lockmgr::TableDataLockMgr Class Reference

Locks protecting table data. Read queries take a read lock, while write queries (update, delete) obtain a write lock. Note that insert queries do not currently take a write lock (to allow concurrent inserts). Instead, insert queries obtain a write lock on the table metadata to allow existing read queries to finish (and block new ones) before flushing the inserted data to disk. More...

#include <LockMgr.h>

Inheritance diagram for lockmgr::TableDataLockMgr:

Collaboration diagram for lockmgr::TableDataLockMgr:

Static Public Member Functions
static TableDataLockMgr &	instance ()
Static Public Member Functions inherited from lockmgr::TableLockMgrImpl< TableDataLockMgr >
static TableDataLockMgr &	instance ()
static WriteLock	getWriteLockForTable (const Catalog_Namespace::Catalog &cat, const std::string &table_name)
static WriteLock	getWriteLockForTable (const ChunkKey table_key)
static ReadLock	getReadLockForTable (Catalog_Namespace::Catalog &cat, const std::string &table_name)
static ReadLock	getReadLockForTable (const ChunkKey table_key)

Static Protected Attributes
static constexpr std::string_view	kind = "data"

Friends
class	TableLockMgrImpl< TableDataLockMgr >

Additional Inherited Members
Public Member Functions inherited from lockmgr::TableLockMgrImpl< TableDataLockMgr >
virtual	~TableLockMgrImpl ()=default
virtual MutexTracker *	getTableMutex (const ChunkKey table_key)
std::set< ChunkKey >	getLockedTables () const
Protected Member Functions inherited from lockmgr::TableLockMgrImpl< TableDataLockMgr >
	TableLockMgrImpl ()
virtual std::unique_ptr < heavyai::DistributedSharedMutex >	getClusterTableMutex (const ChunkKey table_key)
Protected Attributes inherited from lockmgr::TableLockMgrImpl< TableDataLockMgr >
std::mutex	map_mutex_
std::map< ChunkKey, std::unique_ptr< MutexTracker > >	table_mutex_map_

Detailed Description

Locks protecting table data. Read queries take a read lock, while write queries (update, delete) obtain a write lock. Note that insert queries do not currently take a write lock (to allow concurrent inserts). Instead, insert queries obtain a write lock on the table metadata to allow existing read queries to finish (and block new ones) before flushing the inserted data to disk.

Definition at line 76 of file LockMgr.h.

Member Function Documentation

static TableDataLockMgr& lockmgr::TableDataLockMgr::instance ( )

inlinestatic

Definition at line 78 of file LockMgr.h.

Referenced by DBHandler::execute_rel_alg(), and DBHandler::sql_execute().

                                      {
    static TableDataLockMgr data_lock_mgr;
    return data_lock_mgr;
  }

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Friends And Related Function Documentation

friend class TableLockMgrImpl< TableDataLockMgr >

friend

Definition at line 84 of file LockMgr.h.

Member Data Documentation

constexpr std::string_view lockmgr::TableDataLockMgr::kind = "data"

inlinestaticprotected

Definition at line 85 of file LockMgr.h.

Referenced by heavydb.serialized_result_set.ttypes.TTargetInfo::read(), and heavydb.serialized_result_set.ttypes.TTargetInfo::write().

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

• /home/jenkins-slave/workspace/core-os-doxygen/LockMgr/LockMgr.h