Detailed Description

Block manager class.

Manages allocation and deallocation of blocks in multiple/single disk setting

Remarks: is a singleton

Definition at line 63 of file block_manager.h.

Inheritance diagram for stxxl::block_manager:

Collaboration diagram for stxxl::block_manager:

Public Member Functions
	~block_manager ()

template<unsigned BLK_SIZE>
void	delete_block (const BID< BLK_SIZE > &bid)
	Deallocates a block. More...

template<class BIDIteratorClass >
void	delete_blocks (const BIDIteratorClass &bidbegin, const BIDIteratorClass &bidend)
	Deallocates blocks. More...

uint64	get_current_allocation () const
	return currently allocated bytes More...

uint64	get_free_bytes () const
	Return total number of free disk allocations. More...

uint64	get_maximum_allocation () const
	return maximum number of bytes allocated during program run. More...

uint64	get_total_allocation () const
	return total requested allocation in bytes More...

uint64	get_total_bytes () const
	return total number of bytes available in all disks More...

template<typename DiskAssignFunctor , unsigned BLK_SIZE>
void	new_block (const DiskAssignFunctor &functor, BID< BLK_SIZE > &bid, unsigned_type offset=0)
	Allocates a new block according to the strategy given by functor and stores the block identifier to bid. Allocation will be lined up with previous partial allocations of offset blocks. More...

template<class DiskAssignFunctor , class BIDIteratorClass >
void	new_blocks (const DiskAssignFunctor &functor, BIDIteratorClass bidbegin, BIDIteratorClass bidend, unsigned_type offset=0)
	Allocates new blocks. More...

template<class BlockType , class DiskAssignFunctor , class BIDIteratorClass >
void	new_blocks (const unsigned_type nblocks, const DiskAssignFunctor &functor, BIDIteratorClass out, unsigned_type offset=0)
	Allocates new blocks according to the strategy given by functor and stores block identifiers to the output iterator out Allocation will be lined up with previous partial allocations of offset blocks. More...

template<class BIDType , class DiskAssignFunctor , class OutputIterator >
void	new_blocks_int (const unsigned_type nblocks, const DiskAssignFunctor &functor, unsigned_type offset, OutputIterator out)

Protected Member Functions
template<class BIDType , class DiskAssignFunctor , class BIDIteratorClass >
void	new_blocks_int (const unsigned_type nblocks, const DiskAssignFunctor &functor, unsigned_type offset, BIDIteratorClass out)

Private Member Functions
	block_manager ()

Private Attributes
disk_allocator **	disk_allocators

file **	disk_files

uint64	m_current_allocation
	currently allocated bytes More...

uint64	m_maximum_allocation
	maximum number of bytes allocated during program run. More...

uint64	m_total_allocation
	total requested allocation in bytes More...

size_t	ndisks

Additional Inherited Members
Static Public Member Functions inherited from stxxl::singleton< block_manager >
static instance_pointer	get_instance ()

Constructor & Destructor Documentation

stxxl::block_manager::block_manager ( )

private

Definition at line 32 of file block_manager.cpp.

References stxxl::config::check_initialized(), stxxl::create_file(), stxxl::config::disk(), stxxl::config::disks_number(), stxxl::disk_config::fileio_string(), stxxl::disk_config::path, stxxl::disk_config::queue, stxxl::disk_config::size, and STXXL_MSG.

stxxl::block_manager::~block_manager ( )

Definition at line 89 of file block_manager.cpp.

References STXXL_VERBOSE1.

Member Function Documentation

uint64 stxxl::block_manager::get_current_allocation ( ) const

inline

return currently allocated bytes

Definition at line 178 of file block_manager.h.

uint64 stxxl::block_manager::get_free_bytes ( ) const

Return total number of free disk allocations.

Definition at line 112 of file block_manager.cpp.

uint64 stxxl::block_manager::get_maximum_allocation ( ) const

inline

return maximum number of bytes allocated during program run.

Definition at line 182 of file block_manager.h.

uint64 stxxl::block_manager::get_total_allocation ( ) const

inline

return total requested allocation in bytes

Definition at line 174 of file block_manager.h.

uint64 stxxl::block_manager::get_total_bytes ( ) const

return total number of bytes available in all disks

Definition at line 102 of file block_manager.cpp.

template<typename DiskAssignFunctor , unsigned BLK_SIZE>

void stxxl::block_manager::new_block	(	const DiskAssignFunctor &	functor,
		BID< BLK_SIZE > &	bid,
		unsigned_type	offset = `0`
	)

inline

Allocates a new block according to the strategy given by functor and stores the block identifier to bid. Allocation will be lined up with previous partial allocations of offset blocks.

