/* 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. */
#include "simgrid_lua.h"
+#include <string.h> // memcpy
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua, bindings, "Lua Bindings");
-lua_State *simgrid_lua_state;
+static lua_State *lua_maestro_state;
#define TASK_MODULE_NAME "simgrid.Task"
#define HOST_MODULE_NAME "simgrid.Host"
-// Surf ( bypass XML )
+// 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"
+/**
+ * @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 void register_c_functions(lua_State *L);
+
/* ********************************************************************************* */
/* helper functions */
/* ********************************************************************************* */
-static void stackDump(const char *msg, lua_State * L)
+
+/**
+ * @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(%d)", 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 Dumps the Lua stack for debugging purposes.
+ * @param msg a message to print
+ * @param L a Lua state
+ */
+static void stack_dump(const char* msg, lua_State* L)
{
char buff[2048];
- char *p = buff;
+ char* p = buff;
int i;
int top = lua_gettop(L);
+// if (1) return;
+
fflush(stdout);
- p += sprintf(p, "STACK(top=%d): ", top);
+ p[0] = '\0';
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));
+ p += sprintf(p, "%s", value_tostring(L, i));
+ p += sprintf(p, " "); /* put a separator */
+ }
+ XBT_INFO("%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 upvalues
+ *
+ * @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 */
+
+ XBT_DEBUG("Copying value %s", name);
+
+ 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_TBOOLEAN: /* booleans */
- p += sprintf(p, lua_toboolean(L, i) ? "true" : "false");
+ case LUA_TSTRING:
+ /* no worries about memory: lua_pushstring makes a copy */
+ lua_pushstring(dst, lua_tostring(src, -1));
break;
- case LUA_TNUMBER: /* numbers */
- p += sprintf(p, "%g", lua_tonumber(L, i));
+ 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 */
+ XBT_DEBUG("Copying C function '%s'", name);
+ lua_CFunction f = lua_tocfunction(src, -1);
+ lua_pushcfunction(dst, f);
+ }
+ else {
+ /* it's a Lua function: dump it from src */
+ XBT_DEBUG("Dumping Lua function '%s'", 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("Function '%s' successfully dumped from source state.", name);
+ }
break;
case LUA_TTABLE:
- p += sprintf(p, "Table");
+
+ /* 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("Nothing to do: table already visited");
+ /* dst: visited ... table */
+ }
+ else {
+ XBT_DEBUG("First visit of this table");
+ /* 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("Table marked as visited");
+
+ 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("Copying metatable");
+ /* src: ... table mt */
+ move_value(dst, src, "metatable");
+ /* src: ... table
+ dst: visited ... table mt */
+ lua_setmetatable(dst, -2);
+ /* dst: visited ... table */
+ }
+ else {
+ XBT_DEBUG("No metatable");
+ }
+
+ 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("Copying table element %s", keyvalue_tostring(src, -2, -1));
+
+ 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("Copying the element key");
+ move_value(dst, src, value_tostring(src, -1));
+ /* src: ... table key value
+ dst: visited ... table key */
+ XBT_DEBUG("Copied the element key");
+
+ /* copy the value */
+ XBT_DEBUG("Copying the element value");
+ move_value(dst, src, value_tostring(src, -1));
+ /* src: ... table key
+ dst: visited ... table key value */
+ XBT_DEBUG("Copied the element value");
+
+ /* 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);
+ }
+ XBT_DEBUG("Finished traversing the 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));
- }*/
+ case LUA_TLIGHTUSERDATA:
+ lua_pushlightuserdata(dst, lua_touserdata(src, -1));
break;
- }
- p += sprintf(p, " "); /* put a separator */
+ case LUA_TUSERDATA:
+ XBT_WARN("Cannot copy a full userdata from the source state.");
+ lua_pushnil(dst);
+ break;
+
+ case LUA_TTHREAD:
+ XBT_WARN("Cannot copy a thread from the source state.");
+ lua_pushnil(dst);
+ break;
}
- XBT_INFO("%s%s", msg, buff);
+
+ /* pop the value from src */
+ lua_pop(src, 1);
+
+ 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)
+ */
+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) */
+ luaL_openlibs(L);
+
+ /* put a pointer to the father */
+ lua_pushlightuserdata(L, father);
+ lua_setfield(L, LUA_REGISTRYINDEX, "simgrid.father_state");
+
+ 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 */
+/**
+ * @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)
{
m_task_t *pi, tk;
/* * * *
* * Constructors * *
* * * */
+
/**
- * Construct an new task with the specified processing amount and amount
+ * @brief Constructs a new task with the specified processing amount and amount
* of data needed.
