X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/58f0f206de294942ec8fa796556362fcc52e7f23..57116d6a1208a89cfbf53a70876ec88ba89243ea:/src/bindings/lua/simgrid_lua.c

diff --git a/src/bindings/lua/simgrid_lua.c b/src/bindings/lua/simgrid_lua.c
index fa6ab955ef..81cda2a68f 100644
--- a/src/bindings/lua/simgrid_lua.c
+++ b/src/bindings/lua/simgrid_lua.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010. The SimGrid Team.
+/* Copyright (c) 2010-2015. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -6,785 +6,110 @@
 
 /* SimGrid Lua bindings                                                     */
 
-#include "simgrid_lua.h"
-#include "lua_state_cloner.h"
+#include "lua_private.h"
 #include "lua_utils.h"
+#include "xbt.h"
+#include "simgrid/msg.h"
+#include "simgrid/simdag.h"
+#include "surf/surfxml_parse.h"
+#include <lauxlib.h>
 
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua, bindings, "Lua Bindings");
-
-#define TASK_MODULE_NAME "simgrid.task"
-#define HOST_MODULE_NAME "simgrid.host"
-// Surf (bypass XML)
-#define LINK_MODULE_NAME "simgrid.link"
-#define ROUTE_MODULE_NAME "simgrid.route"
-#define PLATF_MODULE_NAME "simgrid.platf"
 
-static lua_State* sglua_maestro_state;
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua, bindings, "Lua Bindings");
 
