cxx::Slab< Type, Slab_size, Max_free, Alloc > Class Template Reference

Slab allocator for object of type Type. More...

#include <slab_alloc>

Inheritance diagram for cxx::Slab< Type, Slab_size, Max_free, Alloc >:

Collaboration diagram for cxx::Slab< Type, Slab_size, Max_free, Alloc >:

Public Member Functions
Type *	alloc () noexcept
	Allocate an object of type Type.
void	free (Type *o) noexcept
	Free the object addressed by o.
Public Member Functions inherited from cxx::Base_slab< Obj_size, Slab_size, Max_free, Alloc >
void *	alloc () noexcept
	Allocate a new object.
void	free (void *_o) noexcept
	Free the given object (_o).
unsigned	total_objects () const noexcept
	Get the total number of objects managed by the slab allocator.
unsigned	free_objects () const noexcept
	Get the number of objects which can be allocated before a new empty slab needs to be added to the slab allocator.

Additional Inherited Members
Public Types inherited from cxx::Base_slab< Obj_size, Slab_size, Max_free, Alloc >
enum	{ object_size = Obj_size , slab_size = Slab_size , objects_per_slab = (Slab_size - sizeof(Slab_head)) / object_size , max_free_slabs = Max_free }
typedef Alloc< Slab_i >	Slab_alloc
	Type of the backend allocator.

Detailed Description

template<typename Type, int Slab_size = L4_PAGESIZE, int Max_free = 2, template< typename A > class Alloc = New_allocator>
class cxx::Slab< Type, Slab_size, Max_free, Alloc >

Slab allocator for object of type Type.

Template Parameters

Type	The type of the objects to manage.
Slab_size	Size of a slab.
Max_free	The maximum number of free slabs.
Alloc	The allocator for the slabs.

Definition at line 346 of file slab_alloc.

Member Function Documentation

alloc()

template<typename Type , int Slab_size = L4_PAGESIZE, int Max_free = 2, template< typename A > class Alloc = New_allocator>

Type * cxx::Slab< Type, Slab_size, Max_free, Alloc >::alloc ( )

inlinenoexcept

Allocate an object of type Type.

Returns

A pointer to the object just allocated, or 0 on failure.

Note

The user is responsible for initializing the object.

Definition at line 366 of file slab_alloc.

free()

template<typename Type , int Slab_size = L4_PAGESIZE, int Max_free = 2, template< typename A > class Alloc = New_allocator>

void cxx::Slab< Type, Slab_size, Max_free, Alloc >::free ( Type *  o )

inlinenoexcept

Free the object addressed by o.

Parameters

o	The pointer to the object to free.

Precondition

The object must have been allocated with this allocator.

Definition at line 377 of file slab_alloc.

References cxx::Slab< Type, Slab_size, Max_free, Alloc >::free().

Referenced by cxx::Slab< Type, Slab_size, Max_free, Alloc >::free().

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

• l4/cxx/slab_alloc