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

Merged slab allocator (allocators for objects of the same size are merged together). More...

#include <slab_alloc>

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

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

Public Member Functions
Type *	alloc () noexcept
	Allocate an object of type Type.
Public Member Functions inherited from cxx::Base_slab_static< Obj_size, Slab_size, Max_free, Alloc >
void *	alloc () noexcept
	Allocate an object.
void	free (void *p) noexcept
	Free the given object (p).
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 free objects in the slab allocator.

Additional Inherited Members
Public Types inherited from cxx::Base_slab_static< Obj_size, Slab_size, Max_free, Alloc >
enum	{ object_size = Obj_size , slab_size = Slab_size , objects_per_slab = _A::objects_per_slab , max_free_slabs = Max_free }

Detailed Description

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

Merged slab allocator (allocators for objects of the same size are merged together).

Template Parameters

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

This slab allocator class is useful for merging slab allocators with the same parameters (equal sizeof(Type), Slab_size, Max_free, and Alloc parameters) together and share the overhead for the slab caches among all equal-sized objects.

Definition at line 476 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_static< Type, Slab_size, Max_free, Alloc >::alloc ( )

inlinenoexcept

Allocate an object of type Type.

Returns

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

Note

The object is not zeroed out by the slab allocator.

Definition at line 489 of file slab_alloc.

References cxx::Slab_static< Type, Slab_size, Max_free, Alloc >::alloc().

Referenced by cxx::Slab_static< Type, Slab_size, Max_free, Alloc >::alloc().

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

• l4/cxx/slab_alloc