Btree_multi::Bulk_extent_allocator::Extent_cache Struct Reference

Public Member Functions
void	init (size_t max_range)
	Initialize cache. More...
bool	is_empty () const
bool	is_full () const
bool	check (size_t &num_alloc, size_t &num_free) const
	Check for number of extents to be allocated and cached. More...
bool	get_range (Page_range_t &range, bool &alloc_trigger)
	Get one page range from the cache. More...
void	set_range (size_t index, Page_range_t &range)
	Set allocated range(extent) in cache. More...

Public Attributes
std::array< Page_range_t, S_MAX_RANGES >	m_ranges
	Cached page ranges already allocated to the segment. More...
size_t	m_max_range = S_MAX_RANGES
	Maximum number of ranges to pre-allocate. More...
std::atomic< size_t >	m_num_allocated {0}
	Total number of ranges allocated. More...
std::atomic< size_t >	m_num_consumed {0}
	Total number of ranges allocated. More...

Member Function Documentation

check()

bool Btree_multi::Bulk_extent_allocator::Extent_cache::check	(	size_t &	num_alloc,
		size_t &	num_free
	)		const

Check for number of extents to be allocated and cached.

Parameters

[out]	num_alloc	number of extents to allocate
[out]	num_free	number of free extents

Returns

true if succesful.

get_range()

bool Btree_multi::Bulk_extent_allocator::Extent_cache::get_range	(	Page_range_t &	range,
		bool &	alloc_trigger
	)

Get one page range from the cache.

Parameters

[out]	range	the allocated page range
[out]	alloc_trigger	true, if need to trigger allocator

Returns

true if extent is successfully returned from cache.

init()

void Btree_multi::Bulk_extent_allocator::Extent_cache::init

(

size_t

max_range

)

Initialize cache.

Parameters

[in]

max_range

maximum number of extents to cache.

is_empty()

bool Btree_multi::Bulk_extent_allocator::Extent_cache::is_empty ( void  ) const

inline

Returns

true if no available extent to consume.

is_full()

bool Btree_multi::Bulk_extent_allocator::Extent_cache::is_full ( ) const

inline

Returns

true if cache is full and no more extents can be added.

set_range()

void Btree_multi::Bulk_extent_allocator::Extent_cache::set_range	(	size_t	index,
		Page_range_t &	range
	)

Set allocated range(extent) in cache.

Parameters

[in]	index	position of the range
[in]	range	page range to be set

Member Data Documentation

m_max_range

size_t Btree_multi::Bulk_extent_allocator::Extent_cache::m_max_range = S_MAX_RANGES

Maximum number of ranges to pre-allocate.

m_num_allocated

std::atomic<size_t> Btree_multi::Bulk_extent_allocator::Extent_cache::m_num_allocated {0}

Total number of ranges allocated.

m_num_consumed

std::atomic<size_t> Btree_multi::Bulk_extent_allocator::Extent_cache::m_num_consumed {0}

Total number of ranges allocated.

m_ranges

std::array<Page_range_t, S_MAX_RANGES> Btree_multi::Bulk_extent_allocator::Extent_cache::m_ranges

Cached page ranges already allocated to the segment.

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

• storage/innobase/include/btr0mtib.h
• storage/innobase/btr/btr0mtib.cc