_allocator< T >::default_init_allocator ( )

defaultnoexcept

default_init_allocator() [2/2]

template<typename T >

template<typename U >

false numerical::detail::default_init_allocator< T >::default_init_allocator ( const default_init_allocator< U > &  )

inlineexplicitnoexcept

From the allocator of another element type: stateless, as std::allocator.

Definition at line 51 of file buffer.hpp.

Member Function Documentation

construct() [1/2]

template<typename T >

template<typename U >

void numerical::detail::default_init_allocator< T >::construct ( U *  at )

inlinenoexcept

Default-initialises the element at at.

Definition at line 124 of file buffer.hpp.

construct() [2/2]

template<typename T >

template<typename U , typename ... Args>

void numerical::detail::default_init_allocator< T >::construct ( U *  at, Args &&...  args  )

inline

Constructs the element at at from args.

Definition at line 132 of file buffer.hpp.

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

• include/numerical/buffer.hpp