Meta::MProc Class Reference

Graph-based chaining/signalling and light-weight concurrent processing. More...

#include <MProc.h>

Inheritance diagram for Meta::MProc:

List of all members.

Public Types
typedef MMap< int, mvar >	SignalMap
typedef MVector< int >	IdVec
Public Member Functions
	MProc ()
virtual	~MProc ()
void	queue (MProcTask *task, MProc::SignalMap *signalMap=0, double priority=0, const mtime *time=0)
virtual bool	activate (SignalMap &signalMap)
virtual mvar	run (SignalMap &signalMap)
void	run (SignalMap *signalMap)
virtual int	connect (MProc *mp, const mvar &data=undef)
virtual void	connect (int outId, int inId, MProc *mp, const mvar &data=undef)
virtual void	disconnect (int outId)
virtual void	disconnect ()
virtual void	detach ()
virtual void	signal (int outId)
virtual void	signal (int outId, const mvar &v)
virtual void	signal (int outId, const mvar &v, double priority, bool persist=true, const mtime *time=0)
virtual void	signalAll ()
virtual void	signalAll (const mvar &v)
virtual void	signalAll (const mvar &v, double priority, bool persist=true, const mtime *time=0)
const IdVec &	outEdges () const
const IdVec &	inEdges () const
bool	isThreaded () const
void	setThreaded (bool flag)
bool	terminate (bool block=true)
bool	hasTerminated () const
void	reset ()
MProc *	outEdge (int outId)
MProc *	inEdge (int inId)
const MProc *	outEdge (int outId) const
const MProc *	inEdge (int inId) const
int	inId (int outId) const
int	outId (int inId) const
const mvar &	edgeData (int outId) const
void	setEdgeData (int outId, const mvar &v)

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Detailed Description

Graph-based chaining/signalling and light-weight concurrent processing.

MProc provides a base class for creating a graph-based system or "network" of light-weight concurrent processes. It provides a thread abstraction which is useful in a variety of situations, e.g: recurrent processes, processes which are made up of several stages whereby some of the stages trigger others which may run parallel. MProc's are connected to one another and signal each other with mvar's. Signalling results in an attempt to activate() the MProc, according to an application-specific criteria. When an MProc is activated it is queued in an MProcTask to be run.

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Constructor & Destructor Documentation

Meta::MProc::MProc

(

)

Constructor.

virtual Meta::MProc::~MProc

(

)

[virtual]

Destructor.

---

Member Function Documentation

virtual bool Meta::MProc::activate

(

SignalMap &

signalMap

)

[virtual]

Application specific activation function which is called whenever an MProc is signalled. The default behavior is to activate upon receiving signals from all input edges.

Returns:

true if this MProc is to be activated.

virtual void Meta::MProc::connect	(	int	outId,
		int	inId,
		MProc *	mp,
		const mvar &	data = undef
	)			[virtual]

Connect as an output edge the MProc mp, specifying the outId on this MProc and inId on mp.

Parameters:

data

Associate additional application-specific data with the edge created.

virtual int Meta::MProc::connect	(	MProc *	mp,
		const mvar &	data = undef
	)			[virtual]

Connect as an output edge the MProc mp.

Parameters:

data

Associates additional application-specific data with the edge to be created.

Returns:

The out id allocated for this edge.

virtual void Meta::MProc::detach

(

)

[virtual]

Sever all inputs edges.

virtual void Meta::MProc::disconnect

(

)

[virtual]

Sever all output edges.

virtual void Meta::MProc::disconnect

(

int

outId

)

[virtual]

Sever an output edge referred to by outId.

Returns:

The input id associated with the edge disconnected.

const mvar& Meta::MProc::edgeData

(

int

outId

)

const

Get the edge data associated with an output edge.

bool Meta::MProc::hasTerminated

(

)

const

Check the termination status of this MProc.

Returns:

true is this thread has terminated (and is now safe to delete).

const MProc* Meta::MProc::inEdge

(

int

inId

)

const

Returns:

The MProc identified by input edge inId.

MProc* Meta::MProc::inEdge

(

int

inId

)

Returns:

The MProc identified by input edge inId.

const IdVec& Meta::MProc::inEdges

(

)

const

Returns:

A vector containing the id's of all input edges.

int Meta::MProc::inId

(

int

outId

)

const

Returns:

The input id associated with the connection on the specified output id.

bool Meta::MProc::isThreaded

(

)

const

Returns:

true if this MProc may be threaded.

const MProc* Meta::MProc::outEdge

(

int

outId

)

const

Returns:

The MProc identified by output edge outId.

MProc* Meta::MProc::outEdge

(

int

outId

)

Returns:

The MProc identified by output edge outId.

const IdVec& Meta::MProc::outEdges

(

)

const

Returns:

A vector containing the id's of all output edges.

int Meta::MProc::outId

(

int

inId

)

const

Returns:

The output id associated with the connection on the specified input id.

void Meta::MProc::queue	(	MProcTask *	task,
		MProc::SignalMap *	signalMap = 0,
		double	priority = 0,
		const mtime *	time = 0
	)

Queue an MProc for execution.

Parameters:

	task	The task that will run this MProc.
	signalMap	A pointer to a signal map if any to run on. signalMap is consumed by this call -- it should not be deleted.
	priorty	Relative run priority. The MProcTask runs higher priority values first.
	time	For timed execution, or null for untimed. time is consumed by this call -- it should not be deleted.

void Meta::MProc::reset

(

)

After having been terminated, this method must be called to reset the MProc so that it may be queued or signalled again.

void Meta::MProc::run

(

SignalMap *

signalMap

)

Do not call directly.

virtual mvar Meta::MProc::run

(

SignalMap &

signalMap

)

[virtual]

Application specific run method. Default behavior is to simply return 0.

Reimplemented in Meta::MNetProc.

void Meta::MProc::setEdgeData	(	int	outId,
		const mvar &	v
	)

Set the edge data associated with an output edge.

void Meta::MProc::setThreaded

(

bool

flag

)

Set whether this MProc may be threaded -- if flag is false, this MProc always runs on the main thread.

virtual void Meta::MProc::signal	(	int	outId,
		const mvar &	v,
		double	priority,
		bool	persist = true,
		const mtime *	time = 0
	)			[virtual]

Signal an output edge with signal value v.

Parameters:

	persist	If persist is true, in the event of failure to activate, this signal will persist through subsequent activation attempts.
	time	Pass non-null for a timed execution.

virtual void Meta::MProc::signal	(	int	outId,
		const mvar &	v
	)			[virtual]

Signal an output edge with signal value v.

virtual void Meta::MProc::signal

(

int

outId

)

[virtual]

Signal an output edge with signal value undef.

virtual void Meta::MProc::signalAll	(	const mvar &	v,
		double	priority,
		bool	persist = true,
		const mtime *	time = 0
	)			[virtual]

Signal all output edges with value v. Similar to signal().

virtual void Meta::MProc::signalAll

(

const mvar &

v

)

[virtual]

Signal all output edges with value v.

virtual void Meta::MProc::signalAll

(

)

[virtual]

Signal all output edges with value from edge data.

bool Meta::MProc::terminate

(

bool

block = true

)

Cleanly terminate this MProc. Clean in the sense that it continues its run() method, but will not allowed to activate again.

Parameters:

block

If false, the MProc is terminated asynchronously.

Returns:

true If the MProc has terminated (and is now safe to delete).

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

• AndroMeta/include/Meta/MProc.h