 int luaopen_simgrid(lua_State *L);
-static void register_c_functions(lua_State *L);
-static int run_lua_code(int argc, char **argv);
-
-/* ********************************************************************************* */
-/*                                simgrid.task API                                   */
-/* ********************************************************************************* */
-
-/**
- * \brief Ensures that a value in the stack is a valid task and returns it.
- * \param L a Lua state
- * \param index an index in the Lua stack
- * \return the C task corresponding to this Lua task
- */
-static m_task_t sglua_checktask(lua_State* L, int index)
-{
-  sglua_stack_dump("check task: ", L);
-  luaL_checktype(L, index, LUA_TTABLE);
-                                  /* ... task ... */
-  lua_getfield(L, index, "__simgrid_task");
-                                  /* ... task ... ctask */
-  m_task_t task = *((m_task_t*) luaL_checkudata(L, -1, TASK_MODULE_NAME));
-  lua_pop(L, 1);
-                                  /* ... task ... */
-
-  if (task == NULL) {
-    luaL_error(L, "This task was sent to someone else, you cannot access it anymore");
-  }
-
-  return task;
-}
-
-/**
- * \brief Creates a new task and leaves it onto the stack.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string): name of the task
- * - Argument 2 (number): computation size
- * - Argument 3 (number): communication size
- * - Return value (task): the task created
- *
- * A Lua task is a regular table with a full userdata inside, and both share
- * the same metatable. For the regular table, the metatable allows OO-style
- * writing such as your_task:send(someone).
- * For the userdata, the metatable is used to check its type.
- */
-static int l_task_new(lua_State* L)
-{
-  XBT_DEBUG("Task new");
-  const char* name = luaL_checkstring(L, 1);
-  int comp_size = luaL_checkint(L, 2);
-  int msg_size = luaL_checkint(L, 3);
-                                  /* name comp comm */
-  lua_settop(L, 0);
-                                  /* -- */
-  m_task_t msg_task = MSG_task_create(name, comp_size, msg_size, NULL);
-
-  lua_newtable(L);
-                                  /* task */
-  luaL_getmetatable(L, TASK_MODULE_NAME);
-                                  /* task mt */
-  lua_setmetatable(L, -2);
-                                  /* task */
-  m_task_t* lua_task = (m_task_t*) lua_newuserdata(L, sizeof(m_task_t));
-                                  /* task ctask */
-  *lua_task = msg_task;
-  luaL_getmetatable(L, TASK_MODULE_NAME);
-                                  /* task ctask mt */
-  lua_setmetatable(L, -2);
-                                  /* task ctask */
-  lua_setfield(L, -2, "__simgrid_task");
-                                  /* task */
-  return 1;
-}
-
-/**
- * \brief Returns the name of a task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (task): a task
- * - Return value (string): name of the task
- */
-static int l_task_get_name(lua_State* L)
-{
-  m_task_t task = sglua_checktask(L, 1);
-  lua_pushstring(L, MSG_task_get_name(task));
-  return 1;
-}
-
-/**
- * \brief Returns the computation duration of a task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (task): a task
- * - Return value (number): computation duration of this task
- */
-static int l_task_get_computation_duration(lua_State* L)
-{
-  m_task_t task = sglua_checktask(L, 1);
-  lua_pushnumber(L, MSG_task_get_compute_duration(task));
-  return 1;
-}
-
-/**
- * \brief Executes a task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (task): the task to execute
- * - Return value (nil or error): none if the task was successfully executed, or an error
- * string in case of failure, which may be "task canceled" or "host failure"
- */
-static int l_task_execute(lua_State* L)
-{
-  m_task_t task = sglua_checktask(L, 1);
-  MSG_error_t res = MSG_task_execute(task);
-
-  switch (res) {
-
-    case MSG_OK:
-      return 0;
-
-    case MSG_TASK_CANCELED:
-      lua_pushliteral(L, "task canceled");
-      return 1;
-
-    case MSG_HOST_FAILURE:
-      lua_pushliteral(L, "host failure");
-      return 1;
-
-    default:
-      xbt_die("Unexpected result of MSG_task_execute(): %d, please report this bug", res);
-  }
-}
-
-/**
- * \brief Sends a task to a mailbox and waits for its completion.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (task): the task to send
- * - Argument 2 (string or compatible): mailbox name, as a real string or any
- * type convertible to string (numbers always are)
- * - Return value (nil or error): none if the communication was successful,
- * or an error string in case of failure, which may be "timeout",
- * "host failure" or "transfer failure"
- */
