-/* 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 <string.h> // memcpy
+#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"
-/**
- * @brief A chunk of memory.
- *
- * TODO replace this by a dynar
- */
-typedef struct s_buffer {
- char* data;
- size_t size;
- size_t capacity;
-} s_buffer_t, *buffer_t;
-
-static const char* value_tostring(lua_State* L, int index);
-static const char* keyvalue_tostring(lua_State* L, int key_index, int value_index);
-static void stack_dump(const char *msg, lua_State* L);
-static int writer(lua_State* L, const void* source, size_t size, void* userdata);
-static void move_value(lua_State* dst, lua_State* src, const char* name);
-static int l_get_from_father(lua_State* L);
-static lua_State *clone_lua_state(lua_State* L);
-static m_task_t check_task(lua_State *L, int index);
+static lua_State* sglua_maestro_state;
+
+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 */
+/* simgrid.task API */
/* ********************************************************************************* */
/**
- * @brief Returns a string representation of a value in the Lua stack.
- *
- * This function is for debugging purposes.
- * It always returns the same pointer.
- *
- * @param L the Lua state
- * @param index index in the stack
- * @return a string representation of the value at this index
- */
-static const char* value_tostring(lua_State* L, int index) {
-
- static char buff[64];
-
- switch (lua_type(L, index)) {
-
- case LUA_TNIL:
- sprintf(buff, "nil");
- break;
-
- case LUA_TNUMBER:
- sprintf(buff, "%.3f", lua_tonumber(L, index));
- break;
-
- case LUA_TBOOLEAN:
- sprintf(buff, "%s", lua_toboolean(L, index) ? "true" : "false");
- break;
-
- case LUA_TSTRING:
- snprintf(buff, 63, "'%s'", lua_tostring(L, index));
- break;
-
- case LUA_TFUNCTION:
- if (lua_iscfunction(L, index)) {
- sprintf(buff, "C-function");
- }
- else {
- sprintf(buff, "function");
- }
- break;
-
- case LUA_TTABLE:
- sprintf(buff, "table(%zu)", lua_objlen(L, index));
- break;
-
- case LUA_TLIGHTUSERDATA:
- case LUA_TUSERDATA:
- sprintf(buff, "userdata(%p)", lua_touserdata(L, index));
- break;
-
- case LUA_TTHREAD:
- sprintf(buff, "thread");
- break;
- }
- return buff;
-}
-
-/**
- * @brief Returns a string representation of a key-value pair.
- *
- * This function is for debugging purposes.
- * It always returns the same pointer.
- *
- * @param L the Lua state
- * @param key_index index of the key
- * @param value_index index of the value
- * @return a string representation of the key-value pair
- */
-static const char* keyvalue_tostring(lua_State* L, int key_index, int value_index) {
-
- static char buff[64];
- /* value_tostring also always returns the same pointer */
- int len = snprintf(buff, 63, "%s -> ", value_tostring(L, key_index));
- snprintf(buff + len, 63 - len, "%s", value_tostring(L, value_index));
- return buff;
-}
-
-/**
- * @brief Returns a string composed of the specified number of spaces.
- *
- * This function is for debugging purposes.
- * It always returns the same pointer.
- *
- * @param length length of the string
- * @return a string of this length with only spaces
- */
-static const char* get_spaces(int length) {
-
- static char spaces[128];
-
- xbt_assert(length < 128);
- memset(spaces, ' ', length);
- spaces[length] = '\0';
- return spaces;
-}
-
-/**
- * @brief Dumps the Lua stack if debug logs are enabled.
- * @param msg a message to print
- * @param L a Lua state
- */
-static void stack_dump(const char* msg, lua_State* L)
-{
- if (XBT_LOG_ISENABLED(lua, xbt_log_priority_debug)) {
- char buff[2048];
- char* p = buff;
- int i;
- int top = lua_gettop(L);
-
- if (1) return;
-
- fflush(stdout);
-
- p[0] = '\0';
- for (i = 1; i <= top; i++) { /* repeat for each level */
-
- p += sprintf(p, "%s", value_tostring(L, i));
- p += sprintf(p, " "); /* put a separator */
- }
- XBT_DEBUG("%s%s", msg, buff);
- }
-}
-
-/**
- * @brief Writes the specified data into a memory buffer.