Parameters

functor	object of model of allocation_strategy concept
bid	BID to store the block identifier
offset	advance for functor to line up partial allocations

Definition at line 152 of file block_manager.h.

Referenced by stxxl::ksort(), stxxl::ksort_local::ksort_blocks(), stxxl::sort(), and stxxl::sort_local::sort_blocks().

template<class DiskAssignFunctor , class BIDIteratorClass >

void stxxl::block_manager::new_blocks	(	const DiskAssignFunctor &	functor,
		BIDIteratorClass	bidbegin,
		BIDIteratorClass	bidend,
		unsigned_type	offset = `0`
	)

inline

Allocates new blocks.

Allocates new blocks according to the strategy given by functor and stores block identifiers to the range [ bidbegin, bidend) Allocation will be lined up with previous partial allocations of offset blocks.

Parameters

functor	object of model of allocation_strategy concept
bidbegin	bidirectional BID iterator object
bidend	bidirectional BID iterator object
offset	advance for functor to line up partial allocations

Definition at line 111 of file block_manager.h.

Referenced by stxxl::stream::basic_runs_creator< Input_, CompareType_, BlockSize_, AllocStr_ >::compute_result(), stxxl::stream::runs_creator< use_push< ValueType_ >, CompareType_, BlockSize_, AllocStr_ >::compute_result(), stxxl::stream::runs_creator< from_sorted_sequences< ValueType_ >, CompareType_, BlockSize_, AllocStr_ >::finish(), stxxl::priority_queue_local::ext_merger< BlockType_, Cmp_, Arity_, AllocStr_ >::insert_segment(), stxxl::ksort_local::ksort_blocks(), stxxl::stream::basic_runs_merger< RunsType_, CompareType_, AllocStr_ >::merge_recursively(), stxxl::stable_ksort_local::bid_sequence< BIDType_, AllocStrategy_ >::operator[](), stxxl::stream::runs_creator< use_push< ValueType_ >, CompareType_, BlockSize_, AllocStr_ >::push(), stxxl::stream::runs_creator< from_sorted_sequences< ValueType_ >, CompareType_, BlockSize_, AllocStr_ >::push(), and stxxl::sort_local::sort_blocks().

template<class BlockType , class DiskAssignFunctor , class BIDIteratorClass >

void stxxl::block_manager::new_blocks	(	const unsigned_type	nblocks,
		const DiskAssignFunctor &	functor,
		BIDIteratorClass	out,
		unsigned_type	offset = `0`
	)

inline

Allocates new blocks according to the strategy given by functor and stores block identifiers to the output iterator out Allocation will be lined up with previous partial allocations of offset blocks.

Parameters

nblocks	the number of blocks to allocate
functor	object of model of allocation_strategy concept
out	iterator object of OutputIterator concept
offset	advance for functor to line up partial allocations

The BlockType template parameter defines the type of block to allocate

Definition at line 133 of file block_manager.h.

template<class BIDType , class DiskAssignFunctor , class BIDIteratorClass >

void stxxl::block_manager::new_blocks_int	(	const unsigned_type	nblocks,
		const DiskAssignFunctor &	functor,
		unsigned_type	offset,
		BIDIteratorClass	out
	)

protected

Member Data Documentation

disk_allocator** stxxl::block_manager::disk_allocators

private

Definition at line 67 of file block_manager.h.

file** stxxl::block_manager::disk_files

private

Definition at line 68 of file block_manager.h.

uint64 stxxl::block_manager::m_current_allocation

private

currently allocated bytes

Definition at line 78 of file block_manager.h.

uint64 stxxl::block_manager::m_maximum_allocation

private

maximum number of bytes allocated during program run.

Definition at line 81 of file block_manager.h.

uint64 stxxl::block_manager::m_total_allocation

private

total requested allocation in bytes

Definition at line 75 of file block_manager.h.

size_t stxxl::block_manager::ndisks

private

Definition at line 70 of file block_manager.h.

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

include/stxxl/bits/mng/block_manager.h
lib/mng/block_manager.cpp

Detailed Description

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation