idev-internal.h revision c93e5a62ff599528c3bf2a8656825403aaebe093
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#pragma once
#include <inttypes.h>
#include <libudev.h>
#include <linux/input.h>
#include <stdbool.h>
#include <stdlib.h>
#include <systemd/sd-bus.h>
#include <systemd/sd-event.h>
#include "hashmap.h"
#include "idev.h"
#include "list.h"
#include "util.h"
typedef struct idev_link idev_link;
typedef struct idev_device_vtable idev_device_vtable;
typedef struct idev_element idev_element;
typedef struct idev_element_vtable idev_element_vtable;
/*
* Evdev Elements
*/
bool idev_is_evdev(idev_element *e);
idev_element *idev_find_evdev(idev_session *s, dev_t devnum);
int idev_evdev_new(idev_element **out, idev_session *s, struct udev_device *ud);
/*
* Element Links
*/
struct idev_link {
/* element-to-device connection */
LIST_FIELDS(idev_link, links_by_element);
idev_element *element;
/* device-to-element connection */
LIST_FIELDS(idev_link, links_by_device);
idev_device *device;
};
/*
* Devices
*/
struct idev_device_vtable {
void (*free) (idev_device *d);
void (*attach) (idev_device *d, idev_link *l);
void (*detach) (idev_device *d, idev_link *l);
int (*feed) (idev_device *d, idev_data *data);
};
struct idev_device {
const idev_device_vtable *vtable;
idev_session *session;
char *name;
LIST_HEAD(idev_link, links);
bool public : 1;
bool enabled : 1;
};
#define IDEV_DEVICE_INIT(_vtable, _session) ((idev_device){ \
.vtable = (_vtable), \
.session = (_session), \
})
idev_device *idev_find_device(idev_session *s, const char *name);
int idev_device_add(idev_device *d, const char *name);
idev_device *idev_device_free(idev_device *d);
DEFINE_TRIVIAL_CLEANUP_FUNC(idev_device*, idev_device_free);
int idev_device_feed(idev_device *d, idev_data *data);
void idev_device_feedback(idev_device *d, idev_data *data);
/*
* Elements
*/
struct idev_element_vtable {
void (*free) (idev_element *e);
void (*enable) (idev_element *e);
void (*disable) (idev_element *e);
void (*open) (idev_element *e);
void (*close) (idev_element *e);
void (*feedback) (idev_element *e, idev_data *data);
};
struct idev_element {
const idev_element_vtable *vtable;
idev_session *session;
unsigned long n_open;
char *name;
LIST_HEAD(idev_link, links);
bool enabled : 1;
bool readable : 1;
bool writable : 1;
};
#define IDEV_ELEMENT_INIT(_vtable, _session) ((idev_element){ \
.vtable = (_vtable), \
.session = (_session), \
})
idev_element *idev_find_element(idev_session *s, const char *name);
int idev_element_add(idev_element *e, const char *name);
idev_element *idev_element_free(idev_element *e);
DEFINE_TRIVIAL_CLEANUP_FUNC(idev_element*, idev_element_free);
int idev_element_feed(idev_element *e, idev_data *data);
void idev_element_feedback(idev_element *e, idev_data *data);
/*
* Sessions
*/
struct idev_session {
idev_context *context;
char *name;
char *path;
Hashmap *element_map;
Hashmap *device_map;
idev_event_fn event_fn;
void *userdata;
bool custom : 1;
bool managed : 1;
bool enabled : 1;
};
idev_session *idev_find_session(idev_context *c, const char *name);
int idev_session_raise_device_data(idev_session *s, idev_device *d, idev_data *data);
/*
* Contexts
*/
struct idev_context {
unsigned long ref;
sd_event *event;
sd_bus *sysbus;
Hashmap *session_map;
Hashmap *data_map;
};