#include <provider.h>

Public Attributes
int(*	getattr )(struct statefs_property const *)

statefs_ssize_t(*	size )(struct statefs_property const *)

statefs_handle_t(*	open )(struct statefs_property *self, int flags)

int(*	read )(statefs_handle_t h, char *dst, statefs_size_t len, statefs_off_t off)

int(*	write )(statefs_handle_t, char const *, statefs_size_t, statefs_off_t)

void(*	close )(statefs_handle_t)

bool(*	connect )(struct statefs_property , struct statefs_slot )

void(*	disconnect )(struct statefs_property *)

Detailed Description

API to access properties. The API itself can be accessed concurently but access to separate properties and opened property handles is serialized.

Member Data Documentation

void(* statefs_io::close)(statefs_handle_t)

close I/O handle

bool(* statefs_io::connect)(struct statefs_property *, struct statefs_slot *)

connect discrete property to server slot, provider should invoke statefs_slot.on_changed() when property value is changed

Note: only single connection is opened for single property, so if called several times provider can just replace previous slot value

void(* statefs_io::disconnect)(struct statefs_property *)

disconnect previously connected slot

int(* statefs_io::getattr)(struct statefs_property const *)

get property attributes

Return values

mask	STATEFS_ATTR_DISCRETE \| STATEFS_ATTR_WRITE \| STATEFS_ATTR_READ

statefs_handle_t(* statefs_io::open)(struct statefs_property *self, int flags)

open property for I/O

Parameters

flags [O_RDONLY, O_RDWR, O_WRONLY]

Return values

opaque handle to be used for I/O operations

int(* statefs_io::read)(statefs_handle_t h, char *dst, statefs_size_t len, statefs_off_t off)

read property value (len bytes starting from off)

statefs_ssize_t(* statefs_io::size)(struct statefs_property const *)

get property size. If property length is variable it is better to return maximum property size

int(* statefs_io::write)(statefs_handle_t, char const *, statefs_size_t, statefs_off_t)

write property value (len bytes starting from off)

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