src/libsystemd/sd-bus/bus-slot.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Lennart Poettering
   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 #include "sd-bus.h"
  23 #include "bus-control.h"
  24 #include "bus-objects.h"
  25 #include "bus-slot.h"
  26
  27 sd_bus_slot *bus_slot_allocate(
  28                 sd_bus *bus,
  29                 bool floating,
  30                 BusSlotType type,
  31                 size_t extra,
  32                 void *userdata) {
  33
  34         sd_bus_slot *slot;
  35
  36         assert(bus);
  37
  38         slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra);
  39         if (!slot)
  40                 return NULL;
  41
  42         slot->n_ref = 1;
  43         slot->type = type;
  44         slot->bus = bus;
  45         slot->floating = floating;
  46         slot->userdata = userdata;
  47
  48         if (!floating)
  49                 sd_bus_ref(bus);
  50
  51         LIST_PREPEND(slots, bus->slots, slot);
  52
  53         return slot;
  54 }
  55
  56 _public_ sd_bus_slot* sd_bus_slot_ref(sd_bus_slot *slot) {
  57         assert_return(slot, NULL);
  58
  59         assert(slot->n_ref > 0);
  60
  61         slot->n_ref++;
  62         return slot;
  63 }
  64
  65 void bus_slot_disconnect(sd_bus_slot *slot) {
  66         sd_bus *bus;
  67
  68         assert(slot);
  69
  70         switch (slot->type) {
  71
  72         case _BUS_SLOT_DISCONNECTED:
  73                 /* Already disconnected... */
  74                 return;
  75
  76         case BUS_REPLY_CALLBACK:
  77
  78                 if (slot->reply_callback.cookie != 0)
  79                         hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie);
  80
  81                 if (slot->reply_callback.timeout != 0)
  82                         prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
  83
  84                 break;
  85
  86         case BUS_FILTER_CALLBACK:
  87                 slot->bus->filter_callbacks_modified = true;
  88                 LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback);
  89                 break;
  90
  91         case BUS_MATCH_CALLBACK:
  92
  93                 if (slot->bus->bus_client)
  94                         bus_remove_match_internal(slot->bus, slot->match_callback.match_string, slot->match_callback.cookie);
  95
  96                 slot->bus->match_callbacks_modified = true;
  97                 bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback);
  98
  99                 free(slot->match_callback.match_string);
 100
 101                 break;
 102
 103         case BUS_NODE_CALLBACK:
 104
 105                 if (slot->node_callback.node) {
 106                         LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback);
 107                         slot->bus->nodes_modified = true;
 108
 109                         bus_node_gc(slot->bus, slot->node_callback.node);
 110                 }
 111
 112                 break;
 113
 114         case BUS_NODE_ENUMERATOR:
 115
 116                 if (slot->node_enumerator.node) {
 117                         LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator);
 118                         slot->bus->nodes_modified = true;
 119
 120                         bus_node_gc(slot->bus, slot->node_enumerator.node);
 121                 }
 122
 123                 break;
 124
 125         case BUS_NODE_OBJECT_MANAGER:
 126
 127                 if (slot->node_object_manager.node) {
 128                         LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager);
 129                         slot->bus->nodes_modified = true;
 130
 131                         bus_node_gc(slot->bus, slot->node_object_manager.node);
 132                 }
 133
 134                 break;
 135
 136         case BUS_NODE_VTABLE:
 137
 138                 if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) {
 139                         const sd_bus_vtable *v;
 140
 141                         for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v++) {
 142                                 struct vtable_member *x = NULL;
 143
 144                                 switch (v->type) {
 145
 146                                 case _SD_BUS_VTABLE_METHOD: {
 147                                         struct vtable_member key;
 148
 149                                         key.path = slot->node_vtable.node->path;
 150                                         key.interface = slot->node_vtable.interface;
 151                                         key.member = v->x.method.member;
 152
 153                                         x = hashmap_remove(slot->bus->vtable_methods, &key);
 154                                         break;
 155                                 }
 156
 157                                 case _SD_BUS_VTABLE_PROPERTY:
 158                                 case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
 159                                         struct vtable_member key;
 160
 161                                         key.path = slot->node_vtable.node->path;
 162                                         key.interface = slot->node_vtable.interface;
 163                                         key.member = v->x.method.member;
 164
 165
 166                                         x = hashmap_remove(slot->bus->vtable_properties, &key);
 167                                         break;
 168                                 }}
 169
 170                                 free(x);
 171                         }
 172                 }
 173
 174                 free(slot->node_vtable.interface);
 175
 176                 if (slot->node_vtable.node) {
 177                         LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable);
 178                         slot->bus->nodes_modified = true;
 179
 180                         bus_node_gc(slot->bus, slot->node_vtable.node);
 181                 }
 182
 183                 break;
 184         }
 185         bus = slot->bus;
 186
 187         slot->type = _BUS_SLOT_DISCONNECTED;
 188         slot->bus = NULL;
 189         LIST_REMOVE(slots, bus->slots, slot);
 190
 191         if (!slot->floating)
 192                 sd_bus_unref(bus);
 193 }
 194
 195 _public_ sd_bus_slot* sd_bus_slot_unref(sd_bus_slot *slot) {
 196
 197         if (!slot)
 198                 return NULL;
 199
 200         assert(slot->n_ref > 0);
 201
 202         if (slot->n_ref > 1) {
 203                 slot->n_ref --;
 204                 return NULL;
 205         }
 206
 207         bus_slot_disconnect(slot);
 208         free(slot);
 209
 210         return NULL;
 211 }
 212
 213 _public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) {
 214         assert_return(slot, NULL);
 215
 216         return slot->bus;
 217 }
 218
 219 _public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) {
 220         assert_return(slot, NULL);
 221
 222         return slot->userdata;
 223 }
 224
 225 _public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) {
 226         void *ret;
 227
 228         assert_return(slot, NULL);
 229
 230         ret = slot->userdata;
 231         slot->userdata = userdata;
 232
 233         return ret;
 234 }
 235
 236 _public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) {
 237         assert_return(slot, NULL);
 238         assert_return(slot->type != _BUS_SLOT_DISCONNECTED, NULL);
 239
 240         if (slot->bus->current_slot != slot)
 241                 return NULL;
 242
 243         return slot->bus->current_message;
 244 }