[tracker/extractor-dbus-fd] libtracker-common: Add async send_and_splice

[Adrien Bustany <abustany src gnome org>]

commit 55a804c7d2fa2ff492e1852e88157bb4e9d45b6c
Author: Adrien Bustany <abustany gnome org>
Date:   Fri Jul 2 14:47:38 2010 +0200

    libtracker-common: Add async send_and_splice

 src/libtracker-common/tracker-dbus.c |  139 +++++++++++++++++++++++++++++++++-
 src/libtracker-common/tracker-dbus.h |   12 +++
 2 files changed, 150 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-common/tracker-dbus.c b/src/libtracker-common/tracker-dbus.c
index 8915cc8..042dc23 100644
--- a/src/libtracker-common/tracker-dbus.c
+++ b/src/libtracker-common/tracker-dbus.c
@@ -49,6 +49,15 @@ typedef struct {
 	GTimeVal last_time;
 } ClientData;
 
+typedef struct {
+	GInputStream *unix_input_stream;
+	GInputStream *buffered_input_stream;
+	GOutputStream *output_stream;
+	DBusPendingCall *call;
+	TrackerSendAndSpliceCallback callback;
+	gpointer user_data;
+} SendAndSpliceData;
+
 static GSList *hooks;
 static gboolean block_hooks;
 
@@ -749,7 +758,7 @@ tracker_dbus_send_and_splice (DBusConnection  *connection,
 	                        buffered_input_stream,
 	                        G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE |
 	                        G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
-	                        NULL,
+	                        cancellable,
 	                        &inner_error);
 
 	if (G_LIKELY (!inner_error)) {
@@ -795,3 +804,131 @@ tracker_dbus_send_and_splice (DBusConnection  *connection,
 
 	return ret_value;
 }
+
+static SendAndSpliceData*
+send_and_splice_data_new (GInputStream                 *unix_input_stream,
+                          GInputStream                 *buffered_input_stream,
+                          GOutputStream                *output_stream,
+						  DBusPendingCall              *call,
+						  TrackerSendAndSpliceCallback  callback,
+						  gpointer                      user_data)
+{
+	SendAndSpliceData *data;
+
+	data = g_slice_new0 (SendAndSpliceData);
+	data->unix_input_stream = unix_input_stream;
+	data->buffered_input_stream = buffered_input_stream;
+	data->output_stream = output_stream;
+	data->call = call;
+	data->callback = callback;
+	data->user_data = user_data;
+
+	return data;
+}
+
+static void
+send_and_splice_data_free (SendAndSpliceData *data)
+{
+	g_object_unref (data->unix_input_stream);
+	g_object_unref (data->buffered_input_stream);
+	g_object_unref (data->output_stream);
+	dbus_pending_call_unref (data->call);
+}
+
+static void
+send_and_splice_async_callback (GObject      *source,
+                                GAsyncResult *result,
+                                gpointer      user_data)
+{
+	SendAndSpliceData *data = user_data;
+	DBusMessage *reply = NULL;
+	GError *error = NULL;
+
+	g_output_stream_splice_finish (data->output_stream,
+	                               result,
+	                               &error);
+
+	if (G_LIKELY (!error)) {
+		dbus_pending_call_block (data->call);
+		reply = dbus_pending_call_steal_reply (data->call);
+
+		if (G_UNLIKELY (dbus_message_get_type (reply) == DBUS_MESSAGE_TYPE_ERROR)) {
+			DBusError dbus_error;
+
+			dbus_error_init (&dbus_error);
+			dbus_set_error_from_message (&dbus_error, reply);
+			dbus_set_g_error (&error, &dbus_error);
+			dbus_error_free (&dbus_error);
+
+			(* data->callback) (NULL, -1, error, data->user_data);
+
+			g_error_free (error);
+		} else {
+			(* data->callback) (g_memory_output_stream_get_data (G_MEMORY_OUTPUT_STREAM (data->output_stream)),
+			                    g_memory_output_stream_get_data_size (G_MEMORY_OUTPUT_STREAM (data->output_stream)),
+			                    NULL,
+			                    data->user_data);
+		}
+	} else {
+		(* data->callback) (NULL, -1, error, data->user_data);
+
+		g_error_free (error);
+	}
+
+	if (reply) {
+		dbus_message_unref (reply);
+	}
+
+	send_and_splice_data_free (data);
+}
+
+void
+tracker_dbus_send_and_splice_async (DBusConnection               *connection,
+                                    DBusMessage                  *message,
+                                    int                           fd,
+                                    GCancellable                 *cancellable,
+                                    TrackerSendAndSpliceCallback  callback,
+                                    gpointer                      user_data)
+{
+	DBusPendingCall *call;
+	GInputStream *unix_input_stream;
+	GInputStream *buffered_input_stream;
+	GOutputStream *output_stream;
+	SendAndSpliceData *data;
+
+	g_return_if_fail (connection);
+	g_return_if_fail (message);
+
+
+	dbus_connection_send_with_reply (connection,
+	                                 message,
+	                                 &call,
+	                                 -1);
+	dbus_message_unref (message);
+
+	if (!call) {
+		g_critical ("FD passing unsupported or connection disconnected");
+		return;
+	}
+
+	unix_input_stream = g_unix_input_stream_new (fd, TRUE);
+	buffered_input_stream = g_buffered_input_stream_new_sized (unix_input_stream,
+	                                                           TRACKER_DBUS_PIPE_BUFFER_SIZE);
+	output_stream = g_memory_output_stream_new (NULL, 0, g_realloc, NULL);
+
+	data = send_and_splice_data_new (unix_input_stream,
+	                                 buffered_input_stream,
+	                                 output_stream,
+	                                 call,
+	                                 callback,
+	                                 user_data);
+
+	g_output_stream_splice_async (output_stream,
+	                              buffered_input_stream,
+	                              G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE |
+	                              G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
+	                              0,
+	                              cancellable,
+	                              send_and_splice_async_callback,
+	                              data);
+}
diff --git a/src/libtracker-common/tracker-dbus.h b/src/libtracker-common/tracker-dbus.h
index 4b66e21..68128c4 100644
--- a/src/libtracker-common/tracker-dbus.h
+++ b/src/libtracker-common/tracker-dbus.h
@@ -92,6 +92,11 @@ typedef struct TrackerDBusRequestHandler TrackerDBusRequestHandler;
 typedef void (*TrackerDBusRequestFunc) (guint    request_id,
                                         gpointer user_data);
 
+typedef void (*TrackerSendAndSpliceCallback) (void     *buffer,
+                                              gssize    buffer_size,
+                                              GError   *error,
+                                              gpointer  user_data);
+
 typedef struct {
 	guint    id;
 	gpointer data1;
@@ -169,6 +174,13 @@ gboolean         tracker_dbus_send_and_splice        (DBusConnection
                                                       gssize                     *dest_buffer_size,
                                                       GError                    **error);
 
+void             tracker_dbus_send_and_splice_async  (DBusConnection               *connection,
+                                                      DBusMessage                  *message,
+                                                      int                           fd,
+                                                      GCancellable                 *cancellable,
+                                                      TrackerSendAndSpliceCallback  callback,
+                                                      gpointer                      user_data);
+
 G_END_DECLS
 
 #endif /* __LIBTRACKER_COMMON_DBUS_H__ */