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SimpleLruPage Class Reference

One atomic piece that may be managed by a SimpleLru chain. More...

#include "simpleLru.h"

Inheritance diagram for SimpleLruPage:
LinkedListNode GeomVertexArrayData VertexDataPage

List of all members.

Public Member Functions

 SimpleLruPage (size_t lru_size)
 SimpleLruPage (const SimpleLruPage &copy)
void dequeue_lru ()
 Removes the page from its SimpleLru.
void enqueue_lru (SimpleLru *lru)
 Adds the page to the LRU for the first time, or marks it recently-accessed if it has already been added.
virtual void evict_lru ()
 Evicts the page from the LRU.
SimpleLruget_lru () const
 Returns the LRU that manages this page, or NULL if it is not currently managed by any LRU.
size_t get_lru_size () const
 Returns the size of this page as reported to the LRU, presumably in bytes.
void mark_used_lru () const
 To be called when the page is used; this will move it to the tail of the SimpleLru queue it is already on.
void mark_used_lru (SimpleLru *lru)
 To be called when the page is used; this will move it to the tail of the specified SimpleLru queue.
void operator= (const SimpleLruPage &copy)
virtual void output (ostream &out) const
void set_lru_size (size_t lru_size)
 Specifies the size of this page, presumably in bytes, although any unit is possible.
virtual void write (ostream &out, int indent_level) const

Friends

class SimpleLru

Detailed Description

One atomic piece that may be managed by a SimpleLru chain.

To use this class, inherit from it and override evict_lru().

Definition at line 70 of file simpleLru.h.


Member Function Documentation

void SimpleLruPage::dequeue_lru ( ) [inline]

Removes the page from its SimpleLru.

Definition at line 164 of file simpleLru.I.

References LinkedListNode::remove_from_list().

Referenced by evict_lru(), and GeomVertexArrayData::evict_lru().

void SimpleLruPage::enqueue_lru ( SimpleLru lru)

Adds the page to the LRU for the first time, or marks it recently-accessed if it has already been added.

If lru is NULL, it means to remove this page from its LRU.

Definition at line 70 of file simpleLru.cxx.

References LinkedListNode::insert_before(), and LinkedListNode::remove_from_list().

Referenced by SimpleLru::begin_epoch(), and mark_used_lru().

void SimpleLruPage::evict_lru ( ) [virtual]

Evicts the page from the LRU.

Called internally when the LRU determines that it is full. May also be called externally when necessary to explicitly evict the page.

It is legal for this method to either evict the page as requested, do nothing (in which case the eviction will be requested again at the next epoch), or requeue itself on the tail of the queue (in which case the eviction will be requested again much later).

Reimplemented in GeomVertexArrayData, and VertexDataPage.

Definition at line 255 of file simpleLru.cxx.

References dequeue_lru().

SimpleLru * SimpleLruPage::get_lru ( ) const [inline]

Returns the LRU that manages this page, or NULL if it is not currently managed by any LRU.

Definition at line 153 of file simpleLru.I.

size_t SimpleLruPage::get_lru_size ( ) const [inline]

Returns the size of this page as reported to the LRU, presumably in bytes.

Definition at line 208 of file simpleLru.I.

void SimpleLruPage::mark_used_lru ( ) const [inline]

To be called when the page is used; this will move it to the tail of the SimpleLru queue it is already on.

This method is const because it's not technically modifying the contents of the page itself.

Definition at line 184 of file simpleLru.I.

Referenced by VertexDataPage::get_page_data(), and GeomVertexArrayData::operator=().

void SimpleLruPage::mark_used_lru ( SimpleLru lru) [inline]

To be called when the page is used; this will move it to the tail of the specified SimpleLru queue.

Definition at line 197 of file simpleLru.I.

References enqueue_lru().

void SimpleLruPage::set_lru_size ( size_t  lru_size) [inline]

Specifies the size of this page, presumably in bytes, although any unit is possible.

Definition at line 219 of file simpleLru.I.


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