A networked, versioned barrier. More...

#include <barrier.h>

Inheritance diagram for co::Barrier:

Collaboration diagram for co::Barrier:

Public Member Functions
CO_API	Barrier (LocalNodePtr localNode, const uint128_t &masterNodeID, const uint32_t height=0)
	Construct and register a new distributed barrier. More...

CO_API	Barrier (LocalNodePtr localNode, const ObjectVersion &barrier)
	Construct and join a distributed barrier. More...

virtual CO_API	~Barrier ()
	Destruct the barrier. More...

Data Access
After a change, the barrier has to be committed and synced to the same version on all nodes entering the barrier.
bool	isGood () const

CO_API void	setHeight (const uint32_t height)
	Set the number of participants in the barrier. More...

CO_API void	increase ()
	Add one participant to the barrier. More...

CO_API uint32_t	getHeight () const

Operations
CO_API bool	enter (const uint32_t timeout=LB_TIMEOUT_INDEFINITE)
	Enter the barrier, blocks until the barrier has been reached. More...

Public Member Functions inherited from co::Object
virtual CO_API	~Object ()
	Destruct the distributed object. More...

CO_API bool	isAttached () const

CO_API LocalNodePtr	getLocalNode ()

CO_API void	setID (const uint128_t &identifier)
	Set the object's unique identifier. More...

CO_API const uint128_t &	getID () const

CO_API uint32_t	getInstanceID () const

CO_API bool	isBuffered () const

CO_API bool	isMaster () const

virtual uint64_t	getMaxVersions () const
	Limit the number of queued versions on slave instances. More...

virtual CO_API uint32_t	chooseCompressor () const
	Return the compressor to be used for data transmission. More...

virtual bool	isDirty () const
	Return if this object needs a commit. More...

CO_API void	push (const uint128_t &groupID, const uint128_t &objectType, const Nodes &nodes)
	Push the instance data of the object to the given nodes. More...

virtual CO_API uint128_t	commit (const uint32_t incarnation=CO_COMMIT_NEXT)
	Commit a new version of this object. More...

CO_API void	setAutoObsolete (const uint32_t count)
	Automatically obsolete old versions. More...

CO_API uint32_t	getAutoObsolete () const

virtual CO_API uint128_t	sync (const uint128_t &version=VERSION_HEAD)
	Sync to a given version. More...

CO_API uint128_t	getHeadVersion () const

CO_API uint128_t	getVersion () const

virtual CO_API void	notifyNewHeadVersion (const uint128_t &version)
	Notification that a new head version was received by a slave object. More...

virtual void	notifyNewVersion ()
	Notification that a new version was received by a master object. More...

CO_API ObjectOCommand	send (NodePtr node, const uint32_t cmd, const uint32_t instanceID=CO_INSTANCE_ALL)
	Send a command with optional data to object instance(s) on another node. More...

virtual void	notifyAttach ()
	Notify that this object will be registered or mapped. More...

virtual void	notifyAttached ()
	Notify that this object has been registered or mapped. More...

virtual CO_API void	notifyDetach ()
	Notify that this object will be deregistered or unmapped. More...

virtual void	notifyDetached ()
	Notify that this object has been deregistered or unmapped. More...

uint32_t	getMasterInstanceID () const

NodePtr	getMasterNode ()

CO_API void	removeSlave (NodePtr node, const uint32_t instanceID)

CO_API void	removeSlaves (NodePtr node)

void	setMasterNode (NodePtr node)

void	addInstanceDatas (const ObjectDataIStreamDeque &, const uint128_t &)

void	setupChangeManager (const Object::ChangeType type, const bool master, LocalNodePtr localNode, const uint32_t masterInstanceID)

virtual CO_API void	detach ()

void	transfer (Object *from)

void	applyMapData (const uint128_t &version)

void	sendInstanceData (Nodes &nodes)

Public Member Functions inherited from co::Dispatcher
Dispatcher &	operator= (const Dispatcher &)

template<typename T >
void	registerCommand (const uint32_t command, const CommandFunc< T > &func, CommandQueue *queue)
	Register a command member function for a command. More...

virtual CO_API bool	dispatchCommand (ICommand &command)
	Dispatch a command from the receiver thread to the registered queue. More...

Protected Member Functions

void	attach (const uint128_t &id, const uint32_t instanceID) override

ChangeType	getChangeType () const override

void	getInstanceData (DataOStream &os) override
	Serialize all instance information of this distributed object. More...

void	applyInstanceData (DataIStream &is) override
	Deserialize the instance data. More...

void	pack (DataOStream &os) override
	Serialize the modifications since the last call to commit(). More...

void	unpack (DataIStream &is) override
	Deserialize a change. More...