- *
- * This function is a valid lua_Writer that writes into a memory buffer passed
- * as userdata.
- *
- * @param L a lua state
- * @param source some data
- * @param sz number of bytes of data
- * @param user_data the memory buffer to write
- */
-static int writer(lua_State* L, const void* source, size_t size, void* userdata) {
-
- buffer_t buffer = (buffer_t) userdata;
- while (buffer->capacity < buffer->size + size) {
- buffer->capacity *= 2;
- buffer->data = xbt_realloc(buffer->data, buffer->capacity);
- }
- memcpy(buffer->data + buffer->size, source, size);
- buffer->size += size;
-
- return 0;
-}
-
-/**
- * @brief Pops a value from the stack of a source state and pushes it on the
- * stack of another state.
- *
- * If the value is a table, its content is copied recursively. To avoid cycles,
- * a table of previsously visited tables must be present at index 1 of dst.
- * Its keys are pointers to visited tables in src and its values are the tables
- * already built.
- *
- * TODO: add support of closures
- *
- * @param src the source state
- * @param dst the destination state
- * @param name a name describing the value
- */
-static void move_value(lua_State* dst, lua_State *src, const char* name) {
-
- luaL_checkany(src, -1); /* check the value to copy */
- luaL_checktype(dst, 1, LUA_TTABLE); /* check the presence of a table of
- previously visited tables */
-
- int indentation_level = (lua_gettop(dst) - 1) * 6;
- const char* indent = get_spaces(indentation_level);
-
- XBT_DEBUG("%sCopying value %s", indent, name);
- indent = get_spaces(indentation_level + 2);
-
- stack_dump("src before copying a value (should be ... value): ", src);
- stack_dump("dst before copying a value (should be visited ...): ", dst);
-
- switch (lua_type(src, -1)) {
-
- case LUA_TNIL:
- lua_pushnil(dst);
- break;
-
- case LUA_TNUMBER:
- lua_pushnumber(dst, lua_tonumber(src, -1));
- break;
-
- case LUA_TBOOLEAN:
- lua_pushboolean(dst, lua_toboolean(src, -1));
- break;
-
- case LUA_TSTRING:
- /* no worries about memory: lua_pushstring makes a copy */
- lua_pushstring(dst, lua_tostring(src, -1));
- break;
-
- case LUA_TFUNCTION:
- /* it's a function that does not exist yet in L2 */
-
- if (lua_iscfunction(src, -1)) {
- /* it's a C function: just copy the pointer */
- lua_CFunction f = lua_tocfunction(src, -1);
- lua_pushcfunction(dst, f);
- }
- else {
- /* it's a Lua function: dump it from src */
- XBT_DEBUG("%sDumping Lua function '%s'", indent, name);
-
- s_buffer_t buffer;
- buffer.capacity = 64;
- buffer.size = 0;
- buffer.data = xbt_new(char, buffer.capacity);
-
- /* copy the binary chunk from src into a buffer */
- int error = lua_dump(src, writer, &buffer);
- xbt_assert(!error, "Failed to dump function '%s' from the source state: error %d",
- name, error);
-
- /* load the chunk into dst */
- error = luaL_loadbuffer(dst, buffer.data, buffer.size, name);
- xbt_assert(!error, "Failed to load function '%s' from the source state: %s",
- name, lua_tostring(dst, -1));
- XBT_DEBUG("%sFunction '%s' successfully dumped from source state.", indent, name);
- }
- break;
-
- case LUA_TTABLE:
-
- /* see if this table was already visited */
- lua_pushlightuserdata(dst, (void*) lua_topointer(src, -1));
- /* dst: visited ... psrctable */
- lua_gettable(dst, 1);
- /* dst: visited ... table/nil */
- if (lua_istable(dst, -1)) {
- XBT_DEBUG("%sNothing to do: table already visited", indent);
- /* dst: visited ... table */
- }
- else {
- XBT_DEBUG("%sFirst visit of this table", indent);
