mongo::PointerToDurableMappedFile Class Reference

for durability support we want to be able to map pointers to specific DurableMappedFile objects. More...

#include <durable_mapped_file.h>

Detailed Description

for durability support we want to be able to map pointers to specific DurableMappedFile objects.

Public Member Functions
	PointerToDurableMappedFile ()
void	add_inlock (void *view, DurableMappedFile *f)
	register view. More...
void	remove (void *view, size_t length)
	de-register view. More...
DurableMappedFile *	find (void *p, size_t &ofs)
	find associated MMF object for a given pointer. More...
stdx::mutex &	_mutex ()
	for doing many finds in a row with one lock operation More...
DurableMappedFile *	find_inlock (void *p, size_t &ofs)
	not-threadsafe, caller must hold _mutex() More...
unsigned	numberOfViews_inlock () const
	not-threadsafe, caller must hold _mutex() More...
void	makeWritable (void *, unsigned len)
	make the private map range writable (necessary for our windows implementation) More...
void	clearWritableBits (void *privateView, size_t len)

Private Member Functions
	MONGO_DISALLOW_COPYING (PointerToDurableMappedFile)
void	clearWritableBits_inlock (void *privateView, size_t len)

Private Attributes
stdx::mutex	_m
std::map< void *, DurableMappedFile * >	_views

Constructor & Destructor Documentation

PointerToDurableMappedFile()

mongo::PointerToDurableMappedFile::PointerToDurableMappedFile

(

)

Member Function Documentation

_mutex()

stdx::mutex& mongo::PointerToDurableMappedFile::_mutex ( )

inline

for doing many finds in a row with one lock operation

add_inlock()

void mongo::PointerToDurableMappedFile::add_inlock	(	void *	view,
		DurableMappedFile *	f
	)

register view.

not-threadsafe, caller must hold _mutex()

threadsafe

clearWritableBits()

void mongo::PointerToDurableMappedFile::clearWritableBits	(	void *	privateView,
		size_t	len
	)

clearWritableBits_inlock()

void mongo::PointerToDurableMappedFile::clearWritableBits_inlock ( void *  privateView, size_t  len  )

private

find()

DurableMappedFile * mongo::PointerToDurableMappedFile::find	(	void *	p,
		size_t &	ofs
	)

find associated MMF object for a given pointer.

threadsafe

Parameters

ofs	out returns offset into the view of the pointer, if found.

Returns

the DurableMappedFile to which this pointer belongs. null if not found.

find_inlock()

DurableMappedFile * mongo::PointerToDurableMappedFile::find_inlock	(	void *	p,
		size_t &	ofs
	)

not-threadsafe, caller must hold _mutex()

underscore version of find is for when you are already locked

Parameters

ofs	out return our offset in the view

Returns

the DurableMappedFile to which this pointer belongs

makeWritable()

void mongo::PointerToDurableMappedFile::makeWritable ( void *  _p, unsigned  len  )

inline

make the private map range writable (necessary for our windows implementation)

MONGO_DISALLOW_COPYING()

mongo::PointerToDurableMappedFile::MONGO_DISALLOW_COPYING ( PointerToDurableMappedFile  )

private

numberOfViews_inlock()

unsigned mongo::PointerToDurableMappedFile::numberOfViews_inlock ( ) const

inline

not-threadsafe, caller must hold _mutex()

remove()

void mongo::PointerToDurableMappedFile::remove	(	void *	view,
		size_t	len
	)

de-register view.

threadsafe

Member Data Documentation

_m

stdx::mutex mongo::PointerToDurableMappedFile::_m

private

_views

std::map<void*, DurableMappedFile*> mongo::PointerToDurableMappedFile::_views

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