src/callback.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <errno.h>
  22 #include <vconf.h>
  23 #include <gio/gio.h>
  24
  25 #include "callback.h"
  26 #include "battery.h"
  27 #include "display.h"
  28 #include "common.h"
  29 #include "dbus.h"
  30 #include "list.h"
  31
  32 #define SIGNAL_FLASH_STATE  "ChangeFlashState"
  33
  34 struct device_cb_info {
  35         device_changed_cb cb;
  36         void *data;
  37 };
  38
  39 static dd_list *device_cb_list[DEVICE_CALLBACK_MAX];
  40 static int flash_sigid;
  41
  42 //LCOV_EXCL_START Not called Callback
  43 static void battery_capacity_cb(keynode_t *key, void *data)
  44 {
  45         static device_callback_e type = DEVICE_CALLBACK_BATTERY_CAPACITY;
  46         struct device_cb_info *cb_info;
  47         dd_list *elem, *elem_next;
  48         int val;
  49
  50         val = vconf_keynode_get_int(key);
  51
  52         /* invoke the each callback with value */
  53         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info)
  54                 cb_info->cb(type, (void*)val, cb_info->data);
  55 }
  56 //LCOV_EXCL_STOP
  57
  58 //LCOV_EXCL_START Not called Callback
  59 static void battery_charging_cb(keynode_t *key, void *data)
  60 {
  61         static device_callback_e type = DEVICE_CALLBACK_BATTERY_CHARGING;
  62         struct device_cb_info *cb_info;
  63         dd_list *elem, *elem_next;
  64         int val;
  65
  66         val = vconf_keynode_get_int(key);
  67
  68         /* invoke the each callback with value */
  69         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info)
  70                 cb_info->cb(type, (void*)val, cb_info->data);
  71 }
  72 //LCOV_EXCL_STOP
  73
  74 //LCOV_EXCL_START Not called Callback
  75 static void battery_level_cb(keynode_t *key, void *data)
  76 {
  77         static device_callback_e type = DEVICE_CALLBACK_BATTERY_LEVEL;
  78         struct device_cb_info *cb_info;
  79         dd_list *elem, *elem_next;
  80         int val, status;
  81
  82         val = vconf_keynode_get_int(key);
  83
  84         if (val == VCONFKEY_SYSMAN_BAT_LEVEL_EMPTY)
  85                 status = DEVICE_BATTERY_LEVEL_EMPTY;
  86         else if (val == VCONFKEY_SYSMAN_BAT_LEVEL_CRITICAL)
  87                 status = DEVICE_BATTERY_LEVEL_CRITICAL;
  88         else if (val == VCONFKEY_SYSMAN_BAT_LEVEL_LOW)
  89                 status = DEVICE_BATTERY_LEVEL_LOW;
  90         else if (val == VCONFKEY_SYSMAN_BAT_LEVEL_HIGH)
  91                 status = DEVICE_BATTERY_LEVEL_HIGH;
  92         else if (val == VCONFKEY_SYSMAN_BAT_LEVEL_FULL)
  93                 status = DEVICE_BATTERY_LEVEL_FULL;
  94         else
  95                 status = -1;
  96
  97         /* invoke the each callback with value */
  98         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info)
  99                 cb_info->cb(type, (void*)status, cb_info->data);
 100 }
 101 //LCOV_EXCL_STOP
 102
 103 //LCOV_EXCL_START Not called Callback
 104 static void display_changed_cb(keynode_t *key, void *data)
 105 {
 106         static device_callback_e type = DEVICE_CALLBACK_DISPLAY_STATE;
 107         struct device_cb_info *cb_info;
 108         dd_list *elem, *elem_next;
 109         display_state_e state;
 110         int val;
 111
 112         val = vconf_keynode_get_int(key);
 113
 114         switch (val) {
 115         case 1: state = DISPLAY_STATE_NORMAL;
 116                         break;
 117         case 2: state = DISPLAY_STATE_SCREEN_DIM;
 118                         break;
 119         case 3: state = DISPLAY_STATE_SCREEN_OFF;
 120                         break;
 121         default: state = -1;
 122                         break;
 123         }
 124
 125         /* invoke the each callback with value */
 126         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info)
 127                 cb_info->cb(type, (void*)state, cb_info->data);
 128 }
 129 //LCOV_EXCL_STOP
 130
 131 //LCOV_EXCL_START Not called Callback
 132 static void flash_state_cb(GDBusConnection *conn,
 133                 const gchar *sender,
 134                 const gchar *object,
 135                 const gchar *interface,
 136                 const gchar *signal,