- /* dst: visited ... nil */
- lua_pop(dst, 1);
- /* dst: visited ... */
-
- /* first visit: create the new table in dst */
- lua_newtable(dst);
- /* dst: visited ... table */
-
- /* mark the table as visited to avoid infinite recursion */
- lua_pushlightuserdata(dst, (void*) lua_topointer(src, -1));
- /* dst: visited ... table psrctable */
- lua_pushvalue(dst, -2);
- /* dst: visited ... table psrctable table */
- lua_settable(dst, 1);
- /* dst: visited ... table */
- XBT_DEBUG("%sTable marked as visited", indent);
-
- stack_dump("dst after marking the table as visited (should be visited ... table): ", dst);
-
- /* copy the metatable if any */
- int has_meta_table = lua_getmetatable(src, -1);
- /* src: ... table mt? */
- if (has_meta_table) {
- XBT_DEBUG("%sCopying metatable", indent);
- /* src: ... table mt */
- move_value(dst, src, "metatable");
- /* src: ... table
- dst: visited ... table mt */
- lua_setmetatable(dst, -2);
- /* dst: visited ... table */
- }
- else {
- XBT_DEBUG("%sNo metatable", indent);
- }
-
- stack_dump("src before traversing the table (should be ... table): ", src);
- stack_dump("dst before traversing the table (should be visited ... table): ", dst);
-
- /* traverse the table of src and copy each element */
- lua_pushnil(src);
- /* src: ... table nil */
- while (lua_next(src, -2) != 0) {
- /* src: ... table key value */
-
- XBT_DEBUG("%sCopying table element %s", indent, keyvalue_tostring(src, -2, -1));
- indent = get_spaces(indentation_level + 4);
-
- stack_dump("src before copying table element (should be ... table key value): ", src);
- stack_dump("dst before copying table element (should be visited ... table): ", dst);
-
- /* copy the key */
- lua_pushvalue(src, -2);
- /* src: ... table key value key */
- XBT_DEBUG("%sCopying the key part of the table element", indent);
- move_value(dst, src, value_tostring(src, -1));
- /* src: ... table key value
- dst: visited ... table key */
- XBT_DEBUG("%sCopied the key part of the table element", indent);
-
- /* copy the value */
- XBT_DEBUG("%sCopying the value part of the table element", indent);
- move_value(dst, src, value_tostring(src, -1));
- /* src: ... table key
- dst: visited ... table key value */
- XBT_DEBUG("%sCopied the value part of the table element", indent);
-
- /* set the table element */
- lua_settable(dst, -3);
- /* dst: visited ... table */
-
- /* the key stays on top of src for next iteration */
- stack_dump("src before next iteration (should be ... table key): ", src);
- stack_dump("dst before next iteration (should be visited ... table): ", dst);
-
- indent = get_spaces(indentation_level + 2);
- }
- XBT_DEBUG("%sFinished traversing the table", indent);
- }
- break;
-
- case LUA_TLIGHTUSERDATA:
- lua_pushlightuserdata(dst, lua_touserdata(src, -1));
- break;
-
- case LUA_TUSERDATA:
- XBT_WARN("Copying a full userdata is not supported yet.");
- lua_pushnil(dst);
- break;
-
- case LUA_TTHREAD:
- XBT_WARN("Cannot copy a thread from the source state.");
- lua_pushnil(dst);
- break;
- }
-
- /* pop the value from src */
- lua_pop(src, 1);
-
- indent = get_spaces(indentation_level);
- XBT_DEBUG("%sCopied the value", indent);
-
- stack_dump("src after copying a value (should be ...): ", src);
- stack_dump("dst after copying a value (should be visited ... value): ", dst);
-}
-
-/**
- * @brief Copies a global value from the father state.
- *
- * The state L must have a father, i.e. it should have been created by
- * clone_lua_state().
- * This function is meant to be an __index metamethod.
