[brasero] Add an additional reference to GDrive or GVolume when doing an operation on them in case the GDrive

[Philippe Rouquier <philippr src gnome org>]

commit 1064a5dbd7a4e741047a450fdc93ff96163e2a15
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Sat Oct 17 20:31:23 2009 +0200

    Add an additional reference to GDrive or GVolume when doing an operation on them in case the GDrive or the GVolume object gets updated while waiting in the main loop

 libbrasero-media/brasero-gio-operation.c |   24 ++++++++++++++++++++++--
 1 files changed, 22 insertions(+), 2 deletions(-)
---
diff --git a/libbrasero-media/brasero-gio-operation.c b/libbrasero-media/brasero-gio-operation.c
index 1ec1bef..6fc3cf3 100644
--- a/libbrasero-media/brasero-gio-operation.c
+++ b/libbrasero-media/brasero-gio-operation.c
@@ -243,6 +243,8 @@ brasero_gio_operation_umount (GVolume *gvolume,
 						     G_CALLBACK (brasero_gio_operation_umounted_cb),
 						     op);
 
+		/* NOTE: we own a reference to mount
+		 * object so no need to ref it even more */
 		g_mount_unmount (mount,
 				 G_MOUNT_UNMOUNT_NONE,
 				 cancel,
@@ -325,8 +327,12 @@ brasero_gio_operation_mount (GVolume *gvolume,
 		BraseroGioOperation *op;
 
 		op = g_new0 (BraseroGioOperation, 1);
-		op->cancel = cancel;
+		op->cancel = cancel;
 
+		/* Ref gvolume as it could be unreffed 
+		 * while we are in the loop */
+		g_object_ref (gvolume);
+
 		g_volume_mount (gvolume,
 				G_MOUNT_MOUNT_NONE,
 				operation,				/* authentification */
@@ -334,6 +340,8 @@ brasero_gio_operation_mount (GVolume *gvolume,
 				brasero_gio_operation_mount_finish,
 				op);
 		result = brasero_gio_operation_wait_for_operation_end (op, error);
+
+		g_object_unref (gvolume);
 	}
 	else {
 		g_volume_mount (gvolume,
@@ -408,6 +416,10 @@ brasero_gio_operation_eject_volume (GVolume *gvolume,
 					      G_CALLBACK (brasero_gio_operation_removed_cb),
 					      op);
 
+		/* Ref gvolume as it could be unreffed 
+		 * while we are in the loop */
+		g_object_ref (gvolume);
+
 		g_volume_eject (gvolume,
 				G_MOUNT_UNMOUNT_NONE,
 				cancel,
@@ -418,6 +430,8 @@ brasero_gio_operation_eject_volume (GVolume *gvolume,
 		g_signal_handler_disconnect (gvolume, eject_sig);
 
 		brasero_gio_operation_destroy (op);
+
+		g_object_unref (gvolume);
 	}
 	else {
 		g_volume_eject (gvolume,
@@ -491,10 +505,16 @@ brasero_gio_operation_eject_drive (GDrive *gdrive,
 			       brasero_gio_operation_eject_finish,
 			       op);
 
+		/* Ref gdrive as it could be unreffed 
+		 * while we are in the loop */
+		g_object_ref (gdrive);
+
 		result = brasero_gio_operation_wait_for_operation_end (op, error);
 		brasero_gio_operation_destroy (op);
 		g_signal_handler_disconnect (gdrive, eject_sig);
-		g_signal_handler_disconnect (gdrive, disconnect_sig);
+		g_signal_handler_disconnect (gdrive, disconnect_sig);
+
+		g_object_unref (gdrive);
 	}
 	else {
 		g_drive_eject (gdrive,