 137                 GVariant *parameters,
 138                 gpointer user_data)
 139 {
 140         static int type = DEVICE_CALLBACK_FLASH_BRIGHTNESS;
 141         struct device_cb_info *cb_info;
 142         dd_list *elem, *elem_next;
 143         int val;
 144
 145         if (strncmp(signal, SIGNAL_FLASH_STATE,
 146                                 sizeof(SIGNAL_FLASH_STATE)) != 0) {
 147                 _E("wrong parameter : signal(%s)", signal);
 148                 return;
 149         }
 150
 151         /* get camera value */
 152         g_variant_get(parameters, "(i)", &val);
 153         _D("%s - %d", signal, val);
 154
 155         /* invoke the each callback with value */
 156         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info)
 157                 cb_info->cb(type, (void*)val, cb_info->data);
 158 }
 159 //LCOV_EXCL_STOP
 160
 161 static int register_signal(const char *bus_name,
 162                 const char *object_path,
 163                 const char *interface_name,
 164                 const char *signal,
 165                 GDBusSignalCallback callback,
 166                 int *sig_id)
 167 {
 168         GError *err = NULL;
 169         GDBusConnection *conn;
 170         int id;
 171
 172 #if !GLIB_CHECK_VERSION(2, 35, 0)
 173         g_type_init();
 174 #endif
 175
 176         conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &err);
 177         if (!conn) {
 178                 _E("fail to get dbus connection : %s", err->message); //LCOV_EXCL_LINE
 179                 g_clear_error(&err); //LCOV_EXCL_LINE System Error
 180                 return -EPERM;
 181         }
 182
 183         /* subscribe signal */
 184         id = g_dbus_connection_signal_subscribe(conn,
 185                         bus_name,
 186                         interface_name,
 187                         signal,         /* null to match on all signals */
 188                         object_path,
 189                         NULL,           /* null to match on all kinds of arguments */
 190                         G_DBUS_SIGNAL_FLAGS_NONE,
 191                         callback,
 192                         NULL,
 193                         NULL);
 194         if (id == 0) {
 195                 _E("fail to connect %s signal", signal); //LCOV_EXCL_LINE
 196                 return -EPERM;
 197         }
 198
 199         if (sig_id)
 200                 *sig_id = id;
 201
 202         return 0;
 203 }
 204
 205 static int unregister_signal(int *sig_id)
 206 {
 207         GError *err = NULL;
 208         GDBusConnection *conn;
 209
 210         if (!sig_id)
 211                 return -EINVAL;
 212
 213         conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &err);
 214         if (!conn) {
 215                 _E("fail to get dbus connection : %s", err->message); //LCOV_EXCL_LINE
 216                 g_clear_error(&err); //LCOV_EXCL_LINE System Error
 217                 return -EPERM;
 218         }
 219
 220         /* unsubscribe signal */
 221         g_dbus_connection_signal_unsubscribe(conn, *sig_id);
 222         *sig_id = 0;
 223
 224         return 0;
 225 }
 226
 227 static int register_request(device_callback_e type)
 228 {
 229         switch (type) {
 230         case DEVICE_CALLBACK_BATTERY_CAPACITY:
 231                 return vconf_notify_key_changed(VCONFKEY_SYSMAN_BATTERY_CAPACITY,
 232                                 battery_capacity_cb, NULL);
 233         case DEVICE_CALLBACK_BATTERY_LEVEL:
 234                 return vconf_notify_key_changed(VCONFKEY_SYSMAN_BATTERY_LEVEL_STATUS,
 235                                 battery_level_cb, NULL);
 236         case DEVICE_CALLBACK_BATTERY_CHARGING:
 237                 return vconf_notify_key_changed(VCONFKEY_SYSMAN_BATTERY_CHARGE_NOW,
 238                                 battery_charging_cb, NULL);
 239         case DEVICE_CALLBACK_DISPLAY_STATE:
 240                 return vconf_notify_key_changed(VCONFKEY_PM_STATE,
 241                                 display_changed_cb, NULL);
 242         case DEVICE_CALLBACK_FLASH_BRIGHTNESS:
 243                 /* sig_id begins with 1. */
 244                 if (flash_sigid)