*
* @param name Task's name
return Task_recv_with_timeout(L);
}
-/**
- * Static Binding for the Splay method event.sleep :
- * it uses MSG_task_irecv with MSG_comm_wait
- *
-static int Task_splay_irecv(lua_State *L)
-{
- m_task_t task = NULL;
- msg_comm_t comm = NULL; // current communication to receive
- const char *mailbox = luaL_checkstring(L, -2);
- double timeout = luaL_checknumber(L, -1);
- comm = MSG_task_irecv(&task, mailbox);
- MSG_comm_wait(comm, timeout);
- if (MSG_comm_get_status(comm) == MSG_OK)
- {
- XBT_DEBUG("Task_splay_irecv: Received task %s", MSG_task_get_name(task));
- lua_State *sender_stack = MSG_task_get_data(task);
- lua_xmove(sender_stack, L, 1); // move the data directly from the sender's stack
- MSG_task_set_data(task, NULL);
- }
- else {
- XBT_DEBUG("Task_splay_irecv: Timeout!");
- lua_pushnil(L);
- }
- MSG_comm_destroy(comm);
- return 1;
-}
-
-static int Task_splay_isend(lua_State *L)
-{
- m_task_t tk = checkTask(L, 1);
- const char *mailbox = luaL_checkstring(L, 2);
- lua_pop(L, 1); // remove the string from the stack so that the task is on top of it
- MSG_task_set_data(tk, L); // copy my stack onto the task, so that the receiver can get the lua task directly
- MSG_task_isend(tk, mailbox);
-
- return 1;
-}
-*/
-
static const luaL_reg Task_methods[] = {
{"new", Task_new},
{"name", Task_get_name},
{"send", Task_send},
{"recv", Task_recv},
{"recv_timeout", Task_recv_with_timeout},
-/*
- {"splay_recv", Task_splay_irecv},
- {"iSend", Task_splay_isend},
-*/
{NULL, NULL}
};
return 1;
}
-
static int Host_get_name(lua_State * L)
{
m_host_t ht = checkHost(L, -1);
static int 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));
- *lua_host = host;
- luaL_getmetatable(L, HOST_MODULE_NAME);
- lua_setmetatable(L, -2);
- lua_setfield(L, -2, "__simgrid_host");
- return 1;
-
+ 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));
+ *lua_host = host;
+ luaL_getmetatable(L, HOST_MODULE_NAME);
+ lua_setmetatable(L, -2);
+ lua_setfield(L, -2, "__simgrid_host");
+ return 1;
}
static int Host_get_property_value(lua_State * L)
{
- m_host_t ht = checkHost(L, -2);
- const char *prop = luaL_checkstring(L, -1);
- lua_pushstring(L,MSG_host_get_property_value(ht,prop));
- return 1;
+ m_host_t ht = checkHost(L, -2);
+ const char *prop = luaL_checkstring(L, -1);
+ lua_pushstring(L,MSG_host_get_property_value(ht,prop));
+ return 1;
}
static int Host_sleep(lua_State *L)
{
- int time = luaL_checknumber(L, -1);
- MSG_process_sleep(time);
- return 1;
+ int time = luaL_checknumber(L, -1);
+ MSG_process_sleep(time);
+ return 1;
}
static int Host_destroy(lua_State *L)
{
- m_host_t ht = checkHost(L, -1);
- __MSG_host_destroy(ht);
- return 1;
+ m_host_t ht = checkHost(L, -1);
+ __MSG_host_destroy(ht);
+ return 1;
}
/* ********************************************************************************* */
#endif
return 1;
}
-//***********Register Methods *******************************************//
+
+// *********** Register Methods ******************************************* //
+
/*
* Host Methods
*/
{"name", Host_get_name},
{"number", Host_number},
{"at", Host_at},
- {"self",Host_self},
+ {"self", Host_self},
