Removed thrash checking code here since thrashing shouldn't happen now

2001-08-01  Christopher James Lahey  <clahey@ximian.com>

	* backend/ebook/e-book-view-listener.c
	(e_book_view_listener_check_queue): Removed thrash checking code
	here since thrashing shouldn't happen now that we've cleaned this
	up some.

	* backend/ebook/e-book.c (e_book_do_response_get_view): Properly
	handle cases where construction fails.

svn path=/trunk/; revision=11539

2 files changed, 78 insertions, 83 deletions

diff --git a/addressbook/backend/ebook/e-book-view-listener.c b/addressbook/backend/ebook/e-book-view-listener.c
index 705cc155c8..7e0f6d5c29 100644
--- a/addressbook/backend/ebook/e-book-view-listener.c
+++ b/addressbook/backend/ebook/e-book-view-listener.c
@@ -32,48 +32,27 @@ struct _EBookViewListenerPrivate {
 	guint stopped : 1;
 };
 
+/* Only release our listener reference when the idle is finished. */
 static gboolean
 e_book_view_listener_check_queue (EBookViewListener *listener)
 {
-	static gint thrash = 0;
-	gint queue_len;
-
 	if (listener->priv->stopped) {
 		listener->priv->idle_id = 0;
-		return TRUE;
+		bonobo_object_unref (BONOBO_OBJECT (listener));
+		return FALSE;
 	}
 
-	queue_len = g_list_length (listener->priv->response_queue);
-
-	bonobo_object_ref (BONOBO_OBJECT (listener));
 	if (listener->priv->response_queue != NULL) {
 		gtk_signal_emit (GTK_OBJECT (listener),
 				 e_book_view_listener_signals [RESPONSES_QUEUED]);
 	}
 
-	/* This means we didn't make any progress in dealing with what is on our
-	   response queue. */
-	if (queue_len == g_list_length (listener->priv->response_queue))
-		++thrash;
-	else
-		thrash = 0;
-
-	if (thrash > 20 || listener->priv->response_queue == NULL) {
-
-		if (thrash > 20) {
-			g_error ("e_book_view_listener_check_queue thrashing!");
-			thrash = 0;
-		}
-		
+	if (listener->priv->response_queue == NULL) {
 		listener->priv->idle_id = 0;
-
-		/* Only release our listener reference when the idle is finished. */
 		bonobo_object_unref (BONOBO_OBJECT (listener));
-
 		return FALSE;
 	}
 
-
 	return TRUE;
 }
 
diff --git a/addressbook/backend/ebook/e-book.c b/addressbook/backend/ebook/e-book.c
index 73b39b6c46..9c8111b714 100644
--- a/addressbook/backend/ebook/e-book.c
+++ b/addressbook/backend/ebook/e-book.c
@@ -206,28 +206,32 @@ e_book_do_response_get_cursor (EBook                 *book,
 
 	cursor = e_card_cursor_new(resp->cursor);
 
-	if (op->cb) {
-		if (op->active)
-			((EBookCursorCallback) op->cb) (book, resp->status, cursor, op->closure);
-		else
-			((EBookCursorCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
-	}
+	if (cursor != NULL) {
+		if (op->cb) {
+			if (op->active)
+				((EBookCursorCallback) op->cb) (book, resp->status, cursor, op->closure);
+			else
+				((EBookCursorCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+		}
 
-	/*
-	 * Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
-	 */
-	CORBA_exception_init (&ev);
+		/*
+		 * Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
+		 */
+		CORBA_exception_init (&ev);
 
-	bonobo_object_release_unref (resp->cursor, &ev);
+		bonobo_object_release_unref (resp->cursor, &ev);
 
-	if (ev._major != CORBA_NO_EXCEPTION) {
-		g_warning ("e_book_do_response_get_cursor: Exception releasing "
-			   "remote GNOME_Evolution_Addressbook_CardCursor interface!\n");
-	}
+		if (ev._major != CORBA_NO_EXCEPTION) {
+			g_warning ("e_book_do_response_get_cursor: Exception releasing "
+				   "remote GNOME_Evolution_Addressbook_CardCursor interface!\n");
+		}
 
-	CORBA_exception_free (&ev);
+		CORBA_exception_free (&ev);
 
