mongo::Lock::CollectionLock Class Reference

Collection lock with support for document-level locking. More...

#include <d_concurrency.h>

Detailed Description

Collection lock with support for document-level locking.

This lock supports four modes (see Lock_Mode): MODE_IS: concurrent collection access, requiring document level locking read locks MODE_IX: concurrent collection access, requiring document level read or write locks MODE_S: shared read access to the collection, blocking any writers MODE_X: exclusive access to the collection, blocking all other readers and writers

An appropriate DBLock must already be held before locking a collection: it is an error, checked with a dassert(), to not have a suitable database lock before locking the collection. For storage engines that do not support document-level locking, MODE_IS will be upgraded to MODE_S and MODE_IX will be upgraded to MODE_X.

Public Member Functions
	CollectionLock (Locker *lockState, StringData ns, LockMode mode, Date_t deadline=Date_t::max())
	CollectionLock (CollectionLock &&)
	~CollectionLock ()
bool	isLocked () const

Private Member Functions
	MONGO_DISALLOW_COPYING (CollectionLock)

Private Attributes
const ResourceId	_id
LockResult	_result
Locker *	_lockState

Constructor & Destructor Documentation

CollectionLock() [1/2]

mongo::Lock::CollectionLock::CollectionLock	(	Locker *	lockState,
		StringData	ns,
		LockMode	mode,
		Date_t	deadline = Date_t::max()
	)

CollectionLock() [2/2]

mongo::Lock::CollectionLock::CollectionLock

(

CollectionLock &&

otherLock

)

~CollectionLock()

mongo::Lock::CollectionLock::~CollectionLock

(

)

Member Function Documentation

isLocked()

bool mongo::Lock::CollectionLock::isLocked ( ) const

inline

MONGO_DISALLOW_COPYING()

mongo::Lock::CollectionLock::MONGO_DISALLOW_COPYING ( CollectionLock  )

private

Member Data Documentation

_id

const ResourceId mongo::Lock::CollectionLock::_id

private

_lockState

Locker* mongo::Lock::CollectionLock::_lockState

private

_result

LockResult mongo::Lock::CollectionLock::_result

private

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

• /home/louis/git/mongodbsource.github.io/src/src/mongo/db/concurrency/d_concurrency.h
• /home/louis/git/mongodbsource.github.io/src/src/mongo/db/concurrency/d_concurrency.cpp