{"getPropValue", Host_get_property_value},
{"sleep", Host_sleep},
- {"destroy",Host_destroy},
+ {"destroy", Host_destroy},
// Bypass XML Methods
{"setFunction", console_set_function},
{"setProperty", console_host_set_property},
- {0, 0}
+ {NULL, NULL}
};
static int Host_gc(lua_State * L)
*/
static const luaL_reg AS_methods[] = {
{"new", console_add_AS},
- {"addHost",console_add_host},
- {"addLink",console_add_link},
- {"addRoute",console_add_route},
- {0, 0}
+ {"addHost", console_add_host},
+ {"addLink", console_add_link},
+ {"addRoute", 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},
- {0,0}
+ {"start", trace_start},
+ {"category", trace_category},
+ {"setTaskCategory", trace_set_task_category},
+ {"finish", trace_end},
+ {NULL, NULL}
};
+
/*
* Environment related
*/
-//extern lua_State *simgrid_lua_state;
-
+/**
+ * @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 = lua_newthread(simgrid_lua_state);
- int ref = luaL_ref(simgrid_lua_state, LUA_REGISTRYINDEX); /* protect the thread from being garbage collected */
+
+ lua_State *L = clone_lua_state(lua_maestro_state);
int res = 1;
- /* start the co-routine */
+ /* 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]);
lua_pop(L, 1); /* pop returned value */
}
- /* cleanups */
- luaL_unref(simgrid_lua_state, LUA_REGISTRYINDEX, ref);
- XBT_DEBUG("Execution of lua code %s is over", (argv ? argv[0] : "(null)"));
+ XBT_DEBUG("Execution of Lua code %s is over", (argv ? argv[0] : "(null)"));
+
return res;
}
return 0;
}
-#include "simix/simix.h" //FIXME: KILLME when debugging on simix internals become useless
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);
-
-/*
- xbt_dict_t hosts = SIMIX_host_get_dict();
- smx_host_t host;
- xbt_dict_cursor_t c;
- const char *name;
-
- xbt_dict_foreach(hosts, c, name, host) {
- XBT_DEBUG("We have an host %s", SIMIX_host_get_name(host));
- }
-*/
-
return 0;
}
/* ********************************************************************************* */
#define LUA_MAX_ARGS_COUNT 10 /* maximum amount of arguments we can get from lua on command line */
-#define TEST
-int luaopen_simgrid(lua_State * L); // Fuck gcc: we don't need that prototype
-int luaopen_simgrid(lua_State * L)
+
+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
+ */
+int luaopen_simgrid(lua_State *L)
{
- XBT_DEBUG("Luaopen_Simgrid *****");
+ 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? */
- /* Get the command line arguments from the lua interpreter */
+
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
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 */
+ lua_maestro_state = L;
+
+ register_c_functions(L);
+
+ return 1;
+}
+
+/**
+ * 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);
+
/* 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, 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_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
+ 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, TRACE_MODULE_NAME, Trace_methods, 0);
luaL_newmetatable(L, TRACE_MODULE_NAME);
lua_pop(L, 1);
-
- /* Keep the context mechanism informed of our lua world today */
- simgrid_lua_state = L;
- return 1;
}