- * Consequently, it assumes that the stack has two elements:
- * a table (usually the environment of L) and the string key of a value
- * that does not exist yet in this table. It copies the corresponding global
- * value from the father state and pushes it on the stack of L.
- * If the global value does not exist in the father state either, nil is
- * pushed.
- *
- * TODO: make this function thread safe. If the simulation runs in parallel,
- * several simulated processes may trigger this __index metamethod at the same
- * time and get globals from maestro.
- *
- * @param L the current state
- * @return number of return values pushed (always 1)
+ * \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 int l_get_from_father(lua_State *L) {
-
- /* retrieve the father */
- lua_getfield(L, LUA_REGISTRYINDEX, "simgrid.father_state");
- lua_State* father = lua_touserdata(L, -1);
- xbt_assert(father != NULL, "This Lua state has no father");
- lua_pop(L, 1);
-
- /* get the global from the father */
- const char* key = luaL_checkstring(L, 2); /* L: table key */
- lua_getglobal(father, key); /* father: ... value */
- XBT_DEBUG("__index of '%s' begins", key);
-
- /* push the value onto the stack of L */
- lua_newtable(L); /* L: table key visited */
- lua_insert(L, 1); /* L: visited table key */
- move_value(L, father, key); /* father: ...
- L: visited table key value */
- lua_remove(L, 1); /* L: table key value */
-
- /* prepare the return value of __index */
- lua_pushvalue(L, -1); /* L: table key value value */
- lua_insert(L, 1); /* L: value table key value */
-
- /* save the copied value in the table for subsequent accesses */
- lua_settable(L, -3); /* L: value table */
- lua_remove(L, 2); /* L: value */
-
- XBT_DEBUG("__index of '%s' returns %s", key, value_tostring(L, -1));
-
- return 1;
-}
-
-/**
- * @brief Creates a new Lua state and get its environment from an existing state.
- *
- * The state created is independent from the existing one and has its own
- * copies of global variables and functions.
- * However, the global variables and functions are not copied right now from
- * the original state; they are copied only the first time they are accessed.
- * This behavior saves time and memory, and is okay for Simgrid's needs.
- *
- * @param father an existing state
- * @return the state created
- */
-static lua_State* clone_lua_state(lua_State *father) {
-
- /* create the new state */
- lua_State *L = luaL_newstate();
-
- /* set its environment:
- * - create a table newenv
- * - create a metatable mt
- * - set mt.__index = a function that copies the global from the father state
- * - set mt as the metatable of newenv
- * - set newenv as the environment of the new state
- */
- lua_pushthread(L); /* thread */
- lua_newtable(L); /* thread newenv */
- lua_newtable(L); /* thread newenv mt */
- lua_pushcfunction(L, l_get_from_father); /* thread newenv mt f */
- lua_setfield(L, -2, "__index"); /* thread newenv mt */
- lua_setmetatable(L, -2); /* thread newenv */
- lua_setfenv(L, -2); /* thread */
- lua_pop(L, 1); /* -- */
-
- /* open the standard libs (theoretically, this is not necessary as they can
- * be inherited like any global values, but without a proper support of
- * closures, iterators like ipairs don't work). */
- luaL_openlibs(L);
-
- /* set a pointer to the father */
- lua_pushlightuserdata(L, father);
- lua_setfield(L, LUA_REGISTRYINDEX, "simgrid.father_state");
-
- /* copy the registry */
- lua_pushvalue(father, LUA_REGISTRYINDEX); /* father: ... reg */
- lua_newtable(L); /* L: visited */
- move_value(L, father, "registry"); /* father: ...
- L: visited newreg */
-
- /* set the pointer again */
- lua_pushlightuserdata(L, father); /* L: visited newreg father */
- lua_setfield(L, -1, "simgrid.father_state"); /* L: visited newreg */
- lua_replace(L, LUA_REGISTRYINDEX); /* L: visited */
- lua_pop(L, 1); /* L: -- */
-
- XBT_DEBUG("New state created");
-
- return L;
-}
-
-/**
- * @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
- */
-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)
+/**
+ * \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_pushstring(L, MSG_task_get_name(tk));
+ m_task_t task = sglua_checktask(L, 1);
+ lua_pushstring(L, MSG_task_get_name(task));
return 1;
}
-static int Task_computation_duration(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);
- lua_pushnumber(L, MSG_task_get_compute_duration(tk));
+ m_task_t task = sglua_checktask(L, 1);
+ lua_pushnumber(L, MSG_task_get_compute_duration(task));
return 1;
}
-static int Task_execute(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_execute(tk);
+ m_task_t task = sglua_checktask(L, 1);
+ int res = MSG_task_execute(task);
lua_pushnumber(L, res);
return 1;
}
-static int Task_destroy(lua_State * L)
-{
- m_task_t tk = checkTask(L, -1);
- int res = MSG_task_destroy(tk);
- lua_pushnumber(L, res);
- return 1;
-}
+/**
+ * \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);
+ }
-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
-
- 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");
("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) {
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;
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...");
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])
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;
+ return 0;
}
-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 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.
+ * \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 */
/* ********************************************************************************* */
return 0;
}
-
static int gras_generate(lua_State * L)
{
const char *project_name = luaL_checkstring(L, 1);
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}
-};
+/* ********************************************************************************* */
+/* simgrid.platf API */
+/* ********************************************************************************* */
-/*
- * 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}
+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}
};
-/**
- * Tracing Functions
- */
-static const luaL_reg Trace_methods[] = {
- {"start", trace_start},
- {"category", trace_category},
- {"setTaskCategory", trace_set_task_category},
- {"finish", trace_end},
- {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 = clone_lua_state(lua_maestro_state);
- 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 */
- 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;
-}
-
static int launch_application(lua_State * L)
{
const char *file = luaL_checkstring(L, 1);
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);
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);
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);
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;
}
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;
}
*/
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;
}
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;
}
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},
};
/* ********************************************************************************* */
-/* 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)
{
}
/* 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);
}
/**
- * 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
*/
-void register_c_functions(lua_State *L) {
+int sglua_is_maestro(lua_State* L) {
+ return L == sglua_maestro_state;
+}
- /* register the core C functions to lua */
- luaL_register(L, "simgrid", simgrid_funcs);
-
- /* register the task methods to lua */
- luaL_openlib(L, TASK_MODULE_NAME, Task_methods, 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
- lua_pushliteral(L, "__index");
- lua_pushvalue(L, -3); // dup methods table
- lua_rawset(L, -3); // matatable.__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);
+/**
+ * \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 userdata itself:
+ * this allows to write task:method(args) for
+ * simgrid.task.method(task, args) */
+ // FIXME: in the current implementation, a Lua task is a table with a
+ // __simgrid_task field that contains the userdata, so the OO-style
+ // writing doesn't work
+ 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);
- luaL_openlib(L, 0, Host_meta, 0);
- lua_pushliteral(L, "__index");
- lua_pushvalue(L, -3);
- lua_rawset(L, -3);
- lua_pushliteral(L, "__metatable");
- lua_pushvalue(L, -3);
- lua_rawset(L, -3);
- lua_pop(L, 1);
+ /* 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) {
- /* register the links methods to lua */
- luaL_openlib(L, AS_MODULE_NAME, AS_methods, 0);
- luaL_newmetatable(L, AS_MODULE_NAME);
+ luaL_openlib(L, PLATF_MODULE_NAME, platf_functions, 0);
+ /* simgrid.platf */
lua_pop(L, 1);
+}
+
+/**
+ * \brief Makes the Simgrid functions available to the Lua world.
+ * \param L a Lua world
+ */
+static void register_c_functions(lua_State *L) {
- /* register the Tracing functions to lua */
- luaL_openlib(L, TRACE_MODULE_NAME, Trace_methods, 0);
- luaL_newmetatable(L, TRACE_MODULE_NAME);
+ /* register the core C functions to lua */
+ luaL_register(L, "simgrid", simgrid_functions);
+ /* simgrid */
lua_pop(L, 1);
+ /* -- */
+ 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;
}
