Store creation/destroy/query interface. More...

#include <stnode_page.h>

Public Member Functions
	stnode_cache_t (bool virgin)

PageID	get_root_pid (StoreID store) const

lsn_t	get_root_elmsn (StoreID store) const

bool	is_allocated (StoreID store) const

stnode_t	get_stnode (StoreID store) const
	Make a copy of the entire stnode_t of the given store. More...

void	get_used_stores (std::vector< StoreID > &) const
	Returns the StoreID of all allocated stores in the volume. More...

rc_t	sx_create_store (PageID root_pid, StoreID &snum) const

rc_t	sx_append_extent (StoreID store, extent_id_t ext) const

void	dump (std::ostream &out) const

extent_id_t	get_last_extent (StoreID stid) const

Private Member Functions
StoreID	get_min_unused_stid (stnode_page *spage) const

Detailed Description

Store creation/destroy/query interface.

This object handles store create/destroy/query requests for one volume. 99.99% of the requests are, of course, querying the root page ID of indexes. This object does a lightweight synchronization (latch) to protect them from MT accesses. However, this object doesn't use locks because we don't need them. If the store is being destroyed, ss_m will check intent locks before calling this object, so we are safe.

This object and vol_t replace the "directory" thingies in original Shore-MT with more efficiency and simplicity.

Constructor & Destructor Documentation

§ stnode_cache_t()

stnode_cache_t::stnode_cache_t ( bool virgin )

Member Function Documentation

§ dump()

void stnode_cache_t::dump ( std::ostream & out ) const

§ get_last_extent()

extent_id_t stnode_cache_t::get_last_extent ( StoreID stid ) const

§ get_min_unused_stid()

StoreID stnode_cache_t::get_min_unused_stid ( stnode_page * spage ) const

private

Returns the first StoreID that can be used for a new store in this volume or stnode_page::max if all available stores of this volume are already allocated.

§ get_root_elmsn()

lsn_t stnode_cache_t::get_root_elmsn ( StoreID store ) const

§ get_root_pid()

PageID stnode_cache_t::get_root_pid ( StoreID store ) const

Returns the root page ID of the given store. If that store isn't allocated, returns 0.

Parameters

[in] store Store ID.

§ get_stnode()

stnode_t stnode_cache_t::get_stnode ( StoreID store ) const

Make a copy of the entire stnode_t of the given store.

§ get_used_stores()

void stnode_cache_t::get_used_stores ( std::vector< StoreID > & ret ) const

Returns the StoreID of all allocated stores in the volume.

§ is_allocated()

bool stnode_cache_t::is_allocated ( StoreID store ) const

§ sx_append_extent()

rc_t stnode_cache_t::sx_append_extent	(	StoreID	store,
		extent_id_t	ext
	)		const

§ sx_create_store()

rc_t stnode_cache_t::sx_create_store	(	PageID	root_pid,
		StoreID &	snum
	)		const

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

src/sm/stnode_page.h
src/sm/stnode_page.cpp

Public Member Functions

Private Member Functions