Detailed Description

Block manager class.

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

Remarks: is a singleton

Definition at line 54 of file block_manager.hpp.

Inheritance diagram for block_manager:

Collaboration diagram for block_manager:

#include <block_manager.hpp>

Public Member Functions
	~block_manager ()

template<size_t BlockSize>
void	delete_block (const BID< BlockSize > &bid)

template<typename BIDIterator >
void	delete_blocks (const BIDIterator &bid_begin, const BIDIterator &bid_end)

template<typename DiskAssignFunctor , size_t BlockSize>
void	new_block (const DiskAssignFunctor &functor, BID< BlockSize > &bid, size_t alloc_offset=0)
	Allocates a new block according to the strategy given by functor and stores the block identifier to bid. More...

template<typename DiskAssignFunctor , typename BIDIterator >
void	new_blocks (const DiskAssignFunctor &functor, BIDIterator bid_begin, BIDIterator bid_end, size_t alloc_offset=0)
	Allocates new blocks. More...

Statistics
uint64_t	total_bytes () const
	return total number of bytes available in all disks More...

uint64_t	free_bytes () const
	Return total number of free bytes. More...

uint64_t	total_allocation () const
	return total requested allocation in bytes More...

uint64_t	current_allocation () const
	return currently allocated bytes More...

uint64_t	maximum_allocation () const
	return maximum number of bytes allocated during program run. More...

Public Member Functions inherited from singleton< block_manager >
	singleton ()=default

	singleton (const singleton &)=delete
	non-copyable: delete copy-constructor More...

singleton &	operator= (const singleton &)=delete
	non-copyable: delete assignment operator More...

Private Member Functions
	block_manager ()
	private construction from singleton More...

Private Attributes
tlx::simple_vector< disk_block_allocator * >	block_allocators_
	one block allocator per disk More...

uint64_t	current_allocation_ = 0
	currently allocated bytes More...

tlx::simple_vector< file_ptr >	disk_files_
	vector of opened disk files More...

uint64_t	maximum_allocation_ = 0
	maximum number of bytes allocated during program run. More...

std::mutex	mutex_
	protect internal data structures More...

size_t	ndisks_
	number of managed disks More...

uint64_t	total_allocation_ = 0
	total requested allocation in bytes More...

Static Private Attributes
static constexpr bool	debug = false

static constexpr bool	verbose_block_life_cycle = false
	log creation and destruction of blocks More...

Additional Inherited Members
Public Types inherited from singleton< block_manager >
using	instance_pointer = instance_type *

using	instance_type = block_manager

using	volatile_instance_pointer = volatile instance_pointer

Static Public Member Functions inherited from singleton< block_manager >
static instance_pointer	create_instance ()
	create instance of SubInstanceType and move into singleton More...

static void	destroy_instance ()
	destroy singleton and mark as invalid More...

static instance_pointer	get_instance ()
	return instance or create base instance if empty More...

static instance_type &	get_ref ()

Constructor & Destructor Documentation

◆ ~block_manager()

~block_manager ( )

Definition at line 86 of file block_manager.cpp.

References block_manager::block_allocators_, block_manager::disk_files_, block_manager::ndisks_, and TLX_LOG.

Referenced by block_manager::new_block().

◆ block_manager()

block_manager ( )

private

private construction from singleton

Definition at line 33 of file block_manager.cpp.

References block_manager::block_allocators_, config::check_initialized(), file::CREAT, foxxll::create_file(), file::DEFAULT_QUEUE, config::disk(), block_manager::disk_files_, config::disks_number(), disk_config::fileio_string(), singleton< config >::get_instance(), singleton< disk_queues >::get_instance(), block_manager::ndisks_, disk_config::path, disk_config::queue, file::RDWR, disk_config::size, and TLX_LOG1.

Member Function Documentation

◆ current_allocation()

uint64_t current_allocation ( ) const

return currently allocated bytes

Definition at line 127 of file block_manager.cpp.

References block_manager::current_allocation_, and block_manager::mutex_.

Referenced by block_manager::new_block().

◆ free_bytes()

uint64_t free_bytes ( ) const

Return total number of free bytes.

Definition at line 109 of file block_manager.cpp.

References block_manager::block_allocators_, block_manager::mutex_, and block_manager::ndisks_.

Referenced by block_manager::new_block().

◆ maximum_allocation()

uint64_t maximum_allocation ( ) const

return maximum number of bytes allocated during program run.

Definition at line 133 of file block_manager.cpp.

References block_manager::maximum_allocation_, and block_manager::mutex_.

Referenced by Context::Launch(), and block_manager::new_block().

◆ new_block()

void new_block	(	const DiskAssignFunctor &	functor,
		BID< BlockSize > &	bid,
		size_t	alloc_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 alloc_offset blocks.

Parameters

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

Definition at line 91 of file block_manager.hpp.

References block_manager::current_allocation(), block_manager::delete_block(), block_manager::delete_blocks(), block_manager::free_bytes(), block_manager::maximum_allocation(), block_manager::new_blocks(), block_manager::total_allocation(), block_manager::total_bytes(), and block_manager::~block_manager().

Referenced by swappable_block< ValueType, BlockSize >::get_external_block().