-static int l_task_send(lua_State* L)
-{
-  m_task_t task = sglua_checktask(L, 1);
-  const char* mailbox = luaL_checkstring(L, 2);
-                                  /* task mailbox */
-  lua_settop(L, 1);
-                                  /* task */
-  /* copy my stack into the task, so that the receiver can copy the lua task */
-  MSG_task_set_data(task, L);
-  MSG_error_t res = MSG_task_send(task, mailbox);
-  while (MSG_task_get_data(task) != NULL) {
-    /* don't mess up with my stack: the receiver didn't copy the data yet */
-    MSG_process_sleep(0);
-  }
-
-  switch (res) {
-
-  case MSG_OK:
-    /* the receiver is the owner of the task and may destroy it:
-     * remove the C task on my side so that I don't garbage collect it */
-    lua_getfield(L, 1, "__simgrid_task");
-                                  /* task ctask */
-    m_task_t* udata = (m_task_t*) luaL_checkudata(L, -1, TASK_MODULE_NAME);
-    *udata = NULL;
-    return 0;
-
-  case MSG_TIMEOUT:
-    XBT_DEBUG("MSG_task_send failed: timeout");
-    lua_settop(L, 0);
-    lua_pushliteral(L, "timeout");
-    return 1;
-
-  case MSG_TRANSFER_FAILURE:
-    XBT_DEBUG("MSG_task_send failed: transfer failure");
-    lua_settop(L, 0);
-    lua_pushliteral(L, "transfer failure");
-    return 1;
-
-  case MSG_HOST_FAILURE:
-    XBT_DEBUG("MSG_task_send failed: host failure");
-    lua_settop(L, 0);
-    lua_pushliteral(L, "host failure");
-    return 1;
-
-  default:
-    xbt_die("Unexpected result of MSG_task_send: %d, please report this bug", res);
-  }
-}
-
-/**
- * \brief Receives a task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string or compatible): mailbox name, as a real string or any
- * type convertible to string (numbers always are)
- * - Argument 2 (number, optional): timeout (default is no timeout)
- * - Return value (task or nil+err): the task received, or nil plus an error message if
- * the communication has failed
- */
-static int l_task_recv(lua_State* L)
-{
-  m_task_t task = NULL;
-  const char* mailbox = luaL_checkstring(L, 1);
-  int timeout;
-  if (lua_gettop(L) >= 2) {
-                                  /* mailbox timeout */
-    timeout = luaL_checknumber(L, 2);
-  }
-  else {
-                                  /* mailbox */
-    timeout = -1;
-    /* no timeout by default */
-  }
-  lua_settop(L, 0);
-                                  /* -- */
-  MSG_error_t res = MSG_task_receive_with_timeout(&task, mailbox, timeout);
-
-  switch (res) {
-
-  case MSG_OK:
-    /* copy the data directly from sender's stack */
-  {
-    lua_State* sender_stack = MSG_task_get_data(task);
-    sglua_copy_value(sender_stack, L);
-                                  /* task */
-    MSG_task_set_data(task, NULL);
-    return 1;
-  }
-
-  case MSG_TIMEOUT:
-    XBT_DEBUG("MSG_task_send failed: timeout");
-    lua_pushnil(L);
-    lua_pushliteral(L, "timeout");
-    return 2;
-
-  case MSG_TRANSFER_FAILURE:
-    XBT_DEBUG("MSG_task_send failed: transfer failure");
-    lua_pushnil(L);
-    lua_pushliteral(L, "transfer failure");
-    return 2;
-
-  case MSG_HOST_FAILURE:
-    XBT_DEBUG("MSG_task_send failed: host failure");
-    lua_pushnil(L);
-    lua_pushliteral(L, "host failure");
-    return 2;
-
-  default:
-    xbt_die("Unexpected result of MSG_task_recv: %d, please report this bug", res);
-  }
-}
-
-static const luaL_reg task_functions[] = {
-  {"new", l_task_new},
-  {"get_name", l_task_get_name},
-  {"get_computation_duration", l_task_get_computation_duration},
-  {"execute", l_task_execute},
-  {"send", l_task_send},
-  {"recv", l_task_recv},
-  {NULL, NULL}
-};
-
-/**
- * \brief Finalizes the userdata of a task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (userdata): a C task, possibly NULL if it was sent to another
- * Lua state
- */
-static int l_task_gc(lua_State* L)
-{
-                                  /* ctask */
-  m_task_t task = *((m_task_t*) luaL_checkudata(L, 1, TASK_MODULE_NAME));
-  /* the task is NULL if I sent it to someone else */
-  if (task != NULL) {
-    MSG_task_destroy(task);
-  }
-  return 0;
-}
-
-/**
- * \brief Returns a string representation of a C task.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (userdata): a task
- * - Return value (string): a string describing this task
- */
-static int l_task_tostring(lua_State* L)
-{
-  m_task_t task = *((m_task_t*) luaL_checkudata(L, 1, TASK_MODULE_NAME));
-  lua_pushfstring(L, "Task: %p", task);
-  return 1;
-}
-
-/**
- * \brief Metamethods of both a task table and the userdata inside it.
- */
-static const luaL_reg task_meta[] = {
-  {"__gc", l_task_gc}, /* will be called only for userdata */
-  {"__tostring", l_task_tostring},
-  {NULL, NULL}
-};
+static void sglua_register_c_functions(lua_State *L);
 
