RAM cached and tiled raster band blocks manager. More...

#include <CachedBandBlocksManager.h>

Inheritance diagram for te::mem::CachedBandBlocksManager:

Classes
class	BlockIndex
	Internal blocks indexes. More...

class	ThreadParameters
	Internal read/write thread execution parameters. More...

Public Member Functions
	CachedBandBlocksManager ()

void	free ()

void *	getBlockPointer (unsigned int band, unsigned int x, unsigned int y)
	Returns a pointer to the required data block. More...

unsigned int	getDataPrefetchThreshold () const
	The read-ahead data prefetch threshold. More...

unsigned int	getMaxNumberOfCacheBlocks () const
	The maximum number of cache blocks. More...

te::rst::Raster *	getRaster () const
	Returns the associated raster. More...

bool	initialize (const te::rst::Raster &externalRaster, const unsigned char maxMemPercentUsed, const unsigned int dataPrefetchThreshold)
	Initialize this instance to an initial state. More...

bool	initialize (const unsigned int maxNumberOfCacheBlocks, const te::rst::Raster &externalRaster, const unsigned int dataPrefetchThreshold)
	Initialize this instance to an initial state. More...

bool	isInitialized () const
	Returns true if this instance is initialized. More...

	~CachedBandBlocksManager ()

Static Protected Member Functions
static void	threadEntry (ThreadParameters *paramsPtr)
	Thread entry. More...

Protected Attributes
std::vector< BlockIndex >	m_blocksFifo
	blocks swap FIFO. More...

unsigned int	m_blocksFifoNextSwapBlockIndex
	The next block swapp index over m_blocksFifo. More...

std::vector< unsigned char * >	m_blocksHandler
	Cache blocks handler. More...

std::vector< std::vector< std::vector< unsigned char * > > >	m_blocksPointers
	3D Matrix of block pointers indexed as [band][blockYIndex][blockXIndex]. More...

unsigned int	m_dataPrefetchThreshold
	The read-ahead data prefetch threshold (0-will disable prefetch, 1-data always prefetched, higher values will do prefetch when necessary). More...

unsigned char *	m_getBlockPointer_BlkPtr

unsigned int	m_globalBlockSizeBytes
	The maximum block size for all bands. More...

unsigned int	m_globalBlocksNumberX
	The maximum number of blocks (X axis) for all bands. More...

unsigned int	m_globalBlocksNumberY
	The maximum number of blocks (Y axis) for all bands. More...

unsigned int	m_maxNumberOfCacheBlocks
	The maximum number of cache blocks. More...

te::rst::Raster *	m_rasterPtr
	External raster pointer. More...

std::unique_ptr< boost::thread >	m_threadHandler
	The internal thread handler. More...

ThreadParameters	m_threadParams
	The internal thread execution parameters. More...

Private Member Functions
void	initState ()
	Initialize this instance to an initial state. More...

Detailed Description

RAM cached and tiled raster band blocks manager.

Definition at line 51 of file CachedBandBlocksManager.h.

Constructor & Destructor Documentation

te::mem::CachedBandBlocksManager::CachedBandBlocksManager ( )

Definition at line 47 of file CachedBandBlocksManager.cpp.

References initState().

te::mem::CachedBandBlocksManager::~CachedBandBlocksManager ( )

Definition at line 52 of file CachedBandBlocksManager.cpp.

References free().

Member Function Documentation

void te::mem::CachedBandBlocksManager::free ( )

Note: Free all allocated internal resources and go back to the initial state.

Definition at line 155 of file CachedBandBlocksManager.cpp.

References te::rst::Raster::getAccessPolicy(), te::rst::Raster::getBand(), initState(), m_blocksFifo, m_blocksHandler, m_blocksPointers, m_dataPrefetchThreshold, te::mem::CachedBandBlocksManager::ThreadParameters::m_doTaskCondVar, te::mem::CachedBandBlocksManager::ThreadParameters::m_doTaskMutex, m_globalBlocksNumberX, m_globalBlocksNumberY, m_rasterPtr, te::mem::CachedBandBlocksManager::ThreadParameters::m_task, te::mem::CachedBandBlocksManager::ThreadParameters::m_threadDataBlockHandler, m_threadHandler, m_threadParams, te::mem::CachedBandBlocksManager::ThreadParameters::SuicideTastT, te::common::WAccess, and te::rst::Band::write().

Referenced by te::mem::CachedRaster::free(), initialize(), and ~CachedBandBlocksManager().

void * te::mem::CachedBandBlocksManager::getBlockPointer	(	unsigned int	band,
		unsigned int	x,
		unsigned int	y
	)

Returns a pointer to the required data block.

Parameters

band	The band index.
x	The block-id in x (or x-offset).
y	The block-id in y (or y-offset).

Returns: Pointer to the required data block.

Definition at line 222 of file CachedBandBlocksManager.cpp.

Referenced by te::mem::CachedBand::getIValue(), te::mem::CachedBand::getValue(), te::mem::CachedBand::read(), te::mem::CachedBand::setIValue(), te::mem::CachedBand::setValue(), and te::mem::CachedBand::write().

unsigned int te::mem::CachedBandBlocksManager::getDataPrefetchThreshold ( ) const

inline

The read-ahead data prefetch threshold.

Definition at line 129 of file CachedBandBlocksManager.h.

Referenced by te::mem::CachedRaster::clone().

unsigned int te::mem::CachedBandBlocksManager::getMaxNumberOfCacheBlocks ( ) const

inline

The maximum number of cache blocks.

Definition at line 123 of file CachedBandBlocksManager.h.

Referenced by te::mem::CachedRaster::clone().

te::rst::Raster* te::mem::CachedBandBlocksManager::getRaster ( ) const

inline

Returns the associated raster.

Definition at line 117 of file CachedBandBlocksManager.h.

Referenced by te::mem::CachedBand::CachedBand(), and te::mem::CachedRaster::clone().

bool te::mem::CachedBandBlocksManager::initialize	(	const te::rst::Raster &	externalRaster,
		const unsigned char	maxMemPercentUsed,
		const unsigned int	dataPrefetchThreshold
	)

Initialize this instance to an initial state.

Parameters

externalRaster	The external raster where the data will be read/written.
maxMemPercentUsed	The maximum free memory percentual to use valid range: [1:100].
dataPrefetchThreshold	The read-ahead data prefetch threshold (0-will disable prefetch, 1-data always prefetched, higher values will do prefetch when necessary).

Returns: true if OK, false on errors.

Definition at line 57 of file CachedBandBlocksManager.cpp.

References free(), te::rst::Raster::getBand(), te::rst::Band::getBlockSize(), te::rst::Raster::getNumberOfBands(), te::common::GetTotalPhysicalMemory(), te::common::GetTotalVirtualMemory(), and te::common::GetUsedVirtualMemory().

Referenced by te::mem::CachedRaster::CachedRaster().

bool te::mem::CachedBandBlocksManager::initialize	(	const unsigned int	maxNumberOfCacheBlocks,
		const te::rst::Raster &	externalRaster,
		const unsigned int	dataPrefetchThreshold
	)

Initialize this instance to an initial state.

Parameters

externalRaster	The external raster where the data will be read/written.
maxNumberOfCacheBlocks	The maximum number of cache blocks.
dataPrefetchThreshold	The read-ahead data prefetch threshold (0-will disable prefetch, 1-data always prefetched, higher values will do prefetch when necessary).