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-rw-r--r--json-glib/json-value.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/json-glib/json-value.c b/json-glib/json-value.c
index b6d47e1..148cf8d 100644
--- a/json-glib/json-value.c
+++ b/json-glib/json-value.c
@@ -2,6 +2,7 @@
*
* This file is part of JSON-GLib
* Copyright (C) 2012 Emmanuele Bassi <ebassi@gnome.org>
+ * Copyright (C) 2015 Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -18,6 +19,7 @@
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
+ * Philip Withnall <philip.withnall@collabora.co.uk>
*/
#include "config.h"
@@ -165,12 +167,32 @@ json_value_free (JsonValue *value)
}
}
+/**
+ * json_value_seal:
+ * @value: a #JsonValue
+ *
+ * Seals the #JsonValue, making it immutable to further changes.
+ *
+ * If the @value is already immutable, this is a no-op.
+ *
+ * Since: UNRELEASED
+ */
+void
+json_value_seal (JsonValue *value)
+{
+ g_return_if_fail (JSON_VALUE_IS_VALID (value));
+ g_return_if_fail (value->ref_count > 0);
+
+ value->immutable = TRUE;
+}
+
#define _JSON_VALUE_DEFINE_SET(Type,EType,CType,VField) \
void \
json_value_set_##Type (JsonValue *value, CType VField) \
{ \
g_return_if_fail (JSON_VALUE_IS_VALID (value)); \
g_return_if_fail (JSON_VALUE_HOLDS (value, JSON_VALUE_##EType)); \
+ g_return_if_fail (!value->immutable); \
\
value->data.VField = VField; \
\
@@ -202,6 +224,7 @@ json_value_set_string (JsonValue *value,
{
g_return_if_fail (JSON_VALUE_IS_VALID (value));
g_return_if_fail (JSON_VALUE_HOLDS_STRING (value));
+ g_return_if_fail (!value->immutable);
g_free (value->data.v_str);
value->data.v_str = g_strdup (v_str);