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authorEmilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>2011-04-20 16:21:49 +0800
committerEmilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>2011-06-09 18:37:55 +0800
commit7a393000d1dd55dc60345f0b2bb51b44215d9607 (patch)
treea43819827b0abfd1e7357a9f28cff4340b067c51 /libempathy/action-chain.c
parent669b6782b2bb1c7275092f5923b8930cc2849c98 (diff)
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Copy TplActionChain from telepathy-logger
Diffstat (limited to 'libempathy/action-chain.c')
-rw-r--r--libempathy/action-chain.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/libempathy/action-chain.c b/libempathy/action-chain.c
new file mode 100644
index 000000000..df792e548
--- /dev/null
+++ b/libempathy/action-chain.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2009 Collabora Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Cosimo Alfarano <cosimo.alfarano@collabora.co.uk>
+ */
+
+#include "config.h"
+#include "action-chain-internal.h"
+
+typedef struct {
+ TplPendingAction action;
+ gpointer user_data;
+} TplActionLink;
+
+
+TplActionChain *
+_tpl_action_chain_new_async (GObject *obj,
+ GAsyncReadyCallback cb,
+ gpointer user_data)
+{
+ TplActionChain *ret = g_slice_new0 (TplActionChain);
+
+ ret->chain = g_queue_new ();
+ ret->simple = g_simple_async_result_new (obj, cb, user_data,
+ _tpl_action_chain_new_async);
+
+ g_object_set_data (G_OBJECT (ret->simple), "chain", ret);
+
+ return ret;
+}
+
+
+static void
+link_free (TplActionLink *l)
+{
+ g_slice_free (TplActionLink, l);
+}
+
+
+void
+_tpl_action_chain_free (TplActionChain *self)
+{
+ g_queue_foreach (self->chain, (GFunc) link_free, NULL);
+ g_queue_free (self->chain);
+ g_object_unref (self->simple);
+ g_slice_free (TplActionChain, self);
+}
+
+
+gpointer // FIXME GObject *
+_tpl_action_chain_get_object (TplActionChain *self)
+{
+ GObject *obj;
+
+ g_return_val_if_fail (self != NULL && self->simple != NULL, NULL);
+
+ obj = g_async_result_get_source_object (G_ASYNC_RESULT (self->simple));
+ g_object_unref (obj); /* don't want the extra ref */
+
+ return obj;
+}
+
+
+void
+_tpl_action_chain_prepend (TplActionChain *self,
+ TplPendingAction func,
+ gpointer user_data)
+{
+ TplActionLink *l;
+
+ l = g_slice_new0 (TplActionLink);
+ l->action = func;
+ l->user_data = user_data;
+
+ g_queue_push_head (self->chain, l);
+}
+
+
+void
+_tpl_action_chain_append (TplActionChain *self,
+ TplPendingAction func,
+ gpointer user_data)
+{
+ TplActionLink *l;
+
+ l = g_slice_new0 (TplActionLink);
+ l->action = func;
+ l->user_data = user_data;
+
+ g_queue_push_tail (self->chain, l);
+}
+
+
+void
+_tpl_action_chain_continue (TplActionChain *self)
+{
+ if (g_queue_is_empty (self->chain))
+ g_simple_async_result_complete (self->simple);
+ else
+ {
+ TplActionLink *l = g_queue_pop_head (self->chain);
+
+ l->action (self, l->user_data);
+ link_free (l);
+ }
+}
+
+
+void
+_tpl_action_chain_terminate (TplActionChain *self,
+ const GError *error)
+{
+ GSimpleAsyncResult *simple = self->simple;
+
+ g_assert (error != NULL);
+
+ g_simple_async_result_set_from_error (simple, error);
+ g_simple_async_result_complete (simple);
+}
+
+
+/**
+ * _tpl_action_chain_new_finish:
+ * @source: the #GObject pass to _tpl_action_chain_new_async()
+ * @result: the #GAsyncResult pass in callback
+ * @error: a pointer to a #GError that will be set on error, or NULL to ignore
+ *
+ * Get the result from running the action chain (%TRUE if the chain completed
+ * successfully, %FALSE with @error set if it was terminated).
+ *
+ * This function also frees the chain.
+ *
+ * Returns: %TRUE on success, %FALSE with @error set on error.
+ */
+gboolean
+_tpl_action_chain_new_finish (GObject *source,
+ GAsyncResult *result,
+ GError **error)
+{
+ TplActionChain *chain;
+
+ g_return_val_if_fail (g_simple_async_result_is_valid (result, source,
+ _tpl_action_chain_new_async), FALSE);
+
+ chain = g_object_get_data (G_OBJECT (result), "chain");
+
+ g_return_val_if_fail (chain != NULL, FALSE);
+
+ if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+ error))
+ return FALSE;
+
+ _tpl_action_chain_free (chain);
+ return TRUE;
+}