 /* ********************************************************************************* */
-/*                                simgrid.host API                                   */
+/*                                  simgrid API                                      */
 /* ********************************************************************************* */
 
 /**
- * \brief Ensures that a value in the stack is a host and returns it.
- * \param L a Lua state
- * \param index an index in the Lua stack
- * \return the C host corresponding to this Lua host
- */
-static m_host_t sglua_checkhost(lua_State * L, int index)
-{
-  m_host_t *pi, ht;
-  luaL_checktype(L, index, LUA_TTABLE);
-  lua_getfield(L, index, "__simgrid_host");
-  pi = (m_host_t *) luaL_checkudata(L, lua_gettop(L), HOST_MODULE_NAME);
-  if (pi == NULL)
-    luaL_typerror(L, index, HOST_MODULE_NAME);
-  ht = *pi;
-  if (!ht)
-    luaL_error(L, "null Host");
-  lua_pop(L, 1);
-  return ht;
-}
-
-/**
- * \brief Returns a host given its name.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string): name of a host
- * - Return value (host): the corresponding host
- */
-static int l_host_get_by_name(lua_State * L)
-{
-  const char *name = luaL_checkstring(L, 1);
-  XBT_DEBUG("Getting Host from name...");
-  m_host_t msg_host = MSG_get_host_by_name(name);
-  if (!msg_host) {
-    luaL_error(L, "null Host : MSG_get_host_by_name failed");
-  }
-  lua_newtable(L);              /* create a table, put the userdata on top of it */
-  m_host_t *lua_host = (m_host_t *) lua_newuserdata(L, sizeof(m_host_t));
-  *lua_host = msg_host;
-  luaL_getmetatable(L, HOST_MODULE_NAME);
-  lua_setmetatable(L, -2);
-  lua_setfield(L, -2, "__simgrid_host");        /* put the userdata as field of the table */
-  /* remove the args from the stack */
-  lua_remove(L, 1);
-  return 1;
-}
-
-/**
- * \brief Returns the name of a host.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (host): a host
- * - Return value (string): name of this host
- */
-static int l_host_get_name(lua_State * L)
-{
-  m_host_t ht = sglua_checkhost(L, 1);
-  lua_pushstring(L, MSG_host_get_name(ht));
-  return 1;
-}
-
-/**
- * \brief Returns the number of existing hosts.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Return value (number): number of hosts
- */
-static int l_host_number(lua_State * L)
-{
-  lua_pushnumber(L, MSG_get_host_number());
-  return 1;
-}
-
-/**
- * \brief Returns the host given its index.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (number): an index (1 is the first)
- * - Return value (host): the host at this index
- */
-static int l_host_at(lua_State * L)
-{
-  int index = luaL_checkinteger(L, 1);
-  m_host_t host = MSG_get_host_table()[index - 1];      // lua indexing start by 1 (lua[1] <=> C[0])
-  lua_newtable(L);              /* create a table, put the userdata on top of it */
-  m_host_t *lua_host = (m_host_t *) lua_newuserdata(L, sizeof(m_host_t));
-  *lua_host = host;
-  luaL_getmetatable(L, HOST_MODULE_NAME);
-  lua_setmetatable(L, -2);
-  lua_setfield(L, -2, "__simgrid_host");        /* put the userdata as field of the table */
-  return 1;
-}
-
-/**
- * \brief Returns the host where the current process is located.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Return value (host): the current host
- */
-static int l_host_self(lua_State * L)
-{
-                                  /* -- */
-  m_host_t host = MSG_host_self();
-  lua_newtable(L);
-                                  /* table */
-  m_host_t* lua_host = (m_host_t*) lua_newuserdata(L, sizeof(m_host_t));
-                                  /* table ud */
-  *lua_host = host;
-  luaL_getmetatable(L, HOST_MODULE_NAME);
-                                  /* table ud mt */
-  lua_setmetatable(L, -2);
-                                  /* table ud */
-  lua_setfield(L, -2, "__simgrid_host");
-                                  /* table */
-  return 1;
-}
-
-/**
- * \brief Returns the value of a host property.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (host): a host
- * - Argument 2 (string): name of the property to get
- * - Return value (string): the value of this property
- */
-static int l_host_get_property_value(lua_State * L)
-{
-  m_host_t ht = sglua_checkhost(L, 1);
-  const char *prop = luaL_checkstring(L, 2);
-  lua_pushstring(L,MSG_host_get_property_value(ht,prop));
-  return 1;
-}
-
-/**
- * \brief Makes the current process sleep for a while.
+ * \brief Prints a log string with debug level.
  * \param L a Lua state
  * \return number of values returned to Lua
  *
- * - Argument 1 (number): duration of the sleep
+ * - Argument 1 (string): the text to print
  */
-static int l_host_sleep(lua_State *L)
-{
-  int time = luaL_checknumber(L, 1);
-  MSG_process_sleep(time);
-  return 0;
-}
+static int debug(lua_State* L) {
 
-/**
- * \brief Destroys a host.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (host): the host to destroy
- */
-static int l_host_destroy(lua_State *L)
-{
-  m_host_t ht = sglua_checkhost(L, 1);
-  __MSG_host_destroy(ht);
+  const char* str = luaL_checkstring(L, 1);
+  XBT_DEBUG("%s", str);
   return 0;
 }
 
-static const luaL_reg host_functions[] = {
-  {"get_by_name", l_host_get_by_name},
-  {"name", l_host_get_name},
-  {"number", l_host_number},
-  {"at", l_host_at},
-  {"self", l_host_self},
-  {"get_prop_value", l_host_get_property_value},
-  {"sleep", l_host_sleep},
-  {"destroy", l_host_destroy},
-  // Bypass XML Methods
-  {"set_function", console_set_function},
-  {"set_property", console_host_set_property},
-  {NULL, NULL}
-};
-
 /**
- * \brief Returns a string representation of a host.
+ * \brief Prints a log string with info level.
  * \param L a Lua state
  * \return number of values returned to Lua
  *
- * - Argument 1 (userdata): a host
- * - Return value (string): a string describing this host
+ * - Argument 1 (string): the text to print
  */
-static int l_host_tostring(lua_State * L)
-{
-  lua_pushfstring(L, "Host :%p", lua_touserdata(L, 1));
-  return 1;
-}
-
-static const luaL_reg host_meta[] = {
-  {"__tostring", l_host_tostring},
-  {0, 0}
-};
-
-/* ********************************************************************************* */
-/*                           lua_stub_generator functions                            */
-/* ********************************************************************************* */
-
-xbt_dict_t process_function_set;
-xbt_dynar_t process_list;
-xbt_dict_t machine_set;
-static s_process_t process;
-
-void s_process_free(void *process)
-{
-  s_process_t *p = (s_process_t *) process;
-  int i;
-  for (i = 0; i < p->argc; i++)
-    free(p->argv[i]);
-  free(p->argv);
-  free(p->host);
-}
-
-static int gras_add_process_function(lua_State * L)
-{
-  const char *arg;
-  const char *process_host = luaL_checkstring(L, 1);
-  const char *process_function = luaL_checkstring(L, 2);
-
-  if (xbt_dict_is_empty(machine_set)
-      || xbt_dict_is_empty(process_function_set)
-      || xbt_dynar_is_empty(process_list)) {
-    process_function_set = xbt_dict_new();
-    process_list = xbt_dynar_new(sizeof(s_process_t), s_process_free);
-    machine_set = xbt_dict_new();
-  }
-
-  xbt_dict_set(machine_set, process_host, NULL, NULL);
-  xbt_dict_set(process_function_set, process_function, NULL, NULL);
-
-  process.argc = 1;
-  process.argv = xbt_new(char *, 1);
-  process.argv[0] = xbt_strdup(process_function);
-  process.host = strdup(process_host);
-
-  lua_pushnil(L);
-  while (lua_next(L, 3) != 0) {
-    arg = lua_tostring(L, -1);
-    process.argc++;
-    process.argv =
-        xbt_realloc(process.argv, (process.argc) * sizeof(char *));
-    process.argv[(process.argc) - 1] = xbt_strdup(arg);
-
-    XBT_DEBUG("index = %f , arg = %s \n", lua_tonumber(L, -2),
-           lua_tostring(L, -1));
-    lua_pop(L, 1);
-  }
-  lua_pop(L, 1);
-  //add to the process list
-  xbt_dynar_push(process_list, &process);
-  return 0;
-}
+static int info(lua_State* L) {
 
-static int gras_generate(lua_State * L)
-{
-  const char *project_name = luaL_checkstring(L, 1);
-  generate_sim(project_name);
-  generate_rl(project_name);
-  generate_makefile_local(project_name);
+  const char* str = luaL_checkstring(L, 1);
+  XBT_INFO("%s", str);
   return 0;
 }
 
-/* ********************************************************************************* */
-/*                               simgrid.platf API                                   */
-/* ********************************************************************************* */
-
-static const luaL_reg platf_functions[] = {
-    {"open", console_open},
-    {"close", console_close},
-    {"AS_open", console_AS_open},
-    {"AS_close", console_AS_close},
-    {"host_new", console_add_host},
-    {"link_new", console_add_link},
-    {"router_new", console_add_router},
-    {"route_new", console_add_route},
-    {NULL, NULL}
-};
-
-/* ********************************************************************************* */
-/*                                  simgrid API                                      */
-/* ********************************************************************************* */
+static int error(lua_State* L) {
 
-/**
- * \brief Deploys your application.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string): name of the deployment file to load
- */
-static int launch_application(lua_State * L)
-{
-  const char *file = luaL_checkstring(L, 1);
-  MSG_function_register_default(run_lua_code);
-  MSG_launch_application(file);
+  const char* str = luaL_checkstring(L, 1);
+  XBT_ERROR("%s", str);
   return 0;
 }
 
-/**
- * \brief Creates the platform.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string): name of the platform file to load
- */
-static int create_environment(lua_State * L)
-{
-  const char *file = luaL_checkstring(L, 1);
-  XBT_DEBUG("Loading environment file %s", file);
-  MSG_create_environment(file);
-  return 0;
-}
+static int critical(lua_State* L) {
 
-/**
- * \brief Prints a log string with debug level.
- * \param L a Lua state
- * \return number of values returned to Lua
- *
- * - Argument 1 (string): the text to print
- */
-static int debug(lua_State * L)
-{
-  const char *str = luaL_checkstring(L, 1);
-  XBT_DEBUG("%s", str);
+  const char* str = luaL_checkstring(L, 1);
+  XBT_CRITICAL("%s", str);
   return 0;
 }
 
 /**
- * \brief Prints a log string with info level.
- * \param L a Lua state
- * \return number of values returned to Lua
+ * @brief Dumps a lua table with XBT_DEBUG
  *
- * - Argument 1 (string): the text to print
+ * This function can be called from within lua via "simgrid.dump(table)". It will
+ * then dump the table via XBT_DEBUG 
  */
-static int info(lua_State * L)
-{
-  const char *str = luaL_checkstring(L, 1);
-  XBT_INFO("%s", str);
-  return 0;
-}
+static int dump(lua_State* L) {
+  int argc = lua_gettop(L);
 
-/**
- * \brief Runs your application.
- * \param L a Lua state
- * \return number of values returned to Lua
- */
-static int run(lua_State * L)
-{
-  MSG_main();
-  return 0;
-}
-
-/**
- * \brief Cleans the simulation.
- * \param L a Lua state
- * \return number of values returned to Lua
- */
-static int simgrid_gc(lua_State * L)
-{
-  MSG_clean();
-  return 0;
-}
+  for (int i = 1; i <= argc; i++) {
+    if (lua_istable(L, i)) {
+      lua_pushnil(L); /* table nil */
 
-/*
- * Register platform for MSG
- */
-static int msg_register_platform(lua_State * L)
-{
-  /* Tell Simgrid we dont wanna use its parser */
-  //surf_parse = console_parse_platform;
-  surf_parse_reset_callbacks();
-  MSG_create_environment(NULL);
-  return 0;
-}
+      //lua_next pops the topmost element from the stack and 
+      //gets the next pair from the table at the specified index
+      while (lua_next(L, i)) { /* table key val  */
+        // we need to copy here, as a cast from "Number" to "String"
+        // could happen in Lua.
+        // see remark in the lua manual, function "lua_tolstring"
+        // http://www.lua.org/manual/5.3/manual.html#lua_tolstring
 
-/*
- * Register platform for Simdag
- */
+        lua_pushvalue(L, -2); /* table key val key */
 
-static int sd_register_platform(lua_State * L)
-{
-  //surf_parse = console_parse_platform_wsL07;
-  surf_parse_reset_callbacks();
-  SD_create_environment(NULL);
-  return 0;
-}
+        const char *key = lua_tostring(L, -1); /* table key val key */
+        const char *val = lua_tostring(L, -2); /* table key val key */
 
-/*
- * Register platform for gras
- */
-static int gras_register_platform(lua_State * L)
-{
-  //surf_parse = console_parse_platform;
-  surf_parse_reset_callbacks();
-  gras_create_environment(NULL);
-  return 0;
-}
+        XBT_DEBUG("%s", sglua_keyvalue_tostring(L, -1, -2));
+      }
 
-/**
- * Register applicaiton for MSG
- */
-static int msg_register_application(lua_State * L)
-{
-  MSG_function_register_default(run_lua_code);
-  //surf_parse = console_parse_application;
-  MSG_launch_application(NULL);
-  return 0;
-}
+      lua_settop(L, argc); // Remove everything except the initial arguments
+    }
+  }
 
-/*
- * Register application for gras
- */
-static int gras_register_application(lua_State * L)
-{
-  gras_function_register_default(run_lua_code);
-  //surf_parse = console_parse_application;
-  gras_launch_application(NULL);
   return 0;
 }
 
 static const luaL_Reg simgrid_functions[] = {
-  {"create_environment", create_environment},
-  {"launch_application", launch_application},
+  {"dump", dump},
   {"debug", debug},
   {"info", info},
-  {"run", run},
+  {"critical", critical},
+  {"error", error},
   /* short names */
-  {"platform", create_environment},
-  {"application", launch_application},
   /* methods to bypass XML parser */
-  {"msg_register_platform", msg_register_platform},
-  {"sd_register_platform", sd_register_platform},
-  {"msg_register_application", msg_register_application},
-  {"gras_register_platform", gras_register_platform},
-  {"gras_register_application", gras_register_application},
-  /* gras sub generator method */
-  {"gras_set_process_function", gras_add_process_function},
-  {"gras_generate", gras_generate},
   {NULL, NULL}
 };
 
