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:

[legend]List of all members.

Public Types
enum	{ ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE = 512, ACE_DEFAULT_VIRTUAL_FILESYSTEM_CACHE_SIZE = 20 }
Public Member Functions
	~ACE_Filecache (void)
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
ACE_Filecache *	instance (void)
	Singleton pattern.
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 (void)
	Prevent it from being called.
Private Attributes
int	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
ACE_Filecache *	cvf_ = 0
	The reference to the instance.

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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.

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Member Enumeration Documentation

anonymous enum

Enumeration values: 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.

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Constructor & Destructor Documentation

ACE_Filecache::~ACE_Filecache (  void   )

ACE_Filecache::ACE_Filecache (  void   )  [protected]

Prevent it from being called.

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Member Function Documentation

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

Create a new Filecache_Object, returns it.

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.

int ACE_Filecache::find (  const ACE_TCHAR *  filename  )

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

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.

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

ACE_Filecache * ACE_Filecache::instance (  void   )  [static]

Singleton pattern.

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

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

ACE_Filecache_Object * ACE_Filecache::remove_i (  const ACE_TCHAR *  filename  )  [protected]

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

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Member Data Documentation

ACE_Filecache * ACE_Filecache::cvf_ = 0 [static, private]

The reference to the instance.

ACE_SYNCH_RW_MUTEX ACE_Filecache::file_lock_[ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE] [private]

ACE_Filecache_Hash ACE_Filecache::hash_ [private]

The hash table.

ACE_SYNCH_RW_MUTEX ACE_Filecache::hash_lock_[ACE_DEFAULT_VIRTUAL_FILESYSTEM_TABLE_SIZE] [private]

int ACE_Filecache::size_ [private]

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

• Filecache.h
• Filecache.cpp

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