From 6c4ee55f27b8ed507a96b1e3236b735e926778d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Fri, 18 Aug 2017 15:38:51 +0300
Subject: [PATCH] Implement SetValueOptional for GstRc<T>

---
 gstreamer/src/miniobject.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gstreamer/src/miniobject.rs b/gstreamer/src/miniobject.rs
index df4ca89c6..cb9b94f9c 100644
--- a/gstreamer/src/miniobject.rs
+++ b/gstreamer/src/miniobject.rs
@@ -434,6 +434,16 @@ impl<T: MiniObject + glib::StaticType> glib::value::SetValue for GstRc<T> {
     }
 }
 
+impl<T: MiniObject + glib::StaticType> glib::value::SetValueOptional for GstRc<T> {
+    unsafe fn set_value_optional(v: &mut glib::Value, s: Option<&Self>) {
+        if let Some(s) = s {
+            gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, s.as_ptr() as gpointer);
+        } else {
+            gobject_ffi::g_value_set_boxed(v.to_glib_none_mut().0, ptr::null_mut());
+        }
+    }
+}
+
 impl<T: MiniObject + 'static> GlibPtrDefault for GstRc<T> {
     type GlibType = *mut T::GstType;
 }