Mmapping Class Reference

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
bool	unmap ()
	unmaps previously mapped buffer, if any

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

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

Member Data Documentation

buf

void* Mmapping::buf

private

Definition at line 53 of file MmappedFile.cc.

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

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:

• squid/src/DiskIO/Mmapped/MmappedFile.cc