mmap

Documentation

Index

• Constants
• func FSize(f *os.File) int
• func Fd(f *os.File) int
• func MMap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error)
• func MSync(b []byte) (err error)
• func MUnmap(b []byte) (err error)
• func Offset(offset int64) int64
• func Open(fd int, offset int64, length int, p Prot) (data []byte, err error)
• func ProtFlags(p Prot) (prot int, flags int)
• type Prot

Constants

const (
	ProtRead  = syscall.PROT_READ
	ProtWrite = syscall.PROT_WRITE
	ProtExec  = syscall.PROT_EXEC

	MapShared  = syscall.MAP_SHARED
	MapPrivate = syscall.MAP_PRIVATE
	MapCopy    = MapPrivate
)

Functions

func FSize

func FSize(f *os.File) int

FSize returns the file size.

func Fd

func Fd(f *os.File) int

Fd returns the integer file descriptor referencing the open file. The file descriptor is valid only until f.Close is called or f is garbage collected.

func MMap

func MMap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error)

MMap calls the MMap system call.

func MSync

func MSync(b []byte) (err error)

MSync calls the msync system call.

func MUnmap

func MUnmap(b []byte) (err error)

MUnmap calls the MUnmap system call.

func Offset

func Offset(offset int64) int64

Offset returns the valid offset.

func Open

func Open(fd int, offset int64, length int, p Prot) (data []byte, err error)

Open opens a MMap

func ProtFlags

func ProtFlags(p Prot) (prot int, flags int)

ProtFlags returns prot and flags by Prot p.

Types

type Prot

type Prot int

Prot is the protection flag.

const (
	// READ represents the read prot
	READ Prot = 1 << iota
	// WRITE represents the write prot
	WRITE
	// COPY represents the copy prot
	COPY
	// EXEC represents the exec prot
	EXEC
)