static void OverrideLookupChild(GLib.GType gtype, LookupChildNativeDelegate callback) { unsafe { IntPtr *raw_ptr = (IntPtr *)(((long)gtype.GetClassPtr()) + (long)class_abi.GetFieldOffset("lookup_child")); *raw_ptr = Marshal.GetFunctionPointerForDelegate((Delegate)callback); } }
private bool InternalLookupChild(string prop_name, out Gst.Element element, out IntPtr pspec) { LookupChildNativeDelegate unmanaged = null; unsafe { IntPtr *raw_ptr = (IntPtr *)(((long)this.LookupGType().GetThresholdType().GetClassPtr()) + (long)class_abi.GetFieldOffset("lookup_child")); unmanaged = (LookupChildNativeDelegate)Marshal.GetDelegateForFunctionPointer(*raw_ptr, typeof(LookupChildNativeDelegate)); } if (unmanaged == null) { throw new InvalidOperationException("No base method to invoke"); } IntPtr native_prop_name = GLib.Marshaller.StringToPtrGStrdup(prop_name); IntPtr native_element; bool __result = unmanaged(this.Handle, native_prop_name, out native_element, out pspec); GLib.Marshaller.Free(native_prop_name); element = GLib.Object.GetObject(native_element, true) as Gst.Element; return(__result); }