[gnome-online-accounts] Revert "Revert "goaidentity: Fix deadlock in goaalarm on_cancelled""

[Ray Strode <halfline src gnome org>]

commit be4cd635c23db285de665e7a86b66302f3d27f99
Author: Ray Strode <rstrode redhat com>
Date:   Mon Sep 23 16:19:21 2013 -0400

    Revert "Revert "goaidentity: Fix deadlock in goaalarm on_cancelled""
    
    This reverts commit 53d660a4bb7841a2da5c7a94d23f96485105b926.

 src/goaidentity/goaalarm.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)
---
diff --git a/src/goaidentity/goaalarm.c b/src/goaidentity/goaalarm.c
index 79e2a12..ae749f7 100644
--- a/src/goaidentity/goaalarm.c
+++ b/src/goaidentity/goaalarm.c
@@ -256,12 +256,31 @@ goa_alarm_init (GoaAlarm *self)
   g_rec_mutex_init (&self->priv->lock);
 }
 
+static gboolean
+async_alarm_cancel_idle_cb (gpointer user_data)
+{
+  GoaAlarm *self = user_data;
+
+  clear_scheduled_wakeups (self);
+  return G_SOURCE_REMOVE;
+}
+
 static void
 on_cancelled (GCancellable *cancellable, gpointer user_data)
 {
   GoaAlarm *self = GOA_ALARM (user_data);
+  GMainContext *main_context;
+  GSource *idle_source;
 
-  clear_scheduled_wakeups (self);
+  main_context = g_main_context_ref_thread_default ();
+
+  idle_source = g_idle_source_new ();
+  g_source_set_priority (idle_source, G_PRIORITY_HIGH_IDLE);
+  g_source_set_callback (idle_source, async_alarm_cancel_idle_cb, g_object_ref (self), g_object_unref);
+  g_source_attach (idle_source, main_context);
+  g_source_unref (idle_source);
+
+  g_main_context_unref (main_context);
 }
 
 static void