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Public Member Functions | Static Public Member Functions | Private Member Functions | Private Attributes | List of all members
DcmTempFileHandler Class Reference

class that manages the life cycle of a temporary file. More...

Public Member Functions

DcmInputStreamcreate () const
 create an input stream that permits reading from the temporary file More...
 
void increaseRefCount ()
 increase reference counter for this object
 
void decreaseRefCount ()
 decreases reference counter for this object and deletes the temporary file and this object if the reference counter becomes zero.
 

Static Public Member Functions

static DcmTempFileHandlernewInstance (const OFFilename &filename)
 static method that permits creation of instances of this class (only) on the heap, never on the stack. More...
 

Private Member Functions

 DcmTempFileHandler (const OFFilename &filename)
 private constructor. More...
 
virtual ~DcmTempFileHandler ()
 private destructor. More...
 
 DcmTempFileHandler (const DcmTempFileHandler &arg)
 private undefined copy constructor
 
DcmTempFileHandleroperator= (const DcmTempFileHandler &arg)
 private undefined copy assignment operator
 

Private Attributes

size_t refCount_
 number of references to temporary file. More...
 
OFMutex mutex_
 mutex for MT-safe reference counting
 
OFFilename filename_
 path to temporary file
 

Detailed Description

class that manages the life cycle of a temporary file.

It maintains a thread-safe reference counter, and when this counter is decreased to zero, unlinks (deletes) the file and then the handler object itself.

Constructor & Destructor Documentation

DcmTempFileHandler::DcmTempFileHandler ( const OFFilename filename)
private

private constructor.

Instances of this class are always created through newInstance().

Parameters
filenamepath to temporary file (may contain wide chars if support enabled)
virtual DcmTempFileHandler::~DcmTempFileHandler ( )
privatevirtual

private destructor.

Instances of this class are always deleted through the reference counting methods

Member Function Documentation

DcmInputStream* DcmTempFileHandler::create ( ) const

create an input stream that permits reading from the temporary file

Returns
pointer to input stream. Note that there is no guarantee that the input stream actually permits reading, i.e. the presence of the temporary file is not checked.
static DcmTempFileHandler* DcmTempFileHandler::newInstance ( const OFFilename filename)
static

static method that permits creation of instances of this class (only) on the heap, never on the stack.

A newly created instance always has a reference counter of 1.

Parameters
filenamepath to temporary file (may contain wide chars if support enabled)

Member Data Documentation

size_t DcmTempFileHandler::refCount_
private

number of references to temporary file.

Default initialized to 1 upon construction of this object


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


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