Slab_allocator Class Reference

A Slab_allocator is responsible for managing several slabs that have the same slab object size. More...

#include <slaballoc.h>

Collaboration diagram for Slab_allocator:

[legend]List of all members.

Public Member Functions
void	init (unsigned size, bool physical_memory=false)
void *	alloc ()
void	free (void *object)
void	clear ()
unsigned	flush ()
unsigned	get_object_size () const
void	touch ()
Protected Member Functions
Slab *	find_slab_with_free_object ()
Slab *	alloc_slab ()
Protected Attributes
unsigned	object_size
Slab *	current_slab
List< Slab >	free_slabs
List< Slab >	used_slabs
bool	physical

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Detailed Description

A Slab_allocator is responsible for managing several slabs that have the same slab object size.

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Member Function Documentation

void * Slab_allocator::alloc (   )

Allocate a chunk of memory from one of the slabs this allocator manages.

Slab * Slab_allocator::alloc_slab (   )  [protected]

Allocate a new slab and add it to this slab allocator's free_slabs list.

void Slab_allocator::clear (   )

Free and flush all slabs managed by this allocator.

Slab * Slab_allocator::find_slab_with_free_object (   )  [protected]

Return a slab with at least one free object.

unsigned Slab_allocator::flush (   )

Return any completely free slabs back to the underlying page allocator.

void Slab_allocator::free (  void *  object  )

Free the given chunk of memory from one of the slabs of this allocator.

unsigned Slab_allocator::get_object_size (   )  const [inline]

void Slab_allocator::init (  unsigned  size, bool  physical_memory = false )

Initialize this slab allocator with the given object size, using either virtual or physical memory.

void Slab_allocator::touch (   )  [inline]

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Member Data Documentation

Slab* Slab_allocator::current_slab [protected]

current slab where allocs happen

List<Slab> Slab_allocator::free_slabs [protected]

empty slabs; may be safely flushed

unsigned Slab_allocator::object_size [protected]

size of objects in managed slabs

bool Slab_allocator::physical [protected]

whether physical memory is used

List<Slab> Slab_allocator::used_slabs [protected]

slabs with objects; do not flush

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

• slaballoc.h
• slaballoc.cc

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Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman