dodo::data::memory::shared Class Reference

provides shared data functionality More...

Collaboration diagram for dodo::data::memory::shared:

Classes
struct	__shared__
	defines shared data More...
Public Member Functions
	shared (const int key)
	constructor
	shared ()
	constructor
	~shared ()
	destructor
void	open (const int key) const
	open or create shared memory object
void	close () const
	close shared memory object
void *	map (unsigned long size=0) const
	map shared data
void	unmap () const
	unmap shared data
void *	data () const
unsigned long	size () const
Static Public Member Functions
static void	remove (int key)
	remove the shared data from the system
Protected Attributes
int	handle
	shared data descriptor
struct __shared__	sh
	shared data
__key__ *	key
	key for the shared data
bool	autogenerated
	true if key was autogenerated

Detailed Description

provides shared data functionality

Note:: if the key was not autogenerated the semaphore is not removed from the system you should call remove to remove it from the system

Definition at line 50 of file dataMemoryShared.h.

dodo::data::memory::shared::shared ( const int key )

constructor

Parameters:

key

defines shared memory key

Note:: if key is 0 - key will be generated if you want to share data between different instances of process - set own key, otherwise(like fork) - it may be generated

dodo::data::memory::shared::shared ( )

constructor

dodo::data::memory::shared::~shared ( )

destructor

void dodo::data::memory::shared::close ( ) const

close shared memory object

void* dodo::data::memory::shared::data ( ) const

void* dodo::data::memory::shared::map ( unsigned long size = 0 ) const

Parameters:

size

defines size of shared data

Note:: if map is called twice - old data will be unmapped is size is 0 it will be detected automatically

void dodo::data::memory::shared::open ( const int key ) const

open or create shared memory object

Parameters:

key

defines shared memory key

Note:: if key is 0 - key will be generated if you want to share data between different instances of process - set own key, otherwise(like fork) - it may be generated

static void dodo::data::memory::shared::remove ( int key ) [static]

remove the shared data from the system

Parameters:

key

defines the key of the shared data

unsigned long dodo::data::memory::shared::size ( ) const