RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp > Class Template Reference

Implements a simple lock stream that can be used with any kind of output stream. More...

#include <rw/stream/RWTOutputStreamLockImp.h>

Inherits FilteredOutputStreamImp.

Public Types
typedef OutputStream::element_type	element_type
typedef OutputStream	RWOutputStream_type

Public Member Functions
virtual	~RWTOutputStreamLockImp ()
virtual OutputStream	acquire ()
virtual void	close ()
virtual void	flush ()
virtual bool	isBad () const
virtual bool	isFail () const
virtual bool	isGood () const
virtual void	release ()
virtual void	write (element_type value)
virtual void	write (const element_type *array, RWSize numElements)

Static Public Member Functions
static OutputStream	make (const OutputStream &sinkStream)

Protected Member Functions
	RWTOutputStreamLockImp (const OutputStream &sinkStream)
RWMutexLock &	getStreamMutex ()
RWMutexLock &	getStreamMutex () const

Detailed Description

template<class OutputStream, class FilteredOutputStreamImp>
class RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >

The class RWTOutputStreamLockImp implements a simple lock stream that can be used with any kind of output stream. The stream locks its internal synchronization mechanism before forwarding output requests to its associated sink stream, and then unlock the internal synchronization mechanism upon completion. The stream's internal synchronization mechanism is locked using a guard object, ensuring its proper release in the event that an exception is thrown.

Member Typedef Documentation

template<class OutputStream , class FilteredOutputStreamImp >

typedef OutputStream::element_type RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::element_type

A typedef for the type of element to be written to RWOutputStream_type.

template<class OutputStream , class FilteredOutputStreamImp >

typedef OutputStream RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::RWOutputStream_type

A typedef for the template parameter OutputStream which will be used as the sink for elements.

Constructor & Destructor Documentation

template<class OutputStream , class FilteredOutputStreamImp >

virtual RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::~RWTOutputStreamLockImp ( )

virtual

Destructor.

template<class OutputStream , class FilteredOutputStreamImp >

RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::RWTOutputStreamLockImp ( const OutputStream &  sinkStream )

protected

Initializes the reference to the output stream that will be used as the sink of elements.

Parameters

sinkStream

The output stream that will serve as the sink of elements.

Member Function Documentation

template<class OutputStream , class FilteredOutputStreamImp >

virtual OutputStream RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::acquire ( )

virtual

Acquires the stream's internal synchronization mechanism. The acquire() member function returns a handle to the next processing stream.

template<class OutputStream , class FilteredOutputStreamImp >

virtual void RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::close ( )

virtual

Calls close() on the next processing stream.

template<class OutputStream , class FilteredOutputStreamImp >

virtual void RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::flush ( )

virtual

Calls flush() on the next processing stream.

template<class OutputStream , class FilteredOutputStreamImp >

RWMutexLock & RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::getStreamMutex ( )

inlineprotected

These functions return the stream's internal synchronization mechanism. They throw no exceptions.

template<class OutputStream , class FilteredOutputStreamImp >

RWMutexLock & RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::getStreamMutex ( ) const

inlineprotected

These functions return the stream's internal synchronization mechanism. They throw no exceptions.

template<class OutputStream , class FilteredOutputStreamImp >

virtual bool RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::isBad ( ) const

virtual

Returns true to indicate a loss of integrity resulting from an output operation. Throws no exceptions.

template<class OutputStream , class FilteredOutputStreamImp >

virtual bool RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::isFail ( ) const

virtual

Returns true to indicate that an output operation failed to generate the desired data. Throws no exceptions.

template<class OutputStream , class FilteredOutputStreamImp >

virtual bool RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::isGood ( ) const

virtual

Returns true to indicate a stream in a valid state. Throws no exceptions.

template<class OutputStream , class FilteredOutputStreamImp >

static OutputStream RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::make ( const OutputStream &  sinkStream )

inlinestatic

Constructs an RWTOutputStreamLockImp instance that uses sinkStream as its sink of elements, and returns a handle to it. Throws no exceptions.

Parameters

sinkStream

The output stream that will serve as the sink of elements.

template<class OutputStream , class FilteredOutputStreamImp >

virtual void RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::release ( )

virtual

Releases the stream's internal synchronization mechanism.

template<class OutputStream , class FilteredOutputStreamImp >

virtual void RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::write ( element_type  value )

virtual

Writes a single element to the stream.

Parameters

value

The element to be written to the stream.

template<class OutputStream , class FilteredOutputStreamImp >

virtual void RWTOutputStreamLockImp< OutputStream, FilteredOutputStreamImp >::write ( const element_type *  array, RWSize  numElements  )

virtual

Writes an array of elements to the stream.

Parameters

array	A pointer to the first element of the array.
numElements	The number of elements to be written to the stream.