gui/dbus_helpers.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2008, 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains D-Bus helpers
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include <stdbool.h>
  28 #include <dbus/dbus.h>
  29 #include <dbus/dbus-glib.h>
  30 #include <dbus/dbus-glib-lowlevel.h>
  31
  32 #include "dbus_helpers.h"
  33 #include "../dbus/helpers.h"
  34
  35 void
  36 patchage_dbus_init()
  37 {
  38   dbus_error_init(&g_dbus_error);
  39
  40   // Connect to the bus
  41   g_dbus_connection = dbus_bus_get(DBUS_BUS_SESSION, &g_dbus_error);
  42   if (dbus_error_is_set(&g_dbus_error))
  43   {
  44     //error_msg("dbus_bus_get() failed");
  45     //error_msg(g_dbus_error.message);
  46     dbus_error_free(&g_dbus_error);
  47   }
  48
  49   dbus_connection_setup_with_g_main(g_dbus_connection, NULL);
  50 }
  51
  52 bool
  53 patchage_dbus_call_valist(
  54   bool response_expected,
  55   const char * service,
  56   const char * object,
  57   const char * iface,
  58   const char * method,
  59   DBusMessage ** reply_ptr_ptr,
  60   int in_type,
  61   va_list ap)
  62 {
  63   DBusMessage * request_ptr;
  64   DBusMessage * reply_ptr;
  65
  66   request_ptr = dbus_message_new_method_call(
  67     service,
  68     object,
  69     iface,
  70     method);
  71   if (!request_ptr)
  72   {
  73     //throw std::runtime_error("dbus_message_new_method_call() returned 0");
  74   }
  75
  76   dbus_message_append_args_valist(request_ptr, in_type, ap);
  77
  78   // send message and get a handle for a reply
  79   reply_ptr = dbus_connection_send_with_reply_and_block(
  80     g_dbus_connection,
  81     request_ptr,
  82     DBUS_CALL_DEFAULT_TIMEOUT,
  83     &g_dbus_error);
  84
  85   dbus_message_unref(request_ptr);
  86
  87   if (!reply_ptr)
  88   {
  89     if (response_expected)
  90     {
  91       //error_msg("no reply from server when calling method '%s', error is '%s'", method, _error.message);
  92     }
  93     dbus_error_free(&g_dbus_error);
  94   }
  95   else
  96   {
  97     *reply_ptr_ptr = reply_ptr;
  98   }
  99
 100   return reply_ptr;
 101 }
 102
 103 bool
 104 patchage_dbus_call(
 105   bool response_expected,
 106   const char * service,
 107   const char * object,
 108   const char * iface,
 109   const char * method,
 110   DBusMessage ** reply_ptr_ptr,
 111   int in_type,
 112   ...)
 113 {
 114   bool ret;
 115   va_list ap;
 116
 117   va_start(ap, in_type);
 118
 119   ret = patchage_dbus_call_valist(
 120     response_expected,
 121     service,
 122     object,
 123     iface,
 124     method,
 125     reply_ptr_ptr,
 126     in_type,
 127     ap);
 128
 129   va_end(ap);
 130
 131   return (ap != NULL);
 132 }
 133
 134 void
 135 patchage_dbus_add_match(
 136   const char * rule)
 137 {
 138   dbus_bus_add_match(g_dbus_connection, rule, NULL);
 139 }
 140
 141 void
 142 patchage_dbus_add_filter(
 143   DBusHandleMessageFunction function,
 144   void * user_data)
 145 {
 146   dbus_connection_add_filter(g_dbus_connection, function, user_data, NULL);
 147 }
 148
 149 void
 150 patchage_dbus_uninit()
 151 {
 152   if (g_dbus_connection)
 153   {
 154     dbus_connection_flush(g_dbus_connection);
 155   }
 156
 157   if (dbus_error_is_set(&g_dbus_error))
 158   {
 159     dbus_error_free(&g_dbus_error);
 160   }
 161 }