binary_segregator< Segregatable, RawAllocator > Class Template Reference

Detailed Description

template<class Segregatable, class RawAllocator>
class foonathan::memory::binary_segregator< Segregatable, RawAllocator >

A RawAllocator that either uses the Segregatable or the other RawAllocator.

It is a faster alternative to fallback_allocator that doesn't require a composable allocator and decides about the allocator to use purely with the Segregatable based on size and alignment.

Typedefs
using	segregatable = Segregatable
using	segregatable_allocator_type = typename segregatable::allocator_type
using	fallback_allocator_type = typename allocator_traits< RawAllocator >::allocator_type

Member Functions
	binary_segregator (segregatable s, fallback_allocator_type fallback=fallback_allocator_type())
void *	allocate_node (std::size_t size, std::size_t alignment)
void	deallocate_node (void *ptr, std::size_t size, std::size_t alignment) noexcept
void *	allocate_array (std::size_t count, std::size_t size, std::size_t alignment)
void	deallocate_array (void *array, std::size_t count, std::size_t size, std::size_t alignment) noexcept
std::size_t	max_node_size () const
std::size_t	max_array_size () const
std::size_t	max_alignemnt () const
segregatable_allocator_type &	get_segregatable_allocator () noexcept
const segregatable_allocator_type &	get_segregatable_allocator () const noexcept
fallback_allocator_type &	get_fallback_allocator () noexcept
const fallback_allocator_type &	get_fallback_allocator () const noexcept

Constructors

binary_segregator()

binary_segregator ( segregatable  s, fallback_allocator_type  fallback = fallback_allocator_type()  )

explicit

Effects:

Creates it by giving the Segregatable and the RawAllocator.

Member Functions

allocate_node()

void * allocate_node	(	std::size_t	size,
		std::size_t	alignment
	)

Effects:

Uses the Segregatable to decide which allocator to use. Then forwards to the chosen allocator.

deallocate_node()

void deallocate_node ( void *  ptr, std::size_t  size, std::size_t  alignment  )

noexcept

Effects:

Uses the Segregatable to decide which allocator to use. Then forwards to the chosen allocator.

allocate_array()

void * allocate_array	(	std::size_t	count,
		std::size_t	size,
		std::size_t	alignment
	)

Effects:

Uses the Segregatable to decide which allocator to use. Then forwards to the chosen allocator.

deallocate_array()

void deallocate_array ( void *  array, std::size_t  count, std::size_t  size, std::size_t  alignment  )

noexcept

Effects:

Uses the Segregatable to decide which allocator to use. Then forwards to the chosen allocator.

max_node_size()

std::size_t max_node_size

(

)

const

Returns:

The maximum value of the fallback.

Note

It assumes that the fallback will be used for larger allocations, and the Segregatable for smaller ones.

max_array_size()

std::size_t max_array_size

(

)

const

Returns:

The maximum value of the fallback.

Note

It assumes that the fallback will be used for larger allocations, and the Segregatable for smaller ones.

max_alignemnt()

std::size_t max_alignemnt

(

)

const

Returns:

The maximum value of the fallback.

Note

It assumes that the fallback will be used for larger allocations, and the Segregatable for smaller ones.

get_segregatable_allocator() [1/2]

segregatable_allocator_type & get_segregatable_allocator ( )

noexcept

Returns:

A reference to the segregatable allocator. This is the one primarily used.

get_segregatable_allocator() [2/2]

const segregatable_allocator_type & get_segregatable_allocator ( ) const

noexcept

Returns:

A reference to the segregatable allocator. This is the one primarily used.

get_fallback_allocator() [1/2]

fallback_allocator_type & get_fallback_allocator ( )

noexcept

Returns:

A reference to the fallback allocator. It will be used if the Segregator doesn't want the alloction.

get_fallback_allocator() [2/2]

const fallback_allocator_type & get_fallback_allocator ( ) const

noexcept

Returns:

A reference to the fallback allocator. It will be used if the Segregator doesn't want the alloction.