@@ -802,225 +127,36 @@ static const luaL_Reg simgrid_functions[] = {
  *
  * \param L the Lua state
  */
+
 int luaopen_simgrid(lua_State *L)
 {
   XBT_DEBUG("luaopen_simgrid *****");
 
-  /* Get the command line arguments from the lua interpreter */
-  char **argv = malloc(sizeof(char *) * LUA_MAX_ARGS_COUNT);
-  int argc = 1;
-  argv[0] = (char *) "/usr/bin/lua";    /* Lie on the argv[0] so that the stack dumping facilities find the right binary. FIXME: what if lua is not in that location? */
-
-  lua_getglobal(L, "arg");
-  /* if arg is a null value, it means we use lua only as a script to init platform
-   * else it should be a table and then take arg in consideration
-   */
-  if (lua_istable(L, -1)) {
-    int done = 0;
-    while (!done) {
-      argc++;
-      lua_pushinteger(L, argc - 2);
-      lua_gettable(L, -2);
-      if (lua_isnil(L, -1)) {
-        done = 1;
-      } else {
-        xbt_assert(lua_isstring(L, -1),
-                    "argv[%d] got from lua is no string", argc - 1);
-        xbt_assert(argc < LUA_MAX_ARGS_COUNT,
-                    "Too many arguments, please increase LUA_MAX_ARGS_COUNT in %s before recompiling SimGrid if you insist on having more than %d args on command line",
-                    __FILE__, LUA_MAX_ARGS_COUNT - 1);
-        argv[argc - 1] = (char *) luaL_checkstring(L, -1);
-        lua_pop(L, 1);
-        XBT_DEBUG("Got command line argument %s from lua", argv[argc - 1]);
-      }
-    }
-    argv[argc--] = NULL;
-
-    /* Initialize the MSG core */
-    MSG_global_init(&argc, argv);
-    XBT_DEBUG("Still %d arguments on command line", argc); // FIXME: update the lua's arg table to reflect the changes from SimGrid
-  }
-
-  /* Keep the context mechanism informed of our lua world today */
-  sglua_maestro_state = L;
-
-  /* initialize access to my tables by children Lua states */
-  lua_newtable(L);
-  lua_setfield(L, LUA_REGISTRYINDEX, "simgrid.maestro_tables");
-
-  register_c_functions(L);
+  sglua_register_c_functions(L);
 
   return 1;
 }
 
-/**
- * \brief Returns whether a Lua state is the maestro state.
- * \param L a Lua state
- * \return true if this is maestro
- */
-int sglua_is_maestro(lua_State* L) {
-  return L == sglua_maestro_state;
-}
-
-/**
- * \brief Returns the maestro state.
- * \return the maestro Lua state
- */
-lua_State* sglua_get_maestro(void) {
-  return sglua_maestro_state;
-}
-
-/**
- * \brief Registers the task functions into the table simgrid.task.
- *
- * Also initialize the metatable of the task userdata type.
- *
- * \param L a lua state
- */
-static void register_task_functions(lua_State* L)
-{
-  /* create a table simgrid.task and fill it with task functions */
-  luaL_openlib(L, TASK_MODULE_NAME, task_functions, 0);
-                                  /* simgrid.task */
-
-  /* create the metatable for tasks, add it to the Lua registry */
-  luaL_newmetatable(L, TASK_MODULE_NAME);
-                                  /* simgrid.task mt */
-  /* fill the metatable */
-  luaL_openlib(L, NULL, task_meta, 0);
-                                  /* simgrid.task mt */
-  lua_pushvalue(L, -2);
-                                  /* simgrid.task mt simgrid.task */
-  /* metatable.__index = simgrid.task
-   * we put the task functions inside the task itself:
-   * this allows to write task:method(args) for
-   * simgrid.task.method(task, args) */
-  lua_setfield(L, -2, "__index");
-                                  /* simgrid.task mt */
-  lua_pop(L, 2);
-                                  /* -- */
-}
-
-/**
- * \brief Registers the host functions into the table simgrid.host.
- *
- * Also initialize the metatable of the host userdata type.
- *
- * \param L a lua state
- */
-static void register_host_functions(lua_State* L)
-{
-  /* create a table simgrid.host and fill it with host functions */
-  luaL_openlib(L, HOST_MODULE_NAME, host_functions, 0);
-                                  /* simgrid.host */
-
-  /* create the metatable for host, add it to the Lua registry */
-  luaL_newmetatable(L, HOST_MODULE_NAME);
-                                  /* simgrid.host mt */
-  /* fill the metatable */
-  luaL_openlib(L, NULL, host_meta, 0);
-                                  /* simgrid.host mt */
-  lua_pushvalue(L, -2);
-                                  /* simgrid.host mt simgrid.host */
-  /* metatable.__index = simgrid.host
-   * we put the host functions inside the host userdata itself:
-   * this allows to write host(args) for
-   * simgrid.host.method(host, args) */
-  // FIXME: cannot work currently, same problem as tasks
-  lua_setfield(L, -2, "__index");
-                                  /* simgrid.host mt */
-  lua_pop(L, 2);
-                                  /* -- */
-}
-
-/**
- * \brief Registers the platform functions into the table simgrid.platf.
- * \param L a lua state
- */
-static void register_platf_functions(lua_State* L)
-{
-  luaL_openlib(L, PLATF_MODULE_NAME, platf_functions, 0);
-                                  /* simgrid.platf */
-  lua_pop(L, 1);
-}
 