Protected Member Functions inherited from co::Object
CO_API	Object ()
	Construct a new distributed object. More...

Object &	operator= (const Object &)
	NOP assignment operator. More...

CO_API	Object (const Object &)
	Copy construct a new, unattached object. More...

Protected Member Functions inherited from co::Dispatcher
CO_API	Dispatcher (const Dispatcher &from)

CO_API bool	_cmdUnknown (ICommand &command)
	The default handler for handling commands. More...

Additional Inherited Members
Public Types inherited from co::Object
enum	ChangeType { NONE, STATIC, INSTANCE, DELTA, UNBUFFERED }
	Object change handling characteristics, see Programming Guide. More...

Public Types inherited from co::Dispatcher
typedef CommandFunc< Dispatcher >	Func
	The signature of the base Dispatcher callback. More...

Detailed Description

A networked, versioned barrier.

On a given LocalNode only one instance of a given barrier can be mapped, i.e., multiple instances of the same barrier are currently not supported by the implementation. Not intended to be subclassed.

Definition at line 38 of file barrier.h.

Constructor & Destructor Documentation

CO_API co::Barrier::Barrier	(	LocalNodePtr	localNode,
		const uint128_t &	masterNodeID,
		const uint32_t	height = `0`
	)

Construct and register a new distributed barrier.

Barriers are versioned, distributed objects. This constructor creates and registers the barrier with its LocalNode. Other processes contributing to the barrier use the other constructor to create and map an instance to this master version.

The master node will maintain the barrier state. It has to be reachable from all other nodes participating in the barrier. If the master node identifier is not an UUID, the local node is used as the master.

Note that the node of the object master, i.e., the instance which is registered through this constructor, and the barrier's master node may be different. The barriers master node maintains the barrier state. The user of the barrier has to ensure that the given master node has at least one instance of the barrier.

Parameters

localNode	the local node to register the barrier with.
masterNodeID	the master node identifier.
height	the initial group size for the barrier.

See also: isGood()

Version: 1.1.1

CO_API co::Barrier::Barrier	(	LocalNodePtr	localNode,
		const ObjectVersion &	barrier
	)

Construct and join a distributed barrier.

Parameters

localNode	the local node to map the barrier to
barrier	the identifier and version of the barrier

See also: isGood()

Version: 1.1.1

virtual CO_API co::Barrier::~Barrier ( )

virtual

Destruct the barrier.

Version: 1.0

Member Function Documentation

void co::Barrier::applyInstanceData ( DataIStream & is )

overrideprotectedvirtual

Deserialize the instance data.

This method is called during object mapping to populate slave instances with the master object's data.

Parameters

is	the input stream.

Version: 1.0

Implements co::Object.

CO_API bool co::Barrier::enter ( const uint32_t timeout = LB_TIMEOUT_INDEFINITE )

Enter the barrier, blocks until the barrier has been reached.

The implementation currently assumes that the master node instance also enters the barrier.

Returns: true on success, false on timeout or error.

Version: 1.0

ChangeType co::Barrier::getChangeType ( ) const

inlineoverrideprotectedvirtual

Returns: how the changes are to be handled.

Version: 1.0

Reimplemented from co::Object.

Definition at line 119 of file barrier.h.

References co::Object::DELTA.

CO_API uint32_t co::Barrier::getHeight ( ) const

Returns: the number of participants.

Version: 1.0

void co::Barrier::getInstanceData ( DataOStream & os )

overrideprotectedvirtual

Serialize all instance information of this distributed object.

Parameters

os	The output stream.

Version: 1.0

Implements co::Object.

CO_API void co::Barrier::increase ( )

Add one participant to the barrier.

Version: 1.0

bool co::Barrier::isGood ( ) const

inline

Returns: true if the barrier was created successfully.

Version: 1.1.1

Definition at line 89 of file barrier.h.

References co::Object::isAttached().

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void co::Barrier::pack ( DataOStream & os )

overrideprotectedvirtual

Serialize the modifications since the last call to commit().

No new version will be created if no data is written to the output stream.

Parameters

os	the output stream.

Version: 1.0

Reimplemented from co::Object.

CO_API void co::Barrier::setHeight ( const uint32_t height )

Set the number of participants in the barrier.

Version: 1.0

void co::Barrier::unpack ( DataIStream & is )

overrideprotectedvirtual

Deserialize a change.

Parameters

is	the input data stream.

Version: 1.0

Reimplemented from co::Object.

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

barrier.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation