llvm::sys::fs::mapped_file_region Class Reference

This class represents a memory mapped file. More...

#include "llvm/Support/FileSystem.h"

Public Types
enum	mapmode { readonly , readwrite , priv }

Public Member Functions
	mapped_file_region ()=default
	mapped_file_region (mapped_file_region &&Moved)
mapped_file_region &	operator= (mapped_file_region &&Moved)
	mapped_file_region (const mapped_file_region &)=delete
mapped_file_region &	operator= (const mapped_file_region &)=delete
	mapped_file_region (sys::fs::file_t fd, mapmode mode, size_t length, uint64_t offset, std::error_code &ec)
	~mapped_file_region ()
	operator bool () const
	Check if this is a valid mapping.
void	unmap ()
	Unmap.
void	dontNeed ()
size_t	size () const
char *	data () const
const char *	const_data () const
	Get a const view of the data.

Static Public Member Functions
static int	alignment ()

Detailed Description

This class represents a memory mapped file.

It is based on boost::iostreams::mapped_file.

Definition at line 1266 of file FileSystem.h.

Member Enumeration Documentation

mapmode

enum llvm::sys::fs::mapped_file_region::mapmode

Enumerator
readonly	May only access map via const_data as read only.
readwrite	May access map via data and modify it. Written to path.
priv	May modify via data, but changes are lost on destruction.

Definition at line 1268 of file FileSystem.h.

Constructor & Destructor Documentation

mapped_file_region() [1/4]

llvm::sys::fs::mapped_file_region::mapped_file_region ( )

default

Referenced by unmap().

mapped_file_region() [2/4]

llvm::sys::fs::mapped_file_region::mapped_file_region ( mapped_file_region &&  Moved )

inline

Definition at line 1304 of file FileSystem.h.

mapped_file_region() [3/4]

llvm::sys::fs::mapped_file_region::mapped_file_region ( const mapped_file_region &  )

delete

mapped_file_region() [4/4]

llvm::sys::fs::mapped_file_region::mapped_file_region	(	sys::fs::file_t	fd,
		mapmode	mode,
		size_t	length,
		uint64_t	offset,
		std::error_code &	ec
	)

Parameters

fd	An open file descriptor to map. Does not take ownership of fd.

~mapped_file_region()

llvm::sys::fs::mapped_file_region::~mapped_file_region ( )

inline

Definition at line 1318 of file FileSystem.h.

Member Function Documentation

alignment()

static int llvm::sys::fs::mapped_file_region::alignment ( )

static

Returns

The minimum alignment offset must be.

const_data()

const char * llvm::sys::fs::mapped_file_region::const_data

(

)

const

Get a const view of the data.

Modifying this memory has undefined behavior.

Definition at line 1169 of file Path.cpp.

References assert().

data()

char * llvm::sys::fs::mapped_file_region::data

(

)

const

Definition at line 1164 of file Path.cpp.

References assert().

Referenced by llvm::xray::loadProfile(), llvm::xray::loadTraceFile(), and loadYAML().

dontNeed()

void llvm::sys::fs::mapped_file_region::dontNeed ( )

inline

Definition at line 1328 of file FileSystem.h.

operator bool()

llvm::sys::fs::mapped_file_region::operator bool ( ) const

inlineexplicit

Check if this is a valid mapping.

Definition at line 1321 of file FileSystem.h.

operator=() [1/2]

mapped_file_region & llvm::sys::fs::mapped_file_region::operator= ( const mapped_file_region &  )

delete

operator=() [2/2]

mapped_file_region & llvm::sys::fs::mapped_file_region::operator= ( mapped_file_region &&  Moved )

inline

Definition at line 1305 of file FileSystem.h.

References unmap().

size()

size_t llvm::sys::fs::mapped_file_region::size

(

)

const

Definition at line 1159 of file Path.cpp.

References assert().

Referenced by llvm::xray::loadProfile(), llvm::xray::loadTraceFile(), and loadYAML().

unmap()

void llvm::sys::fs::mapped_file_region::unmap ( )

inline

Unmap.

Definition at line 1324 of file FileSystem.h.

References mapped_file_region().

Referenced by operator=().

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

• include/llvm/Support/FileSystem.h
• lib/Support/Path.cpp