 245                         return -EEXIST;
 246                 return register_signal(DEVICED_BUS_NAME,
 247                                 DEVICED_PATH_LED,
 248                                 DEVICED_INTERFACE_LED,
 249                                 SIGNAL_FLASH_STATE, flash_state_cb, &flash_sigid);
 250         default:
 251                 break;
 252         }
 253
 254         return -EINVAL;
 255 }
 256
 257 static int release_request(device_callback_e type)
 258 {
 259         switch (type) {
 260         case DEVICE_CALLBACK_BATTERY_CAPACITY:
 261                 return vconf_ignore_key_changed(VCONFKEY_SYSMAN_BATTERY_CAPACITY,
 262                                 battery_capacity_cb);
 263         case DEVICE_CALLBACK_BATTERY_LEVEL:
 264                 return vconf_ignore_key_changed(VCONFKEY_SYSMAN_BATTERY_LEVEL_STATUS,
 265                                 battery_level_cb);
 266         case DEVICE_CALLBACK_BATTERY_CHARGING:
 267                 return vconf_ignore_key_changed(VCONFKEY_SYSMAN_BATTERY_CHARGE_NOW,
 268                                 battery_charging_cb);
 269         case DEVICE_CALLBACK_DISPLAY_STATE:
 270                 return vconf_ignore_key_changed(VCONFKEY_PM_STATE,
 271                                 display_changed_cb);
 272         case DEVICE_CALLBACK_FLASH_BRIGHTNESS:
 273                 if (!flash_sigid)
 274                         return -ENOENT;
 275                 return unregister_signal(&flash_sigid);
 276         default:
 277                 break;
 278         }
 279
 280         return -EINVAL;
 281 }
 282
 283 int device_add_callback(device_callback_e type, device_changed_cb cb, void *data)
 284 {
 285         struct device_cb_info *cb_info;
 286         dd_list *elem, *elem_next;
 287         int ret, n;
 288
 289         if (type < 0 || type >= DEVICE_CALLBACK_MAX)
 290                 return DEVICE_ERROR_INVALID_PARAMETER;
 291
 292         if (!cb)
 293                 return DEVICE_ERROR_INVALID_PARAMETER;
 294
 295         /* check if it is the first request */
 296         n = DD_LIST_LENGTH(device_cb_list[type]);
 297         if (n == 0) {
 298                 ret = register_request(type);
 299                 if (ret < 0)
 300                         return DEVICE_ERROR_OPERATION_FAILED;
 301         }
 302
 303         /* check for the same request */
 304         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info) {
 305                 if (cb_info->cb == cb)
 306                         return DEVICE_ERROR_ALREADY_IN_PROGRESS;
 307         }
 308
 309         /* add device changed callback to list (local) */
 310         cb_info = malloc(sizeof(struct device_cb_info));
 311         if (!cb_info)
 312                 return DEVICE_ERROR_OPERATION_FAILED;
 313
 314         cb_info->cb = cb;
 315         cb_info->data = data;
 316
 317         DD_LIST_APPEND(device_cb_list[type], cb_info);
 318
 319         return DEVICE_ERROR_NONE;
 320 }
 321
 322 int device_remove_callback(device_callback_e type, device_changed_cb cb)
 323 {
 324         struct device_cb_info *cb_info;
 325         dd_list *elem, *elem_next;
 326         int ret, n;
 327
 328         if (type < 0 || type >= DEVICE_CALLBACK_MAX)
 329                 return DEVICE_ERROR_INVALID_PARAMETER;
 330
 331         if (!cb)
 332                 return DEVICE_ERROR_INVALID_PARAMETER;
 333
 334         /* search for the same element with callback */
 335         DD_LIST_FOREACH_SAFE(device_cb_list[type], elem, elem_next, cb_info) {
 336                 if (cb_info->cb == cb)
 337                         break;
 338         }
 339
 340         if (!cb_info)
 341                 return DEVICE_ERROR_INVALID_PARAMETER;
 342
 343         /* remove device callback from list (local) */
 344         DD_LIST_REMOVE(device_cb_list[type], cb_info);
 345         free(cb_info);
 346
 347         /* check if this callback is last element */
 348         n = DD_LIST_LENGTH(device_cb_list[type]);
 349         if (n == 0) {
 350                 ret = release_request(type);
 351                 if (ret < 0)
 352                         return DEVICE_ERROR_OPERATION_FAILED;
 353         }
 354
 355         return DEVICE_ERROR_NONE;
 356 }