[gtksourceview/wip/destructor] Use a DSO destructor to unref singletons

[Sébastien Wilmet <swilmet src gnome org>]

commit 8e9ae577298e5eac9f68767dbc2f5652d77b7ac7
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Aug 2 07:54:59 2016 +0200

    Use a DSO destructor to unref singletons

 gtksourceview/gtksourcestyleschememanager.c |   20 +++++++++++++-------
 gtksourceview/gtksourcestyleschememanager.h |    4 ++++
 2 files changed, 17 insertions(+), 7 deletions(-)
---
diff --git a/gtksourceview/gtksourcestyleschememanager.c b/gtksourceview/gtksourcestyleschememanager.c
index 161536e..eeae1fd 100644
--- a/gtksourceview/gtksourcestyleschememanager.c
+++ b/gtksourceview/gtksourcestyleschememanager.c
@@ -57,6 +57,8 @@ enum {
        PROP_SCHEME_IDS
 };
 
+static GtkSourceStyleSchemeManager *default_instance;
+
 G_DEFINE_TYPE_WITH_PRIVATE (GtkSourceStyleSchemeManager, gtk_source_style_scheme_manager, G_TYPE_OBJECT)
 
 static void
@@ -202,16 +204,20 @@ gtk_source_style_scheme_manager_new (void)
 GtkSourceStyleSchemeManager *
 gtk_source_style_scheme_manager_get_default (void)
 {
-       static GtkSourceStyleSchemeManager *instance;
-
-       if (instance == NULL)
+       if (default_instance == NULL)
        {
-               instance = gtk_source_style_scheme_manager_new ();
-               g_object_add_weak_pointer (G_OBJECT (instance),
-                                          (gpointer) &instance);
+               default_instance = gtk_source_style_scheme_manager_new ();
+               g_object_add_weak_pointer (G_OBJECT (default_instance),
+                                          (gpointer) &default_instance);
        }
 
-       return instance;
+       return default_instance;
+}
+
+GtkSourceStyleSchemeManager *
+_gtk_source_style_scheme_manager_peek_default (void)
+{
+       return default_instance;
 }
 
 static gboolean
diff --git a/gtksourceview/gtksourcestyleschememanager.h b/gtksourceview/gtksourcestyleschememanager.h
index ed35d0a..9c3a56a 100644
--- a/gtksourceview/gtksourcestyleschememanager.h
+++ b/gtksourceview/gtksourcestyleschememanager.h
@@ -74,6 +74,10 @@ GTK_SOURCE_AVAILABLE_IN_ALL
 GtkSourceStyleSchemeManager *
                         gtk_source_style_scheme_manager_get_default            (void);
 
+G_GNUC_INTERNAL
+GtkSourceStyleSchemeManager *
+                        _gtk_source_style_scheme_manager_peek_default          (void);
+
 GTK_SOURCE_AVAILABLE_IN_ALL
 void                    gtk_source_style_scheme_manager_set_search_path        (GtkSourceStyleSchemeManager  
  *manager,
                                                                                 gchar                        
 **path);