casa::vi::VlaDatum Class Reference

VlaDatum is a single elemement in the VlaDatum buffer ring used to support the VisibilityIterator2Async. More...

#include <AsynchronousInterface2.h>

Public Types
enum	State {   Empty,   Filling,   Full,   Reading }

Public Member Functions
	VlaDatum (Subchunk)
	~VlaDatum ()
Subchunk	getSubchunk () const
VisBufferImplAsync2 *	getVisBuffer ()
casacore::Bool	isSubchunk (Subchunk) const
	const VisBufferAsync2 * getVisBuffer () const; More...
VisBufferImplAsync2 *	releaseVisBufferAsync2 ()
void	reset ()

Private Member Functions
VlaDatum &	operator= (const VlaDatum &other)
	Illegal operations. More...

Private Attributes
Subchunk	subchunk_p
VisBufferImplAsync2 *	visBuffer_p

Detailed Description

VlaDatum is a single elemement in the VlaDatum buffer ring used to support the VisibilityIterator2Async.

Intended use:

Internal

Review Status

Date Reviewed:

yyyy/mm/dd

Prerequisite

• VisBuffer
• VisBufferAsync2
• VisibilityIterator2Async
• VlaData
• VLAT

Etymology

VlaDatum is the quantum of data associated with a single position of the visibility look-ahead scheme.

Synopsis

VlaDatum is a single buffer for data produced by the VLAT thread and consumed by the main thread. A collection of VlaDatum objects is organized as a buffer ring in a VlaData object.

A VlaDatum object is responsible for maintaining its state as well as containing the set of data accessed from a single position of a VisibilityIterator2. It contains a VisibilityBufferAsync object to hold the data that will be used by the main thread; other data is maintained in member variables.

VlaDatum has no concurrency mechanisms built in it; that is handled by the VlaData object. It does support a set of states that indicate its current use: Empty -> Filling -> Full -> Reading -> Empty. Changing state is accomplished by the methods fillStart, fillComplete, readStart and readComplete.

Example

Motivation

Thrown Exceptions

• casacore::AipsError for unhandleable errors

Definition at line 250 of file AsynchronousInterface2.h.

Member Enumeration Documentation

enum casa::vi::VlaDatum::State

Enumerator
Empty
Filling
Full
Reading

Definition at line 254 of file AsynchronousInterface2.h.

Constructor & Destructor Documentation

casa::vi::VlaDatum::VlaDatum

(

Subchunk

)

casa::vi::VlaDatum::~VlaDatum

(

)

Member Function Documentation

Subchunk casa::vi::VlaDatum::getSubchunk

(

)

const

VisBufferImplAsync2* casa::vi::VlaDatum::getVisBuffer

(

)

casacore::Bool casa::vi::VlaDatum::isSubchunk

(

Subchunk

)

const

const VisBufferAsync2 * getVisBuffer () const;

VlaDatum& casa::vi::VlaDatum::operator= ( const VlaDatum &  other )

private

Illegal operations.

VisBufferImplAsync2* casa::vi::VlaDatum::releaseVisBufferAsync2

(

)

void casa::vi::VlaDatum::reset

(

)

Member Data Documentation

Subchunk casa::vi::VlaDatum::subchunk_p

private

Definition at line 271 of file AsynchronousInterface2.h.

VisBufferImplAsync2* casa::vi::VlaDatum::visBuffer_p

private

Definition at line 272 of file AsynchronousInterface2.h.

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

• casa/code/msvis/MSVis/AsynchronousInterface2.h