MemIOHandler Class Reference

Allows the web server to read from a memory buffer instead of a file. More...

#include <mem_io_handler.h>

Inheritance diagram for MemIOHandler:

Public Member Functions
	MemIOHandler (void *buffer, int length)
	Initializes the internal buffer.
	MemIOHandler (zmm::String str)
virtual	~MemIOHandler ()
virtual void	open (IN enum UpnpOpenFileMode mode)
virtual int	read (OUT char *buf, IN size_t length)
virtual void	seek (IN off_t offset, IN int whence)
virtual void	open (enum UpnpOpenFileMode mode)
	Opens a data for the web server.
virtual int	read (char *buf, size_t length)
	Reads previously opened/initialized data sequentially.
virtual int	write (char *buf, size_t length)
	Writes to previously opened/initialized data sequentially.
virtual void	seek (off_t offset, int whence)
	Performs a seek on an open/initialized data.
virtual void	close ()
	Close/free previously opened/initialized data.
void	retain ()
void	release ()
int	getRefCount ()
Static Public Member Functions
static void *	operator new (size_t size)
static void	operator delete (void *ptr)
Protected Attributes
char *	buffer
	buffer that is holding our data.
off_t	length
off_t	pos
	current offset in the buffer
mt_atomic_t	_ref_count
pthread_mutex_t	mutex

Detailed Description

Allows the web server to read from a memory buffer instead of a file.

Definition at line 39 of file mem_io_handler.h.

Constructor & Destructor Documentation

MemIOHandler::MemIOHandler	(	void *	buffer,
		int	length
	)

Initializes the internal buffer.

Parameters:

buffer

all operations will be done on this buffer.

Definition at line 55 of file mem_io_handler.cc.

References MALLOC.

MemIOHandler::MemIOHandler ( zmm::String str )

Definition at line 62 of file mem_io_handler.cc.

References buffer, zmm::String::c_str(), zmm::String::length(), length, and MALLOC.

MemIOHandler::~MemIOHandler ( ) [virtual]

Definition at line 69 of file mem_io_handler.cc.

References buffer, and FREE.

Member Function Documentation

void IOHandler::close ( ) [virtual, inherited]

Close/free previously opened/initialized data.

Reimplemented in BufferedIOHandler, DVDIOHandler, FDIOHandler, FileIOHandler, IOHandlerBufferHelper, and ProcessIOHandler.

Definition at line 136 of file io_handler.cc.

int Object::getRefCount ( ) [inherited]

Definition at line 78 of file object.cc.

References zmm::Object::_ref_count, and atomic_get().

virtual void IOHandler::open ( enum UpnpOpenFileMode mode ) [virtual, inherited]

Opens a data for the web server.

Parameters:

mode

in which the data will be opened (we only support UPNP_READ)

Todo:: Genych, ya tut che to zapamyatowal kak gawno rabotaet? kto filename poluchaet??

Reimplemented in BufferedIOHandler, and IOHandlerBufferHelper.

void MemIOHandler::open ( IN enum UpnpOpenFileMode mode ) [virtual]

Definition at line 74 of file mem_io_handler.cc.

References pos.

void Object::operator delete ( void * ptr ) [static, inherited]

Definition at line 87 of file object.cc.

References FREE.

void * Object::operator new ( size_t size ) [static, inherited]

Definition at line 83 of file object.cc.

References MALLOC.

virtual int IOHandler::read	(	char *	buf,
		size_t	length
	)			`[virtual, inherited]`

Reads previously opened/initialized data sequentially.

Parameters:

	buf	This buffer will be filled by our read functions.
	length	Number of bytes to read.

Reimplemented in IOHandlerBufferHelper.

Referenced by web_read().

int MemIOHandler::read	(	OUT char *	buf,
		IN size_t	length
	)			`[virtual]`

Definition at line 79 of file mem_io_handler.cc.

References buffer, and pos.

void Object::release ( ) [inherited]

Definition at line 66 of file object.cc.

References zmm::Object::_ref_count, atomic_dec(), and zmm::Object::mutex.

Referenced by zmm::ArrayBase::clear(), zmm::String::operator=(), DSOHash< zmm::Array< CacheObject > >::releaseData(), DSBHash< VT >::releaseData(), DSOHash< zmm::Array< CacheObject > >::remove(), zmm::ArrayBase::remove(), zmm::ArrayBase::removeUnordered(), zmm::ArrayBase::set(), zmm::ArrayBase::~ArrayBase(), DSOHash< zmm::Array< CacheObject > >::~DSOHash(), zmm::ObjectQueue< AutoscanDirectory >::~ObjectQueue(), zmm::ObjectStack< Element >::~ObjectStack(), and zmm::String::~String().

void Object::retain ( ) [inherited]

Definition at line 58 of file object.cc.

References zmm::Object::_ref_count, atomic_inc(), and zmm::Object::mutex.

Referenced by zmm::ArrayBase::append(), zmm::ObjectQueue< AutoscanDirectory >::enqueue(), zmm::ArrayBase::insert(), zmm::String::operator=(), zmm::ObjectStack< Element >::push(), DSOHash< zmm::Array< CacheObject > >::put(), DSBHash< VT >::put(), zmm::ArrayBase::set(), and zmm::String::String().

virtual void IOHandler::seek	(	off_t	offset,
		int	whence
	)			`[virtual, inherited]`

Performs a seek on an open/initialized data.

Parameters:

	offset	Number of bytes to move in the buffer. For seeking forwards positive values are used, for seeking backwards - negative. Offset must be positive if origin is set to SEEK_SET
	whence	The position to move relative to. SEEK_CUR to move relative to current position, SEEK_END to move relative to the end of file, SEEK_SET to specify an absolute offset.

Reimplemented in IOHandlerBufferHelper.

Referenced by web_seek().