Add support for g_autoptr() to our types

g_autoptr() is a macro that was defined in GLib 2.44 that allows for
basic auto-cleanup of variables. One way to add this kind of support
would be through the use of e.g. `G_DECLARE_DERIVABLE_TYPE()` for our
declarations, but this would consitute an ABI break (due to the
`...Private *` field in the public structs). Instead, we can use
`G_DEFINE_AUTOPTR_CLEANUP_FUNC` to manually declare this.

This commit also bumps the minimally required GLib version to 2.44

configure.ac

@@ -9,9 +9,9 @@ dnl Dependency versions
 
 # Required
 
-GLIB_REQ=2.38.0
+GLIB_REQ=2.44.0
-GLIB_MIN=GLIB_VERSION_2_38
+GLIB_MIN=GLIB_VERSION_2_44
-GLIB_MAX=GLIB_VERSION_2_38
+GLIB_MAX=GLIB_VERSION_2_44
 
 # Optional
 

libsecret/secret-collection.h

@@ -173,6 +173,8 @@ guint64             secret_collection_get_created              (SecretCollection
 
 guint64             secret_collection_get_modified             (SecretCollection *self);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretCollection, g_object_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_COLLECTION_H___ */

libsecret/secret-item.h

@@ -191,6 +191,8 @@ guint64             secret_item_get_created                (SecretItem *self);
 
 guint64             secret_item_get_modified               (SecretItem *self);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretItem, g_object_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_ITEM_H___ */

libsecret/secret-private.h

@@ -56,6 +56,8 @@ SecretSync *         _secret_sync_new                         (void);
 
 void                 _secret_sync_free                        (gpointer data);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretSync, _secret_sync_free)
+
 void                 _secret_sync_on_result                   (GObject *source,
                                                                GAsyncResult *result,
                                                                gpointer user_data);
@@ -185,6 +187,8 @@ gchar *              _secret_value_unref_to_string            (SecretValue *valu
 
 void                 _secret_session_free                     (gpointer data);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretSession, _secret_session_free)
+
 const gchar *        _secret_session_get_algorithms           (SecretSession *session);
 
 const gchar *        _secret_session_get_path                 (SecretSession *session);

libsecret/secret-prompt.h

@@ -75,6 +75,8 @@ GVariant *          secret_prompt_perform_finish            (SecretPrompt *self,
                                                              GAsyncResult *result,
                                                              GError **error);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretPrompt, g_object_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_PROMPT_H___ */

libsecret/secret-schema.h

@@ -72,6 +72,8 @@ void              secret_schema_unref              (SecretSchema *schema);
 
 GType             secret_schema_attribute_get_type (void) G_GNUC_CONST;
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretSchema, g_object_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_SCHEMA_H___ */

libsecret/secret-service.h

@@ -304,6 +304,8 @@ gboolean             secret_service_set_alias_sync                (SecretService
                                                                    GCancellable *cancellable,
                                                                    GError **error);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretService, g_object_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_SERVICE_H___ */

libsecret/secret-value.h

@@ -51,6 +51,8 @@ SecretValue *       secret_value_ref               (SecretValue *value);
 
 void                secret_value_unref             (gpointer value);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SecretValue, secret_value_unref);
+
 G_END_DECLS
 
 #endif /* __SECRET_VALUE_H___ */