X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/97a58be52479acc50c2657ae0dea6343785f7c49..2895b2413e1efc17e3a42047c85a4917f1114708:/src/bindings/lua/simgrid_lua.c

diff --git a/src/bindings/lua/simgrid_lua.c b/src/bindings/lua/simgrid_lua.c
index 2002beac00..e919383643 100644
--- a/src/bindings/lua/simgrid_lua.c
+++ b/src/bindings/lua/simgrid_lua.c
@@ -1,194 +1,207 @@
-/* SimGrid Lua bindings                                                     */
-
 /* Copyright (c) 2010. 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. */
+
+/* SimGrid Lua bindings                                                     */
+
 #include "simgrid_lua.h"
+#include "lua_state_cloner.h"
+#include "lua_utils.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua, bindings, "Lua Bindings");
 
-static lua_State *lua_maestro_state;
-
-#define TASK_MODULE_NAME "simgrid.Task"
-#define HOST_MODULE_NAME "simgrid.Host"
+#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 AS_MODULE_NAME "simgrid.AS"
-#define TRACE_MODULE_NAME "simgrid.Trace"
+#define LINK_MODULE_NAME "simgrid.link"
+#define ROUTE_MODULE_NAME "simgrid.route"
+#define PLATF_MODULE_NAME "simgrid.platf"
+
+static lua_State* sglua_maestro_state;
 
-static void stack_dump(const char *msg, lua_State *L);
-static m_task_t check_task(lua_State *L, int index);
+int luaopen_simgrid(lua_State *L);
 static void register_c_functions(lua_State *L);
+static int run_lua_code(int argc, char **argv);
 
-/* ********************************************************************************* */
-/*                            helper functions                                       */
-/* ********************************************************************************* */
 
 /**
- * @brief Dumps the Lua stack
- * @param msg a message to print
- * @param L a Lua state
+ * \brief Like luaL_checkudata, with additional debug logs.
+ *
+ * This function is for debugging purposes only.
+ *
+ * \param L a lua state
+ * \param ud index of the userdata to check in the stack
+ * \param tname key of the metatable of this userdata in the registry
  */
-static void stack_dump(const char *msg, lua_State *L)
-{
-  char buff[2048];
-  char *p = buff;
-  int i;
-  int top = lua_gettop(L);
-
-  fflush(stdout);
-  p += sprintf(p, "STACK(top=%d): ", top);
-
-  for (i = 1; i <= top; i++) {  /* repeat for each level */
-    int t = lua_type(L, i);
-    switch (t) {
-
-    case LUA_TSTRING:          /* strings */
-      p += sprintf(p, "`%s'", lua_tostring(L, i));
-      break;
-
-    case LUA_TBOOLEAN:         /* booleans */
-      p += sprintf(p, lua_toboolean(L, i) ? "true" : "false");
-      break;
-
-    case LUA_TNUMBER:          /* numbers */
-      p += sprintf(p, "%g", lua_tonumber(L, i));
-      break;
-
-    case LUA_TTABLE:
-      p += sprintf(p, "Table");
-      break;
-
-    default:                   /* other values */
-      p += sprintf(p, "???");
-/*      if ((ptr = luaL_checkudata(L,i,TASK_MODULE_NAME))) {
-        p+=sprintf(p,"task");
-      } else {
-        p+=printf(p,"%s", lua_typename(L, t));
-      }*/
-      break;
-
-    }
-    p += sprintf(p, "  ");      /* put a separator */
+static void* my_checkudata(lua_State* L, int ud, const char* tname)
+{
+  XBT_DEBUG("Checking the userdata: ud = %d", ud);
+  sglua_stack_dump("my_checkudata: ", L);
+  void* p = lua_touserdata(L, ud);
+  lua_getfield(L, LUA_REGISTRYINDEX, tname);
+  const void* correct_mt = lua_topointer(L, -1);
+
+  int has_mt = lua_getmetatable(L, ud);
+  XBT_DEBUG("Checking the userdata: has metatable ? %d", has_mt);
+  const void* actual_mt = NULL;
+  if (has_mt) {
+    actual_mt = lua_topointer(L, -1);
+    lua_pop(L, 1);
   }
-  XBT_INFO("%s%s", msg, buff);
+  XBT_DEBUG("Checking the task's metatable: expected %p, found %p", correct_mt, actual_mt);
+  sglua_stack_dump("my_checkudata: ", L);
+
+  if (p == NULL || !lua_getmetatable(L, ud) || !lua_rawequal(L, -1, -2))
+    luaL_typerror(L, ud, tname);
+  lua_pop(L, 2);
+  return p;
 }
 
+/* ********************************************************************************* */
+/*                                simgrid.task API                                   */
+/* ********************************************************************************* */
+
 /**
- * @brief Ensures that a userdata on the stack is a task
- * and returns the pointer inside the userdata.
- * @param L a Lua state
- * @param index an index in the Lua stack
- * @return the task at this index
+ * \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 checkTask(lua_State * L, int index)
+static m_task_t sglua_checktask(lua_State* L, int index)
 {
-  m_task_t *pi, tk;
+  sglua_stack_dump("check task: ", L);
   luaL_checktype(L, index, LUA_TTABLE);
+                                  /* ... task ... */
   lua_getfield(L, index, "__simgrid_task");
-  pi = (m_task_t *) luaL_checkudata(L, -1, TASK_MODULE_NAME);
-  if (pi == NULL)
-    luaL_typerror(L, index, TASK_MODULE_NAME);
-  tk = *pi;
-  if (!tk)
-    luaL_error(L, "null Task");
+                                  /* ... task ... ctask */
+  m_task_t task = *((m_task_t*) luaL_checkudata(L, -1, TASK_MODULE_NAME));
   lua_pop(L, 1);
-  return tk;
-}
+                                  /* ... task ... */
 
-/* ********************************************************************************* */
-/*                           wrapper functions                                       */
-/* ********************************************************************************* */
-
-/**
- * A task is either something to compute somewhere, or something to exchange between two hosts (or both).
- * It is defined by a computing amount and a message size.
- *
- */
+  if (task == NULL) {
+    luaL_error(L, "This task was sent to someone else, you cannot access it anymore");
+  }
 
-/* *              * *
- * * Constructors * *
- * *              * */
+  return task;
+}
 
 /**
- * @brief Constructs a new task with the specified processing amount and amount
- * of data needed.
- *
- * @param name	Task's name
+ * \brief Creates a new task and leaves it onto the stack.
+ * \param L a Lua state
+ * \return number of values returned to Lua
  *
- * @param computeDuration 	A value of the processing amount (in flop) needed to process the task.
- *				If 0, then it cannot be executed with the execute() method.
- *				This value has to be >= 0.
- *
- * @param messageSize		A value of amount of data (in bytes) needed to transfert this task.
- *				If 0, then it cannot be transfered with the get() and put() methods.
- *				This value has to be >= 0.
+ * - Argument 1 (string): name of the task
+ * - Argument 2 (number): computation size
+ * - Argument 3 (number): communication size
+ * - Return value (task): the task created
  */
-static int Task_new(lua_State * L)
+static int l_task_new(lua_State* L)
 {
-  XBT_DEBUG("Task new...");
-  const char *name = luaL_checkstring(L, 1);
+  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);              /* create a table, put the userdata on top of it */
-  m_task_t *lua_task = (m_task_t *) lua_newuserdata(L, sizeof(m_task_t));
+
+  lua_newtable(L);
+                                  /* 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);
-  lua_setfield(L, -2, "__simgrid_task");        /* put the userdata as field of the table */
-  /* remove the args from the stack */
-  lua_remove(L, 1);
-  lua_remove(L, 1);
-  lua_remove(L, 1);
+                                  /* task ctask */
+  lua_setfield(L, -2, "__simgrid_task");
+                                  /* task */
   return 1;
 }
 
-static int Task_get_name(lua_State * L)
-{
-  m_task_t tk = checkTask(L, -1);
-  lua_pushstring(L, MSG_task_get_name(tk));
-  return 1;
-}
-
-static int Task_computation_duration(lua_State * L)
+/**
+ * \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 tk = checkTask(L, -1);
-  lua_pushnumber(L, MSG_task_get_compute_duration(tk));
+  m_task_t task = sglua_checktask(L, 1);
+  lua_pushstring(L, MSG_task_get_name(task));
   return 1;
 }
 
-static int Task_execute(lua_State * L)
+/**
+ * \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_computation_duration(lua_State* L)
 {
-  m_task_t tk = checkTask(L, -1);
-  int res = MSG_task_execute(tk);
-  lua_pushnumber(L, res);
+  m_task_t task = sglua_checktask(L, 1);
+  lua_pushnumber(L, MSG_task_get_compute_duration(task));
   return 1;
 }
 
-static int Task_destroy(lua_State * L)
+/**
+ * \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 (number): error code
+ */
+static int l_task_execute(lua_State* L)
 {
-  m_task_t tk = checkTask(L, -1);
-  int res = MSG_task_destroy(tk);
+  m_task_t task = sglua_checktask(L, 1);
+  int res = MSG_task_execute(task);
   lua_pushnumber(L, res);
   return 1;
 }
 
-static int Task_send(lua_State * L)
-{
-  //stackDump("send ",L);
-  m_task_t tk = checkTask(L, 1);
-  const char *mailbox = luaL_checkstring(L, 2);
-  lua_pop(L, 1);                // remove the string so that the task is on top of it
-  MSG_task_set_data(tk, L);     // Copy my stack into the task, so that the receiver can copy the lua task directly
-  MSG_error_t res = MSG_task_send(tk, mailbox);
-  while (MSG_task_get_data(tk) != NULL) // Don't mess up with my stack: the receiver didn't copy the data yet
-    MSG_process_sleep(0);       // yield
+/**
+ * \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): mailbox
+ */
+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);
+  }
 
-  if (res != MSG_OK)
+  if (res == 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;
+    lua_pop(L, 1);
+                                  /* task */
+  }
+  else {
     switch (res) {
     case MSG_TIMEOUT:
       XBT_DEBUG("MSG_task_send failed : Timeout");
@@ -204,20 +217,44 @@ static int Task_send(lua_State * L)
           ("MSG_task_send failed : Unexpected error , please report this bug");
       break;
     }
+  }
   return 0;
 }
 
-static int Task_recv_with_timeout(lua_State *L)
-{
-  m_task_t tk = NULL;
-  const char *mailbox = luaL_checkstring(L, -2);
-  int timeout = luaL_checknumber(L, -1);
-  MSG_error_t res = MSG_task_receive_with_timeout(&tk, mailbox, timeout);
+/**
+ * \brief Receives a task.
+ * \param L a Lua state
+ * \return number of values returned to Lua
+ *
+ * - Argument 1 (string): mailbox
+ * - Argument 2 (number, optional): timeout (default is no timeout)
+ * - Return value (task/nil): the task received or nil 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);
 
   if (res == MSG_OK) {
-    lua_State *sender_stack = MSG_task_get_data(tk);
-    lua_xmove(sender_stack, L, 1);        // copy the data directly from sender's stack
-    MSG_task_set_data(tk, NULL);
+    /* 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);
   }
   else {
     switch (res) {
@@ -235,57 +272,78 @@ static int Task_recv_with_timeout(lua_State *L)
       break;
     }
     lua_pushnil(L);
+                                  /* nil */
   }
+                                  /* task/nil */
   return 1;
 }
 
-static int Task_recv(lua_State * L)
-{
-  lua_pushnumber(L, -1.0);
-  return Task_recv_with_timeout(L);
-}
-
-static const luaL_reg Task_methods[] = {
-  {"new", Task_new},
-  {"name", Task_get_name},
-  {"computation_duration", Task_computation_duration},
-  {"execute", Task_execute},
-  {"destroy", Task_destroy},
-  {"send", Task_send},
-  {"recv", Task_recv},
-  {"recv_timeout", Task_recv_with_timeout},
+static const luaL_reg task_functions[] = {
+  {"new", l_task_new},
+  {"name", l_task_get_name},
+  {"computation_duration", l_task_computation_duration},
+  {"execute", l_task_execute},
+  {"send", l_task_send},
+  {"recv", l_task_recv},
   {NULL, NULL}
 };
 
-static int Task_gc(lua_State * L)
+/**
+ * \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)
 {
-  m_task_t tk = checkTask(L, -1);
-  if (tk)
-    MSG_task_destroy(tk);
+                                  /* 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;
 }
 
-static int Task_tostring(lua_State * L)
+/**
+ * \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)
 {
-  lua_pushfstring(L, "Task :%p", lua_touserdata(L, 1));
+  m_task_t task = *((m_task_t*) luaL_checkudata(L, 1, TASK_MODULE_NAME));
+  lua_pushfstring(L, "Task: %p", task);
   return 1;
 }
 
-static const luaL_reg Task_meta[] = {
-  {"__gc", Task_gc},
-  {"__tostring", Task_tostring},
+static const luaL_reg task_meta[] = {
+  {"__gc", l_task_gc},
+  {"__tostring", l_task_tostring},
   {NULL, NULL}
 };
 
+/* ********************************************************************************* */
+/*                                simgrid.host API                                   */
+/* ********************************************************************************* */
+
 /**
- * Host
+ * \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 checkHost(lua_State * L, int index)
+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, -1, HOST_MODULE_NAME);
+  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;
@@ -295,7 +353,15 @@ static m_host_t checkHost(lua_State * L, int index)
   return ht;
 }
 
-static int Host_get_by_name(lua_State * L)
+/**
+ * \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...");
@@ -314,20 +380,43 @@ static int Host_get_by_name(lua_State * L)
   return 1;
 }
 
-static int Host_get_name(lua_State * L)
+/**
+ * \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 = checkHost(L, -1);
+  m_host_t ht = sglua_checkhost(L, 1);
   lua_pushstring(L, MSG_host_get_name(ht));
   return 1;
 }
 
-static int Host_number(lua_State * L)
+/**
+ * \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;
 }
 
-static int Host_at(lua_State * L)
+/**
+ * \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])
@@ -338,43 +427,112 @@ static int Host_at(lua_State * L)
   lua_setmetatable(L, -2);
   lua_setfield(L, -2, "__simgrid_host");        /* put the userdata as field of the table */
   return 1;
-
 }
 
-static int Host_self(lua_State * L)
+/**
+ * \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);
-  m_host_t *lua_host =(m_host_t *)lua_newuserdata(L,sizeof(m_host_t));
+                                  /* 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;
 }
 
-static int Host_get_property_value(lua_State * L)
+/**
+ * \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 = checkHost(L, -2);
-  const char *prop = luaL_checkstring(L, -1);
+  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;
 }
 
-static int Host_sleep(lua_State *L)
+/**
+ * \brief Makes the current process sleep for a while.
+ * \param L a Lua state
+ * \return number of values returned to Lua
+ *
+ * - Argument 1 (number): duration of the sleep
+ */
+static int l_host_sleep(lua_State *L)
 {
-  int time = luaL_checknumber(L, -1);
+  int time = luaL_checknumber(L, 1);
   MSG_process_sleep(time);
   return 1;
 }
 
-static int Host_destroy(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 = checkHost(L, -1);
+  m_host_t ht = sglua_checkhost(L, 1);
   __MSG_host_destroy(ht);
   return 1;
 }
 
+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.
+ * \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
+ */
+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                            */
 /* ********************************************************************************* */
@@ -434,7 +592,6 @@ static int gras_add_process_function(lua_State * L)
   return 0;
 }
 
-
 static int gras_generate(lua_State * L)
 {
   const char *project_name = luaL_checkstring(L, 1);
@@ -444,150 +601,33 @@ static int gras_generate(lua_State * L)
   return 0;
 }
 
-/***********************************
- * 	Tracing
- **********************************/
-static int trace_start(lua_State *L)
-{
-#ifdef HAVE_TRACING
-  TRACE_start();
-#endif
-  return 1;
-}
-
-static int trace_category(lua_State * L)
-{
-#ifdef HAVE_TRACING
-  TRACE_category(luaL_checkstring(L, 1));
-#endif
-  return 1;
-}
-
-static int trace_set_task_category(lua_State *L)
-{
-#ifdef HAVE_TRACING
-  TRACE_msg_set_task_category(checkTask(L, -2), luaL_checkstring(L, -1));
-#endif
-  return 1;
-}
-
-static int trace_end(lua_State *L)
-{
-#ifdef HAVE_TRACING
-  TRACE_end();
-#endif
-  return 1;
-}
-
-// *********** Register Methods ******************************************* //
-
-/*
- * Host Methods
- */
-static const luaL_reg Host_methods[] = {
-  {"getByName", Host_get_by_name},
-  {"name", Host_get_name},
-  {"number", Host_number},
-  {"at", Host_at},
-  {"self", Host_self},
-  {"getPropValue", Host_get_property_value},
-  {"sleep", Host_sleep},
-  {"destroy", Host_destroy},
-  // Bypass XML Methods
-  {"setFunction", console_set_function},
-  {"setProperty", console_host_set_property},
-  {NULL, NULL}
-};
-
-static int Host_gc(lua_State * L)
-{
-  m_host_t ht = checkHost(L, -1);
-  if (ht)
-    ht = NULL;
-  return 0;
-}
-
-static int Host_tostring(lua_State * L)
-{
-  lua_pushfstring(L, "Host :%p", lua_touserdata(L, 1));
-  return 1;
-}
-
-static const luaL_reg Host_meta[] = {
-  {"__gc", Host_gc},
-  {"__tostring", Host_tostring},
-  {0, 0}
-};
-
-/*
- * AS Methods
- */
-static const luaL_reg AS_methods[] = {
-  {"new", console_add_AS},
-  {"addHost", console_add_host},
-  {"addLink", console_add_link},
-  {"addRoute", console_add_route},
-  {NULL, NULL}
-};
+/* ********************************************************************************* */
+/*                               simgrid.platf API                                   */
+/* ********************************************************************************* */
 
-/**
- * Tracing Functions
- */
-static const luaL_reg Trace_methods[] = {
-  {"start", trace_start},
-  {"category", trace_category},
-  {"setTaskCategory", trace_set_task_category},
-  {"finish", trace_end},
-  {NULL, NULL}
+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}
 };
 
-/*
- * Environment related
- */
+/* ********************************************************************************* */
+/*                                  simgrid API                                      */
+/* ********************************************************************************* */
 
 /**
- * @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
+ * \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 run_lua_code(int argc, char **argv)
-{
-  XBT_DEBUG("Run lua code %s", argv[0]);
-
-  lua_State *L = lua_newthread(lua_maestro_state);
-  int ref = luaL_ref(lua_maestro_state, LUA_REGISTRYINDEX);     /* protect the thread from being garbage collected */
-  int res = 1;
-
-  /* start the co-routine */
-  lua_getglobal(L, argv[0]);
-  xbt_assert(lua_isfunction(L, -1),
-              "The lua function %s does not seem to exist", argv[0]);
-
-  /* push arguments onto the stack */
-  int i;
-  for (i = 1; i < argc; i++)
-    lua_pushstring(L, argv[i]);
-
-  /* call the function */
-  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 */
-  }
-
-  /* cleanups */
-  luaL_unref(lua_maestro_state, LUA_REGISTRYINDEX, ref);
-  XBT_DEBUG("Execution of Lua code %s is over", (argv ? argv[0] : "(null)"));
-
-  return res;
-}
-
 static int launch_application(lua_State * L)
 {
   const char *file = luaL_checkstring(L, 1);
@@ -596,6 +636,13 @@ static int launch_application(lua_State * L)
   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);
@@ -604,6 +651,13 @@ static int create_environment(lua_State * L)
   return 0;
 }
 
+/**
+ * \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);
@@ -611,6 +665,13 @@ static int debug(lua_State * L)
   return 0;
 }
 
+/**
+ * \brief Prints a log string with info level.
+ * \param L a Lua state
+ * \return number of values returned to Lua
+ *
+ * - Argument 1 (string): the text to print
+ */
 static int info(lua_State * L)
 {
   const char *str = luaL_checkstring(L, 1);
@@ -618,31 +679,36 @@ static int info(lua_State * L)
   return 0;
 }
 
+/**
+ * \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 clean(lua_State * L)
 {
   MSG_clean();
   return 0;
 }
 
-/*
- * Bypass XML Parser (lua console)
- */
-
 /*
  * 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 = console_parse_platform;
   surf_parse_reset_callbacks();
-  surf_config_models_setup(NULL);
   MSG_create_environment(NULL);
   return 0;
 }
@@ -653,9 +719,8 @@ static int msg_register_platform(lua_State * L)
 
 static int sd_register_platform(lua_State * L)
 {
-  surf_parse = console_parse_platform_wsL07;
+  //surf_parse = console_parse_platform_wsL07;
   surf_parse_reset_callbacks();
-  surf_config_models_setup(NULL);
   SD_create_environment(NULL);
   return 0;
 }
@@ -665,10 +730,8 @@ static int sd_register_platform(lua_State * L)
  */
 static int gras_register_platform(lua_State * L)
 {
-  /* Tell Simgrid we dont wanna use surf parser */
-  surf_parse = console_parse_platform;
+  //surf_parse = console_parse_platform;
   surf_parse_reset_callbacks();
-  surf_config_models_setup(NULL);
   gras_create_environment(NULL);
   return 0;
 }
@@ -679,7 +742,7 @@ static int gras_register_platform(lua_State * L)
 static int msg_register_application(lua_State * L)
 {
   MSG_function_register_default(run_lua_code);
-  surf_parse = console_parse_application;
+  //surf_parse = console_parse_application;
   MSG_launch_application(NULL);
   return 0;
 }
@@ -690,12 +753,12 @@ static int msg_register_application(lua_State * L)
 static int gras_register_application(lua_State * L)
 {
   gras_function_register_default(run_lua_code);
-  surf_parse = console_parse_application;
+  //surf_parse = console_parse_application;
   gras_launch_application(NULL);
   return 0;
 }
 
-static const luaL_Reg simgrid_funcs[] = {
+static const luaL_Reg simgrid_functions[] = {
   {"create_environment", create_environment},
   {"launch_application", launch_application},
   {"debug", debug},
@@ -718,17 +781,18 @@ static const luaL_Reg simgrid_funcs[] = {
 };
 
 /* ********************************************************************************* */
-/*                       module management functions                                 */
+/*                           module management functions                             */
 /* ********************************************************************************* */
 
 #define LUA_MAX_ARGS_COUNT 10   /* maximum amount of arguments we can get from lua on command line */
 
-int luaopen_simgrid(lua_State *L);     // Fuck gcc: we don't need that prototype
-
 /**
- * This function is called automatically by the Lua interpreter when some Lua code requires
- * the "simgrid" module.
- * @param L the Lua state
+ * \brief Opens the simgrid Lua module.
+ *
+ * This function is called automatically by the Lua interpreter when some
+ * Lua code requires the "simgrid" module.
+ *
+ * \param L the Lua state
  */
 int luaopen_simgrid(lua_State *L)
 {
@@ -770,7 +834,11 @@ int luaopen_simgrid(lua_State *L)
   }
 
   /* Keep the context mechanism informed of our lua world today */
-  lua_maestro_state = L;
+  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);
 
@@ -778,30 +846,47 @@ int luaopen_simgrid(lua_State *L)
 }
 
 /**
- * Makes the appropriate Simgrid functions available to the Lua world.
- * @param L a Lua world
+ * \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 Makes the appropriate Simgrid functions available to the Lua world.
+ * \param L a Lua world
  */
 void register_c_functions(lua_State *L) {
 
   /* register the core C functions to lua */
-  luaL_register(L, "simgrid", simgrid_funcs);
+  luaL_register(L, "simgrid", simgrid_functions);
 
   /* register the task methods to lua */
-  luaL_openlib(L, TASK_MODULE_NAME, Task_methods, 0);   // create methods table, add it to the globals
+  luaL_openlib(L, TASK_MODULE_NAME, task_functions, 0);   // create methods table, add it to the globals
   luaL_newmetatable(L, TASK_MODULE_NAME);       // create metatable for Task, add it to the Lua registry
-  luaL_openlib(L, 0, Task_meta, 0);     // fill metatable
+  luaL_openlib(L, 0, task_meta, 0);     // fill metatable
   lua_pushliteral(L, "__index");
   lua_pushvalue(L, -3);         // dup methods table
-  lua_rawset(L, -3);            // matatable.__index = methods
+  lua_rawset(L, -3);            // metatable.__index = methods
   lua_pushliteral(L, "__metatable");
   lua_pushvalue(L, -3);         // dup methods table
   lua_rawset(L, -3);            // hide metatable:metatable.__metatable = methods
   lua_pop(L, 1);                // drop metatable
 
   /* register the hosts methods to lua */
-  luaL_openlib(L, HOST_MODULE_NAME, Host_methods, 0);
+  luaL_openlib(L, HOST_MODULE_NAME, host_functions, 0);
   luaL_newmetatable(L, HOST_MODULE_NAME);
-  luaL_openlib(L, 0, Host_meta, 0);
+  luaL_openlib(L, 0, host_meta, 0);
   lua_pushliteral(L, "__index");
   lua_pushvalue(L, -3);
   lua_rawset(L, -3);
@@ -810,13 +895,48 @@ void register_c_functions(lua_State *L) {
   lua_rawset(L, -3);
   lua_pop(L, 1);
 
-  /* register the links methods to lua */
-  luaL_openlib(L, AS_MODULE_NAME, AS_methods, 0);
-  luaL_newmetatable(L, AS_MODULE_NAME);
+  /* register the platform methods to lua */
+  luaL_openlib(L, PLATF_MODULE_NAME, platf_functions, 0);
+  luaL_newmetatable(L, PLATF_MODULE_NAME);
   lua_pop(L, 1);
+}
 
-  /* register the Tracing functions to lua */
-  luaL_openlib(L, TRACE_MODULE_NAME, Trace_methods, 0);
-  luaL_newmetatable(L, TRACE_MODULE_NAME);
-  lua_pop(L, 1);
+/**
+ * \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]);
+
+  lua_State *L = sglua_clone_maestro();
+  int res = 1;
+
+  /* start the function */
+  lua_getglobal(L, argv[0]);
+  xbt_assert(lua_isfunction(L, -1),
+              "The lua function %s does not seem to exist", 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;
 }