<HTML><HEAD> <META http-equiv=Content-Type content='text/html; charset=utf-8'> <title>Samsung Enterprise Portal mySingle</title> <style> P, td, li {font-family:Arial, arial; font-size:9pt; margin-top:5px;margin-bottom:5px;} body{font-family:Arial, arial; font-size:9pt;}</style> </HEAD><BODY>Hi, Actully as u know that when data traverse through DBUS it goes according to the data types(g_value) define on the bus. We also tried to pass one structure using DBUS directly in the past but stuck due to the same problem actully in case of structure there are multiple g_value,but we felt it has to be possible using   GValueArray but it also takes same data type only we stopped it trying but i feel it is possible if we first before sending do some conversion from struct ---> g_value. Regards, Deepesh    ------- Original Message ------- Sender : ravikumar.paluri<ravikumar.paluri@azingo.com> Date : Jul 03, 2009 19:12 (GMT+09:00) Title : Passing structure from Server to Client on DBus Hi all,    I would like to fill and send a structure from Server to Client on DBus. The structure I want to send from server app is: struct download_info  {    char *URL;    char *file_name;    long int content_length;    char *mime_type;    char *encoding;  }; The inrospection XML file contents are as below: <?xml version ="1.0" encoding ="UTF-8"?> <node>   <interface name="org.azingo.dlmgr">   <method name="download_getdownloadinfo">      <annotation name="org.freedesktop.DBus.GLib.CSymbol" value="download_daemon_getdownloadinfo"/>      <arg type="i" name="download_handle" direction="in"/>      <arg type="(ssxss)" name="dl_info" direction="out"/>      <arg type="i" name="error" direction="out">             <annotation name="org.freedesktop.DBus.GLib.ReturnVal" value="error"/>      </arg>   </method>   </interface> </node> The client side binding I generated for this is as below: gboolean org_azingo_dlmgr_download_getdownloadinfo (DBusGProxy *proxy, const gint IN_download_handle, GValueArray** OUT_dl_info, gint* OUT_error, GError **error) {   return dbus_g_proxy_call (proxy, "download_getdownloadinfo", error, G_TYPE_INT, IN_download_handle, G_TYPE_INVALID, dbus_g_type_get_struct ("GValueArray", G_TYPE_STRING, G_TYPE_STRING, G_TYPE_INT64, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_INVALID), OUT_dl_info, G_TYPE_INT, OUT_error, G_TYPE_INVALID); } For this I allocated memory on the client side as shown below:  GValueArray *gvalue_dl_info_client = NULL;  gvalue_dl_info_client = g_value_array_new(6); and called  org_azingo_dlmgr_download_getdownloadinfo (remoteDldaemon, 20, &gvalue_dl_info_client, &error, &gerror); On the server side, I did the following: gint download_daemon_getdownloadinfo(DownloadDaemon* DaemonObject,                                      DOWNLOAD_HANDLE download_handle,                                      GValueArray **gvalue_dl_info,                                      GError** error) {   DownloadManager* download_object = (DownloadManager*)download_handle;        dl_info = (download_info *)g_malloc0(sizeof(download_info));     dl_info->URL = "www.google.com";     dl_info->file_name = "azingo";     dl_info->content_length = 12344;     dl_info->mime_type = "image/jpg";     dl_info->encoding = "utf-8";       g_value_array_append (*gvalue_dl_info, NULL);  g_value_set_string (g_value_array_get_nth(*gvalue_dl_info, 0), dl_info->URL);  g_value_array_append (*gvalue_dl_info, NULL);  g_value_set_string (g_value_array_get_nth(*gvalue_dl_info, 1), dl_info->file_name);   g_value_array_append (*gvalue_dl_info, NULL);   g_value_set_long (g_value_array_get_nth(*gvalue_dl_info, 2), dl_info->content_length);   g_value_array_append (*gvalue_dl_info, NULL);   g_value_set_string (g_value_array_get_nth(*gvalue_dl_info, 3), dl_info->mime_type);   g_value_array_append (*gvalue_dl_info, NULL);   g_value_set_string (g_value_array_get_nth(*gvalue_dl_info, 4), dl_info->encoding); }   so, Ideally, *gvalue_dl_info should point to a valid memory since I have allocated memory for it in the client app but I'm getting the following assertion: (process:22619): GLib-GObject-CRITICAL **: g_value_array_append: assertion `value_array != NULL' failed (process:22619): GLib-GObject-CRITICAL **: g_value_array_get_nth: assertion `value_array != NULL' failed   Which in turn means that (*gvalue_dl_info == NULL) The client and Server are two different processes.  So, is it possible to send the address of memory allocated in Client app to Server app on DBus? If not, is there any other way to send a structure from Server to Client? Any pointers would be appreciated. Thanks, Ravi. _______________________________________________ dbus mailing list dbus@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dbus     </BODY></HTML>