Avoid null pointer dereference.

[simgrid.git] / src / bindings / lua / lua_host.cpp

diff --git a/src/bindings/lua/lua_host.cpp b/src/bindings/lua/lua_host.cpp
index 02b5583..7adcf77 100644 (file)
--- a/src/bindings/lua/lua_host.cpp
+++ b/src/bindings/lua/lua_host.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010-2018. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2010-2019. 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. */
@@ -11,13 +11,14 @@
 
 XBT_LOG_NEW_DEFAULT_CATEGORY(lua_host, "Lua Host module");
 
-#define HOST_MODULE_NAME "simgrid.host"
-#define HOST_FIELDNAME   "__simgrid_host"
+constexpr char HOST_MODULE_NAME[] = "simgrid.host";
+constexpr char HOST_FIELDNAME[]   = "__simgrid_host";
+
 /* ********************************************************************************* */
 /*                                simgrid.host API                                   */
 /* ********************************************************************************* */
 
-/** @brief Ensures that the pointed stack value is an host userdatum and returns it.
+/** @brief Ensures that the pointed stack value is a host userdatum and returns it.
  *
  * @param L a Lua state
  * @param index an index in the Lua stack
@@ -29,8 +30,7 @@ sg_host_t sglua_check_host(lua_State * L, int index)
   lua_getfield(L, index, HOST_FIELDNAME);
   sg_host_t *pi = (sg_host_t *) luaL_checkudata(L, lua_gettop(L), HOST_MODULE_NAME);
   lua_pop(L, 1);
-  if (pi == nullptr)
-    XBT_ERROR("luaL_checkudata() returned nullptr");
+  xbt_assert(pi != nullptr, "luaL_checkudata() returned nullptr");
   sg_host_t ht = *pi;
   if (not ht)
     luaL_error(L, "null Host");
@@ -143,8 +143,8 @@ static int l_host_get_property_value(lua_State * L)
  */
 static int l_host_destroy(lua_State *L)
 {
-  //sg_host_t ht = sglua_check_host(L, 1);
-  //FIXME: not working..__MSG_host_priv_free(MSG_host_priv(ht));
+  sg_host_t ht = sglua_check_host(L, 1);
+  ht->destroy();
   return 0;
 }