MDL_scoped_lock Class Reference

Inheritance diagram for MDL_scoped_lock:

Collaboration diagram for MDL_scoped_lock:

Public Member Functions
	MDL_scoped_lock (const MDL_key *key_arg, MDL_map_partition *map_part)
virtual const bitmap_t *	incompatible_granted_types_bitmap () const
virtual const bitmap_t *	incompatible_waiting_types_bitmap () const
virtual bool	needs_notification (const MDL_ticket *ticket) const
virtual void	notify_conflicting_locks (MDL_context *ctx)
virtual bitmap_t	hog_lock_types_bitmap () const
Public Member Functions inherited from MDL_lock
bool	is_empty () const
bool	has_pending_conflicting_lock (enum_mdl_type type)
bool	can_grant_lock (enum_mdl_type type, MDL_context *requstor_ctx, bool ignore_lock_priority) const
void	reschedule_waiters ()
void	remove_ticket (Ticket_list MDL_lock::*queue, MDL_ticket *ticket)
bool	visit_subgraph (MDL_ticket *waiting_ticket, MDL_wait_for_graph_visitor *gvisitor)
	MDL_lock (const MDL_key *key_arg, MDL_map_partition *map_part)

Additional Inherited Members
Public Types inherited from MDL_lock
typedef unsigned short	bitmap_t
typedef Ticket_list::List::Iterator	Ticket_iterator
Static Public Member Functions inherited from MDL_lock
static MDL_lock *	create (const MDL_key *key, MDL_map_partition *map_part)
static void	destroy (MDL_lock *lock)
Public Attributes inherited from MDL_lock
MDL_key	key
mysql_prlock_t	m_rwlock
Ticket_list	m_granted
Ticket_list	m_waiting
ulong	m_hog_lock_count
uint	m_ref_usage
uint	m_ref_release
bool	m_is_destroyed
ulonglong	m_version
MDL_map_partition *	m_map_part

Detailed Description

An implementation of the scoped metadata lock. The only locking modes which are supported at the moment are SHARED and INTENTION EXCLUSIVE and EXCLUSIVE

Definition at line 528 of file mdl.cc.

Member Function Documentation

void MDL_scoped_lock::notify_conflicting_locks ( MDL_context *  ctx )

virtual

Notify threads holding scoped IX locks which conflict with a pending S lock.

Parameters

ctx	MDL_context for current thread.

Implements MDL_lock.

Definition at line 2124 of file mdl.cc.

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

• sql/mdl.cc