ACE_Filecache Class Reference

A hash table holding the information about entry point into the Cached Virtual Filesystem. On insertion, the reference count is incremented. On destruction, reference count is decremented. More...

#include <Filecache.h>

Collaboration diagram for ACE_Filecache:

Public Types
enum	{ ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE = 512 , ACE_DEFAULT_VIRTUAL_FILESYSTEM_CACHE_SIZE = 20 }

Public Member Functions
	~ACE_Filecache ()
int	find (const ACE_TCHAR *filename)
ACE_Filecache_Object *	fetch (const ACE_TCHAR *filename, int mapit=1)
ACE_Filecache_Object *	remove (const ACE_TCHAR *filename)
	Remove the file associated with `‘filename’' from the cache.
ACE_Filecache_Object *	create (const ACE_TCHAR *filename, int size)
	Create a new Filecache_Object, returns it.
ACE_Filecache_Object *	finish (ACE_Filecache_Object *&new_file)

Static Public Member Functions
static ACE_Filecache *	instance ()
	Singleton pattern.

Public Attributes
	ACE_ALLOC_HOOK_DECLARE

Protected Member Functions
ACE_Filecache_Object *	insert_i (const ACE_TCHAR *filename, ACE_SYNCH_RW_MUTEX &filelock, int mapit)
ACE_Filecache_Object *	remove_i (const ACE_TCHAR *filename)
ACE_Filecache_Object *	update_i (const ACE_TCHAR *filename, ACE_SYNCH_RW_MUTEX &filelock, int mapit)
	ACE_Filecache ()
	Prevent it from being called.

Private Attributes
ACE_OFF_T	size_
ACE_Filecache_Hash	hash_
	The hash table.
ACE_SYNCH_RW_MUTEX	hash_lock_ [ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE]
ACE_SYNCH_RW_MUTEX	file_lock_ [ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE]

Static Private Attributes
static ACE_Filecache *	cvf_ = 0
	The reference to the instance.

Detailed Description

A hash table holding the information about entry point into the Cached Virtual Filesystem. On insertion, the reference count is incremented. On destruction, reference count is decremented.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE	For this stupid implementation, use an array. Someday, use a balanced search tree, or real hash table.
ACE_DEFAULT_VIRTUAL_FILESYSTEM_CACHE_SIZE	This determines the highwater mark in megabytes for the cache. This will be ignored for now.

Constructor & Destructor Documentation

~ACE_Filecache()

ACE_Filecache::~ACE_Filecache

(

)

ACE_Filecache()

ACE_Filecache::ACE_Filecache ( )

protected

Prevent it from being called.

Member Function Documentation

create()

ACE_Filecache_Object * ACE_Filecache::create	(	const ACE_TCHAR *	filename,
		int	size )

Create a new Filecache_Object, returns it.

fetch()

ACE_Filecache_Object * ACE_Filecache::fetch	(	const ACE_TCHAR *	filename,
		int	mapit = 1 )

Return the file associated with `‘filename’' if it is in the cache, or create if not.

find()

int ACE_Filecache::find

(

const ACE_TCHAR *

filename

)

Returns 0 if the file associated with `‘filename’' is in the cache, or -1 if not.

finish()

ACE_Filecache_Object * ACE_Filecache::finish

(

ACE_Filecache_Object *&

new_file

)

Release an acquired Filecache_Object, returns it again or NULL if it was deleted.

insert_i()

ACE_Filecache_Object * ACE_Filecache::insert_i ( const ACE_TCHAR * filename, ACE_SYNCH_RW_MUTEX & filelock, int mapit )

protected

instance()

ACE_Filecache * ACE_Filecache::instance ( )

static

Singleton pattern.

remove()

ACE_Filecache_Object * ACE_Filecache::remove

(

const ACE_TCHAR *

filename

)

Remove the file associated with `‘filename’' from the cache.

remove_i()

ACE_Filecache_Object * ACE_Filecache::remove_i ( const ACE_TCHAR * filename )

protected

update_i()

ACE_Filecache_Object * ACE_Filecache::update_i ( const ACE_TCHAR * filename, ACE_SYNCH_RW_MUTEX & filelock, int mapit )

protected

Member Data Documentation

ACE_ALLOC_HOOK_DECLARE

ACE_Filecache::ACE_ALLOC_HOOK_DECLARE

cvf_

ACE_Filecache * ACE_Filecache::cvf_ = 0

staticprivate

The reference to the instance.

file_lock_

ACE_SYNCH_RW_MUTEX ACE_Filecache::file_lock_[ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE]

private

hash_

ACE_Filecache_Hash ACE_Filecache::hash_

private

The hash table.

hash_lock_

ACE_SYNCH_RW_MUTEX ACE_Filecache::hash_lock_[ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE]

private

size_

ACE_OFF_T ACE_Filecache::size_

private

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

• Filecache.h
• Filecache.cpp