X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bindings%2Fpython%2Fbt2%2Fbt2%2Fnative_bt_plugin.i;fp=bindings%2Fpython%2Fbt2%2Fbt2%2Fnative_bt_plugin.i;h=435d40f2ed7de5b86243d5e26d18bf6710d72baa;hb=fdfb7f179cc9ab67d33e83e7f59ee99df609a944;hp=640085beea076f433975d96fd8366cfd6acde92c;hpb=9633b20c7ba4f95bac7482262aad7c42d916da37;p=babeltrace.git

diff --git a/bindings/python/bt2/bt2/native_bt_plugin.i b/bindings/python/bt2/bt2/native_bt_plugin.i
index 640085be..435d40f2 100644
--- a/bindings/python/bt2/bt2/native_bt_plugin.i
+++ b/bindings/python/bt2/bt2/native_bt_plugin.i
@@ -96,3 +96,36 @@ extern const bt_plugin *bt_plugin_set_borrow_plugin_by_index_const(
 extern void bt_plugin_set_get_ref(const bt_plugin_set *plugin_set);
 
 extern void bt_plugin_set_put_ref(const bt_plugin_set *plugin_set);
+
+/* Helpers */
+
+bt_property_availability bt_plugin_get_version_wrapper(
+		const bt_plugin *plugin, unsigned int *OUT,
+		unsigned int *OUT, unsigned int *OUT, const char **OUT);
+
+%{
+
+/*
+ * This wrapper ensures that when the API function fails, the `*extra` output
+ * parameter is set to NULL.  This is necessary because the epilogue of the
+ * "char **OUT" typemap will use that value to make a Python str object.  We
+ * can't rely on the initial value of `*extra`, it could point to unreadable
+ * memory.
+ */
+
+bt_property_availability bt_plugin_get_version_wrapper(
+		const bt_plugin *plugin, unsigned int *major,
+		unsigned int *minor, unsigned int *patch, const char **extra)
+{
+	bt_property_availability ret;
+
+	ret = bt_plugin_get_version(plugin, major, minor, patch, extra);
+
+	if (ret == BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE) {
+		*extra = NULL;
+	}
+
+	return ret;
+}
+
+%}