-	gtk_object_unref(GTK_OBJECT(cursor));
+		gtk_object_unref(GTK_OBJECT(cursor));
+	} else {
+		((EBookCursorCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+	}
 	
 	g_free (op);
 }
@@ -251,35 +255,41 @@ e_book_do_response_get_view (EBook                 *book,
 	}
 	
 	book_view = e_book_view_new(resp->book_view, op->listener);
-	e_book_view_set_book (book_view, book);
 
-	/* Only execute the callback if the operation is still flagged as active (i.e. hasn't
-	   been cancelled.  This is mildly wasteful since we unnecessaryily create the
-	   book_view, etc... but I'm leery of tinkering with the CORBA magic. */
-	if (op->cb) {
-		if (op->active)
-			((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
-		else
-			((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
-	}
+	if (book_view != NULL) {
+		e_book_view_set_book (book_view, book);
+
+		/* Only execute the callback if the operation is still flagged as active (i.e. hasn't
+		   been cancelled.  This is mildly wasteful since we unnecessaryily create the
+		   book_view, etc... but I'm leery of tinkering with the CORBA magic. */
+		if (op->cb) {
+			if (op->active)
+				((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
+			else
+				((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+		}
 	
-	/*
-	 * Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
-	 */
-	CORBA_exception_init (&ev);
+		/*
+		 * Release the remote GNOME_Evolution_Addressbook_Book in the PAS.
+		 */
+		CORBA_exception_init (&ev);
 
-	bonobo_object_release_unref  (resp->book_view, &ev);
+		bonobo_object_release_unref  (resp->book_view, &ev);
 
-	if (ev._major != CORBA_NO_EXCEPTION) {
-		g_warning ("e_book_do_response_get_view: Exception releasing "
-			   "remote GNOME_Evolution_Addressbook_BookView interface!\n");
-	}
+		if (ev._major != CORBA_NO_EXCEPTION) {
+			g_warning ("e_book_do_response_get_view: Exception releasing "
+				   "remote GNOME_Evolution_Addressbook_BookView interface!\n");
+		}
 
-	CORBA_exception_free (&ev);
+		CORBA_exception_free (&ev);
+
+		gtk_object_unref(GTK_OBJECT(book_view));
+	} else {
+		e_book_view_listener_stop (op->listener);
+		((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+	}
 
-	gtk_object_unref(GTK_OBJECT(book_view));
 	bonobo_object_unref(BONOBO_OBJECT(op->listener));
-	
 	g_free (op);
 }
 
@@ -300,32 +310,38 @@ e_book_do_response_get_changes (EBook                 *book,
 	}
 
 	book_view = e_book_view_new (resp->book_view, op->listener);
-	e_book_view_set_book (book_view, book);
+
+	if (book_view != NULL) {
+		e_book_view_set_book (book_view, book);
 	
-	if (op->cb) {
-		if (op->active)
-			((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
-		else
-			((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
-	}
+		if (op->cb) {
+			if (op->active)
+				((EBookBookViewCallback) op->cb) (book, resp->status, book_view, op->closure);
+			else
+				((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+		}
 
-	/*
-	 * Release the remote GNOME_Evolution_Addressbook_BookView in the PAS.
-	 */
-	CORBA_exception_init (&ev);
+		/*
+		 * Release the remote GNOME_Evolution_Addressbook_BookView in the PAS.
+		 */
+		CORBA_exception_init (&ev);
 
-	bonobo_object_release_unref  (resp->book_view, &ev);
+		bonobo_object_release_unref  (resp->book_view, &ev);
 
-	if (ev._major != CORBA_NO_EXCEPTION) {
-		g_warning ("e_book_do_response_get_changes: Exception releasing "
-			   "remote GNOME_Evolution_Addressbook_BookView interface!\n");
-	}
+		if (ev._major != CORBA_NO_EXCEPTION) {
+			g_warning ("e_book_do_response_get_changes: Exception releasing "
+				   "remote GNOME_Evolution_Addressbook_BookView interface!\n");
+		}
 
-	CORBA_exception_free (&ev);
+		CORBA_exception_free (&ev);
+
+		gtk_object_unref(GTK_OBJECT(book_view));
+	} else {
+		e_book_view_listener_stop (op->listener);
+		((EBookBookViewCallback) op->cb) (book, E_BOOK_STATUS_CANCELLED, NULL, op->closure);
+	}
 
-	gtk_object_unref(GTK_OBJECT(book_view));
 	bonobo_object_unref(BONOBO_OBJECT(op->listener));
-	
 	g_free (op);
 }