MDL_map_partition Class Reference

List of all members.

Public Member Functions
	MDL_map_partition ()
	~MDL_map_partition ()
MDL_lock *	find_or_insert (const MDL_key *mdl_key, my_hash_value_type hash_value)
void	remove (MDL_lock *lock)
my_hash_value_type	get_key_hash (const MDL_key *mdl_key) const

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Detailed Description

A partition in a collection of all MDL locks. MDL_map is partitioned for scalability reasons. Maps MDL_key to MDL_lock instances.

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Constructor & Destructor Documentation

MDL_map_partition::MDL_map_partition

(

)

Initialize the partition in the container with all MDL locks.

MDL_map_partition::~MDL_map_partition

(

)

Destroy the partition in container for all MDL locks.

Precondition:

It must be empty.

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Member Function Documentation

MDL_lock * MDL_map_partition::find_or_insert	(	const MDL_key *	mdl_key,
		my_hash_value_type	hash_value
	)		[inline]

Find MDL_lock object corresponding to the key and hash value in MDL_map partition, create it if it does not exist.

Return values:

non-NULL	- Success. MDL_lock instance for the key with locked MDL_lock::m_rwlock.
NULL	- Failure (OOM).

void MDL_map_partition::remove

(

MDL_lock *

lock

)

[inline]

Destroy MDL_lock object belonging to specific MDL_map partition or delegate this responsibility to whatever thread that holds the last outstanding reference to it.

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

• mdl.cc