--- /dev/null
+/* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef SIMIX_IO_PRIVATE_HPP
+#define SIMIX_IO_PRIVATE_HPP
+
+#include <xbt/base.h>
+
+#include "simgrid/simix.h"
+#include "popping_private.hpp"
+
+XBT_PRIVATE smx_activity_t SIMIX_file_read(surf_file_t fd, sg_size_t size);
+XBT_PRIVATE smx_activity_t SIMIX_file_write(surf_file_t fd, sg_size_t size);
+
+XBT_PRIVATE void SIMIX_io_destroy(smx_activity_t synchro);
+XBT_PRIVATE void SIMIX_io_finish(smx_activity_t synchro);
+
+#endif