 /**
  * \brief Makes the core functions available to the Lua world.
  * \param L a Lua world
  */
-static void register_core_functions(lua_State *L)
+static void sglua_register_core_functions(lua_State *L)
 {
   /* register the core C functions to lua */
-  luaL_register(L, "simgrid", simgrid_functions);
-                                  /* simgrid */
-
-  /* set a finalizer that cleans simgrid, by adding to the simgrid module a
-   * dummy userdata whose __gc metamethod calls MSG_clean() */
-  lua_newuserdata(L, sizeof(void*));
-                                  /* simgrid udata */
-  lua_newtable(L);
-                                  /* simgrid udata mt */
-  lua_pushcfunction(L, simgrid_gc);
-                                  /* simgrid udata mt simgrid_gc */
-  lua_setfield(L, -2, "__gc");
-                                  /* simgrid udata mt */
-  lua_setmetatable(L, -2);
-                                  /* simgrid udata */
-  lua_setfield(L, -2, "__simgrid_loaded");
-                                  /* simgrid */
-  lua_pop(L, 1);
-                                  /* -- */
+  luaL_newlib(L, simgrid_functions); /* simgrid */
+  lua_pushvalue(L, -1);              /* simgrid simgrid */
+  lua_setglobal(L, "simgrid");       /* simgrid */
 }
 
 /**
  * \brief Creates the simgrid module and make it available to Lua.
  * \param L a Lua world
  */
-static void register_c_functions(lua_State *L)
+static void sglua_register_c_functions(lua_State *L)
 {
-  register_core_functions(L);
-  register_task_functions(L);
-  register_host_functions(L);
-  register_platf_functions(L);
-}
-
-/**
- * \brief Runs a Lua function as a new simulated process.
- * \param argc number of arguments of the function
- * \param argv name of the Lua function and array of its arguments
- * \return result of the function
- */
-static int run_lua_code(int argc, char **argv)
-{
-  XBT_DEBUG("Run lua code %s", argv[0]);
-
-  /* create a new state, getting globals from maestro */
-  lua_State *L = sglua_clone_maestro();
-  int res = 1;
-
-  /* start the function */
-  lua_getglobal(L, argv[0]);
-  xbt_assert(lua_isfunction(L, -1),
-              "There is no Lua function with name `%s'", argv[0]);
-
-  /* push arguments onto the stack */
-  int i;
-  for (i = 1; i < argc; i++)
-    lua_pushstring(L, argv[i]);
-
-  /* call the function */
-  _XBT_GNUC_UNUSED int err;
-  err = lua_pcall(L, argc - 1, 1, 0);
-  xbt_assert(err == 0, "Error running function `%s': %s", argv[0],
-              lua_tostring(L, -1));
-
-  /* retrieve result */
-  if (lua_isnumber(L, -1)) {
-    res = lua_tonumber(L, -1);
-    lua_pop(L, 1);              /* pop returned value */
-  }
-
-  XBT_DEBUG("Execution of Lua code %s is over", (argv ? argv[0] : "(null)"));
-
-  return res;
+  sglua_register_core_functions(L);
+  sglua_register_host_functions(L);
+  sglua_register_platf_functions(L);
 }