Mmapping Class Reference

Collaboration diagram for Mmapping:

Public Member Functions
	Mmapping (int fd, size_t length, int prot, int flags, off_t offset)
	~Mmapping ()
void *	map ()
	calls mmap(2); returns usable buffer or nil on failure More...
bool	unmap ()
	unmaps previously mapped buffer, if any More...

Private Attributes
const int	fd
	descriptor of the mmapped file More...
const size_t	length
	user-requested data length, needed for munmap More...
const int	prot
	mmap(2) "protection" flags More...
const int	flags
	other mmap(2) flags More...
const off_t	offset
	user-requested data offset More...
off_t	delta
	mapped buffer increment to hit user offset More...
void *	buf
	buffer returned by mmap, needed for munmap More...

Detailed Description

Definition at line 36 of file MmappedFile.cc.

Constructor & Destructor Documentation

Mmapping()

Mmapping::Mmapping	(	int	fd,
		size_t	length,
		int	prot,
		int	flags,
		off_t	offset
	)

Definition at line 220 of file MmappedFile.cc.

~Mmapping()

Mmapping::~Mmapping

(

)

Definition at line 226 of file MmappedFile.cc.

References buf, and unmap().

Member Function Documentation

map()

void * Mmapping::map

(

)

Definition at line 233 of file MmappedFile.cc.

References buf, debugs, delta, fd, flags, length, offset, prot, and xstrerr().

Referenced by MmappedFile::read().

unmap()

bool Mmapping::unmap

(

)

Definition at line 253 of file MmappedFile.cc.

References buf, debugs, delta, error(), fd, length, and xstrerr().

Referenced by MmappedFile::read(), and ~Mmapping().

Member Data Documentation

buf

void* Mmapping::buf

private

Definition at line 53 of file MmappedFile.cc.

Referenced by map(), unmap(), and ~Mmapping().

delta

off_t Mmapping::delta

private

Definition at line 52 of file MmappedFile.cc.

Referenced by map(), and unmap().

fd

const int Mmapping::fd

private

Definition at line 46 of file MmappedFile.cc.

Referenced by map(), and unmap().

flags

const int Mmapping::flags

private

Definition at line 49 of file MmappedFile.cc.

Referenced by map().

length

const size_t Mmapping::length

private

Definition at line 47 of file MmappedFile.cc.

Referenced by map(), and unmap().

offset

const off_t Mmapping::offset

private

Definition at line 50 of file MmappedFile.cc.

Referenced by map().

prot

const int Mmapping::prot

private

Definition at line 48 of file MmappedFile.cc.

Referenced by map().

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

• src/DiskIO/Mmapped/MmappedFile.cc