src/libsystemd-terminal/idev.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 /*
  23  * IDev
  24  */
  25
  26 #pragma once
  27
  28 #include <inttypes.h>
  29 #include <stdbool.h>
  30 #include <stdlib.h>
  31 #include <systemd/sd-bus.h>
  32 #include <systemd/sd-event.h>
  33 #include "util.h"
  34
  35 typedef struct idev_data                idev_data;
  36
  37 typedef struct idev_event               idev_event;
  38 typedef struct idev_device              idev_device;
  39 typedef struct idev_session             idev_session;
  40 typedef struct idev_context             idev_context;
  41
  42 /*
  43  * Types
  44  */
  45
  46 enum {
  47         IDEV_ELEMENT_CNT
  48 };
  49
  50 enum {
  51         IDEV_DEVICE_CNT
  52 };
  53
  54 /*
  55  * Data Packets
  56  */
  57
  58 enum {
  59         IDEV_DATA_RESYNC,
  60         IDEV_DATA_CNT
  61 };
  62
  63 struct idev_data {
  64         unsigned int type;
  65         bool resync : 1;
  66 };
  67
  68 /*
  69  * Events
  70  */
  71
  72 enum {
  73         IDEV_EVENT_DEVICE_ADD,
  74         IDEV_EVENT_DEVICE_REMOVE,
  75         IDEV_EVENT_DEVICE_DATA,
  76         IDEV_EVENT_CNT
  77 };
  78
  79 struct idev_event {
  80         unsigned int type;
  81         union {
  82                 struct {
  83                         idev_device *device;
  84                 } device_add, device_remove;
  85
  86                 struct {
  87                         idev_device *device;
  88                         idev_data data;
  89                 } device_data;
  90         };
  91 };
  92
  93 typedef int (*idev_event_fn) (idev_session *s, void *userdata, idev_event *ev);
  94
  95 /*
  96  * Devices
  97  */
  98
  99 void idev_device_enable(idev_device *d);
 100 void idev_device_disable(idev_device *d);
 101
 102 /*
 103  * Sessions
 104  */
 105
 106 enum {
 107         IDEV_SESSION_CUSTOM                     = (1 << 0),
 108         IDEV_SESSION_MANAGED                    = (1 << 1),
 109 };
 110
 111 int idev_session_new(idev_session **out,
 112                      idev_context *c,
 113                      unsigned int flags,
 114                      const char *name,
 115                      idev_event_fn event_fn,
 116                      void *userdata);
 117 idev_session *idev_session_free(idev_session *s);
 118
 119 DEFINE_TRIVIAL_CLEANUP_FUNC(idev_session*, idev_session_free);
 120
 121 bool idev_session_is_enabled(idev_session *s);
 122 void idev_session_enable(idev_session *s);
 123 void idev_session_disable(idev_session *s);
 124
 125 /*
 126  * Contexts
 127  */
 128
 129 int idev_context_new(idev_context **out, sd_event *event, sd_bus *sysbus);
 130 idev_context *idev_context_ref(idev_context *c);
 131 idev_context *idev_context_unref(idev_context *c);
 132
 133 DEFINE_TRIVIAL_CLEANUP_FUNC(idev_context*, idev_context_unref);