src/task.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <glib.h>
  27
  28 #include "connman.h"
  29
  30 struct connman_task {
  31         char *path;
  32         pid_t pid;
  33 };
  34
  35 static GHashTable *task_hash = NULL;
  36
  37 static volatile gint task_counter;
  38
  39 static void free_task(gpointer data)
  40 {
  41         struct connman_task *task = data;
  42
  43         DBG("task %p", task);
  44
  45         g_free(task->path);
  46         g_free(task);
  47 }
  48
  49 struct connman_task *connman_task_create(void)
  50 {
  51         struct connman_task *task;
  52         gint counter;
  53
  54         DBG("");
  55
  56         task = g_try_new0(struct connman_task, 1);
  57         if (task == NULL)
  58                 return NULL;
  59
  60         counter = g_atomic_int_exchange_and_add(&task_counter, 1);
  61
  62         task->path = g_strdup_printf("/task/%d", counter);
  63         task->pid = -1;
  64
  65         DBG("task %p", task);
  66
  67         g_hash_table_insert(task_hash, task->path, task);
  68
  69         return task;
  70 }
  71
  72 void connman_task_destroy(struct connman_task *task)
  73 {
  74         DBG("task %p", task);
  75
  76         g_hash_table_remove(task_hash, task->path);
  77 }
  78
  79 static DBusHandlerResult task_filter(DBusConnection *connection,
  80                                         DBusMessage *message, void *user_data)
  81 {
  82         struct connman_task *task;
  83         const char *path;
  84
  85         if (dbus_message_get_type(message) != DBUS_MESSAGE_TYPE_METHOD_CALL)
  86                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  87
  88         if (dbus_message_has_interface(message,
  89                                         CONNMAN_TASK_INTERFACE) == FALSE)
  90                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  91
  92         path = dbus_message_get_path(message);
  93         if (path == NULL)
  94                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  95
  96         task = g_hash_table_lookup(task_hash, path);
  97         if (task == NULL)
  98                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  99
 100         return DBUS_HANDLER_RESULT_HANDLED;
 101 }
 102
 103 static const char *task_rule = "type=method_call"
 104                                         ",interface=" CONNMAN_TASK_INTERFACE;
 105
 106 static DBusConnection *connection;
 107
 108 int __connman_task_init(void)
 109 {
 110         DBG("");
 111
 112         connection = connman_dbus_get_connection();
 113
 114         dbus_connection_add_filter(connection, task_filter, NULL, NULL);
 115
 116         g_atomic_int_set(&task_counter, 0);
 117
 118         task_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 119                                                         NULL, free_task);
 120
 121         dbus_bus_add_match(connection, task_rule, NULL);
 122         dbus_connection_flush(connection);
 123
 124         return 0;
 125 }
 126
 127 void __connman_task_cleanup(void)
 128 {
 129         DBG("");
 130
 131         dbus_bus_remove_match(connection, task_rule, NULL);
 132         dbus_connection_flush(connection);
 133
 134         g_hash_table_destroy(task_hash);
 135         task_hash = NULL;
 136
 137         dbus_connection_remove_filter(connection, task_filter, NULL);
 138
 139         dbus_connection_unref(connection);
 140 }