ACE: ACE_Filecache_Object Class Reference

ACE 6.0.1

Abstraction over a real file. This is what the Virtual Filesystem contains. This class is not intended for general consumption. Please consult a physician before attempting to use this class. More...

#include <Filecache.h>

Collaboration diagram for ACE_Filecache_Object:

Collaboration graph

List of all members.

Public Types
enum	Creation_States { ACE_READING = 1, ACE_WRITING = 2 }
enum	Error_Conditions { ACE_SUCCESS = 0, ACE_ACCESS_FAILED, ACE_OPEN_FAILED, ACE_COPY_FAILED, ACE_STAT_FAILED, ACE_MEMMAP_FAILED, ACE_WRITE_FAILED }
Public Member Functions
	ACE_Filecache_Object (const ACE_TCHAR *filename, ACE_SYNCH_RW_MUTEX &lock, LPSECURITY_ATTRIBUTES sa=0, int mapit=1)
	Creates a file for reading.
	ACE_Filecache_Object (const ACE_TCHAR *filename, ACE_OFF_T size, ACE_SYNCH_RW_MUTEX &lock, LPSECURITY_ATTRIBUTES sa=0)
	Creates a file for writing.
	~ACE_Filecache_Object (void)
	Only if reference count is zero should this be called.
int	acquire (void)
	Increment the reference_count_.
int	release (void)
	Decrement the reference_count_.
int	error (void) const
int	error (int error_value, const ACE_TCHAR *s=ACE_TEXT("ACE_Filecache_Object"))
const ACE_TCHAR *	filename (void) const
	filename_ accessor
ACE_HANDLE	handle (void) const
	handle_ accessor.
void *	address (void) const
	Base memory address for memory mapped file.
ACE_OFF_T	size (void) const
	size_ accessor.
int	update (void) const
	True if file on disk is newer than cached file.
Protected Member Functions
	ACE_Filecache_Object (void)
	Prevent from being called.
void	init (void)
	Common initialization code,.
Private Member Functions
int	error_i (int error_value, const ACE_TCHAR *s=ACE_TEXT("ACE_Filecache_Object"))
	Internal error logging method, no locking.
Private Attributes
ACE_TCHAR *	tempname_
ACE_TCHAR	filename_ [MAXPATHLEN+1]
ACE_Mem_Map	mmap_
	Holds the memory mapped version of the temporary file.
ACE_HANDLE	handle_
	The descriptor to the temporary file.
ACE_stat	stat_
	Used to compare against the real file to test if an update is needed.
ACE_OFF_T	size_
int	action_
	Status indicators.
int	error_
int	stale_
	If set to 1, means the object is flagged for removal.
LPSECURITY_ATTRIBUTES	sa_
	Security attribute object.
ACE_SYNCH_RW_MUTEX	junklock_
	The default initializer.
ACE_SYNCH_RW_MUTEX &	lock_
	Provides a bookkeeping mechanism for users of this object.
Friends
class	ACE_Filecache

Detailed Description

Abstraction over a real file. This is what the Virtual Filesystem contains. This class is not intended for general consumption. Please consult a physician before attempting to use this class.

Member Enumeration Documentation

enum ACE_Filecache_Object::Creation_States

Enumerator:

ACE_READING
ACE_WRITING

enum ACE_Filecache_Object::Error_Conditions

Enumerator:

ACE_SUCCESS
ACE_ACCESS_FAILED
ACE_OPEN_FAILED
ACE_COPY_FAILED
ACE_STAT_FAILED
ACE_MEMMAP_FAILED
ACE_WRITE_FAILED

Constructor & Destructor Documentation

ACE_Filecache_Object::ACE_Filecache_Object	(	const ACE_TCHAR *	filename,
		ACE_SYNCH_RW_MUTEX &	lock,
		LPSECURITY_ATTRIBUTES	sa = `0`,
		int	mapit = `1`
	)

Creates a file for reading.

ACE_Filecache_Object::ACE_Filecache_Object	(	const ACE_TCHAR *	filename,
		ACE_OFF_T	size,
		ACE_SYNCH_RW_MUTEX &	lock,
		LPSECURITY_ATTRIBUTES	sa = `0`
	)

Creates a file for writing.

ACE_Filecache_Object::~ACE_Filecache_Object ( void )

Only if reference count is zero should this be called.

ACE_Filecache_Object::ACE_Filecache_Object ( void ) [protected]

Prevent from being called.

Member Function Documentation

int ACE_Filecache_Object::acquire ( void )

Increment the reference_count_.

void * ACE_Filecache_Object::address ( void ) const

Base memory address for memory mapped file.

int ACE_Filecache_Object::error	(	int	error_value,
		const ACE_TCHAR *	s = `ACE_TEXT("ACE_Filecache_Object")`
	)

int ACE_Filecache_Object::error ( void ) const

int ACE_Filecache_Object::error_i	(	int	error_value,
		const ACE_TCHAR *	s = `ACE_TEXT ("ACE_Filecache_Object")`
	)		`[private]`

Internal error logging method, no locking.

const ACE_TCHAR * ACE_Filecache_Object::filename ( void ) const

filename_ accessor

ACE_HANDLE ACE_Filecache_Object::handle ( void ) const

handle_ accessor.

void ACE_Filecache_Object::init ( void ) [protected]

Common initialization code,.

int ACE_Filecache_Object::release ( void )

Decrement the reference_count_.

ACE_OFF_T ACE_Filecache_Object::size ( void ) const

size_ accessor.

int ACE_Filecache_Object::update ( void ) const

True if file on disk is newer than cached file.

Friends And Related Function Documentation

friend class ACE_Filecache [friend]

Member Data Documentation

int ACE_Filecache_Object::action_ [private]

Status indicators.

int ACE_Filecache_Object::error_ [private]

ACE_TCHAR ACE_Filecache_Object::filename_[MAXPATHLEN+1] [private]

ACE_HANDLE ACE_Filecache_Object::handle_ [private]

The descriptor to the temporary file.

ACE_SYNCH_RW_MUTEX ACE_Filecache_Object::junklock_ [private]

The default initializer.

ACE_SYNCH_RW_MUTEX& ACE_Filecache_Object::lock_ [private]

Provides a bookkeeping mechanism for users of this object.

ACE_Mem_Map ACE_Filecache_Object::mmap_ [private]

Holds the memory mapped version of the temporary file.

LPSECURITY_ATTRIBUTES ACE_Filecache_Object::sa_ [private]

Security attribute object.

ACE_OFF_T ACE_Filecache_Object::size_ [private]

int ACE_Filecache_Object::stale_ [private]

If set to 1, means the object is flagged for removal.

ACE_stat ACE_Filecache_Object::stat_ [private]

Used to compare against the real file to test if an update is needed.

ACE_TCHAR* ACE_Filecache_Object::tempname_ [private]

The temporary file name and the real file name. The real file is copied into the temporary file for safety reasons.

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

All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines