mongo::NamespaceHashTable Class Reference

Simple, fixed size hash table used for namespace mapping (effectively the contents of the MMAP V1 .ns file). More...

#include <hashtab.h>

Detailed Description

Simple, fixed size hash table used for namespace mapping (effectively the contents of the MMAP V1 .ns file).

Uses a contiguous block of memory, so you can put it in a memory mapped file very easily.

Classes
struct	Node

Public Types
typedef stdx::function< void(const Namespace &k, NamespaceDetails &v)>	IteratorCallback

Public Member Functions
	NamespaceHashTable (void *buf, int buflen, const char *name)
NamespaceDetails *	get (const Namespace &k) const
void	kill (OperationContext *opCtx, const Namespace &k)
bool	put (OperationContext *opCtx, const Namespace &k, const NamespaceDetails &value)
	returns false if too full More...
void	iterAll (IteratorCallback callback)

Private Member Functions
	MONGO_DISALLOW_COPYING (NamespaceHashTable)
	MONGO_STATIC_ASSERT (sizeof(Node)==628)
int	_find (const Namespace &k, bool &found) const
Node &	_nodes (int i) const

Private Attributes
const char *	_name
void *const	_buf
int	n
int	maxChain

Member Typedef Documentation

IteratorCallback

typedef stdx::function<void(const Namespace& k, NamespaceDetails& v)> mongo::NamespaceHashTable::IteratorCallback

Constructor & Destructor Documentation

NamespaceHashTable()

mongo::NamespaceHashTable::NamespaceHashTable	(	void *	buf,
		int	buflen,
		const char *	name
	)

Member Function Documentation

_find()

int mongo::NamespaceHashTable::_find ( const Namespace &  k, bool &  found  ) const

private

_nodes()

Node& mongo::NamespaceHashTable::_nodes ( int  i ) const

inlineprivate

get()

NamespaceDetails* mongo::NamespaceHashTable::get ( const Namespace &  k ) const

inline

iterAll()

void mongo::NamespaceHashTable::iterAll ( IteratorCallback  callback )

inline

kill()

void mongo::NamespaceHashTable::kill ( OperationContext *  opCtx, const Namespace &  k  )

inline

MONGO_DISALLOW_COPYING()

mongo::NamespaceHashTable::MONGO_DISALLOW_COPYING ( NamespaceHashTable  )

private

MONGO_STATIC_ASSERT()

mongo::NamespaceHashTable::MONGO_STATIC_ASSERT ( sizeof(Node)  = =628 )

private

put()

bool mongo::NamespaceHashTable::put ( OperationContext *  opCtx, const Namespace &  k, const NamespaceDetails &  value  )

inline

returns false if too full

Member Data Documentation

_buf

void* const mongo::NamespaceHashTable::_buf

private

_name

const char* mongo::NamespaceHashTable::_name

private

maxChain

int mongo::NamespaceHashTable::maxChain

private

n

int mongo::NamespaceHashTable::n

private

---

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

• /home/louis/git/mongodbsource.github.io/src/src/mongo/db/storage/mmap_v1/catalog/hashtab.h
• /home/louis/git/mongodbsource.github.io/src/src/mongo/db/storage/mmap_v1/catalog/hashtab.cpp