1 /* SimGrid Lua bindings */
3 /* Copyright (c) 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "simgrid_lua.h"
9 #include <string.h> // memcpy
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua, bindings, "Lua Bindings");
13 static lua_State *lua_maestro_state;
15 #define TASK_MODULE_NAME "simgrid.Task"
16 #define HOST_MODULE_NAME "simgrid.Host"
18 #define LINK_MODULE_NAME "simgrid.Link"
19 #define ROUTE_MODULE_NAME "simgrid.Route"
20 #define AS_MODULE_NAME "simgrid.AS"
21 #define TRACE_MODULE_NAME "simgrid.Trace"
24 * @brief A chunk of memory.
26 * TODO replace this by a dynar
28 typedef struct s_buffer {
32 } s_buffer_t, *buffer_t;
34 static const char* value_tostring(lua_State* L, int index);
35 static const char* keyvalue_tostring(lua_State* L, int key_index, int value_index);
36 static void stack_dump(const char *msg, lua_State* L);
37 static int writer(lua_State* L, const void* source, size_t size, void* userdata);
38 static void move_value(lua_State* dst, lua_State* src, const char* name);
39 static int l_get_from_father(lua_State* L);
40 static lua_State *clone_lua_state(lua_State* L);
41 static m_task_t check_task(lua_State *L, int index);
42 static void register_c_functions(lua_State *L);
44 /* ********************************************************************************* */
45 /* helper functions */
46 /* ********************************************************************************* */
49 * @brief Returns a string representation of a value in the Lua stack.
51 * This function is for debugging purposes.
52 * It always returns the same pointer.
54 * @param L the Lua state
55 * @param index index in the stack
56 * @return a string representation of the value at this index
58 static const char* value_tostring(lua_State* L, int index) {
62 switch (lua_type(L, index)) {
69 sprintf(buff, "%.3f", lua_tonumber(L, index));
73 sprintf(buff, "%s", lua_toboolean(L, index) ? "true" : "false");
77 snprintf(buff, 63, "'%s'", lua_tostring(L, index));
81 if (lua_iscfunction(L, index)) {
82 sprintf(buff, "C-function");
85 sprintf(buff, "function");
90 sprintf(buff, "table(%zu)", lua_objlen(L, index));
93 case LUA_TLIGHTUSERDATA:
95 sprintf(buff, "userdata(%p)", lua_touserdata(L, index));
99 sprintf(buff, "thread");
106 * @brief Returns a string representation of a key-value pair.
108 * This function is for debugging purposes.
109 * It always returns the same pointer.
111 * @param L the Lua state
112 * @param key_index index of the key
113 * @param value_index index of the value
114 * @return a string representation of the key-value pair
116 static const char* keyvalue_tostring(lua_State* L, int key_index, int value_index) {
118 static char buff[64];
119 /* value_tostring also always returns the same pointer */
120 int len = snprintf(buff, 63, "%s -> ", value_tostring(L, key_index));
121 snprintf(buff + len, 63 - len, "%s", value_tostring(L, value_index));
126 * @brief Returns a string composed of the specified number of spaces.
128 * This function is for debugging purposes.
129 * It always returns the same pointer.
131 * @param length length of the string
132 * @return a string of this length with only spaces
134 static const char* get_spaces(int length) {
136 static char spaces[128];
138 xbt_assert(length < 128);
139 memset(spaces, ' ', length);
140 spaces[length] = '\0';
145 * @brief Dumps the Lua stack if debug logs are enabled.
146 * @param msg a message to print
147 * @param L a Lua state
149 static void stack_dump(const char* msg, lua_State* L)
151 if (XBT_LOG_ISENABLED(lua, xbt_log_priority_debug)) {
155 int top = lua_gettop(L);
162 for (i = 1; i <= top; i++) { /* repeat for each level */
164 p += sprintf(p, "%s", value_tostring(L, i));
165 p += sprintf(p, " "); /* put a separator */
167 XBT_DEBUG("%s%s", msg, buff);
172 * @brief Writes the specified data into a memory buffer.
174 * This function is a valid lua_Writer that writes into a memory buffer passed
177 * @param L a lua state
178 * @param source some data
179 * @param sz number of bytes of data
180 * @param user_data the memory buffer to write
182 static int writer(lua_State* L, const void* source, size_t size, void* userdata) {
184 buffer_t buffer = (buffer_t) userdata;
185 while (buffer->capacity < buffer->size + size) {
186 buffer->capacity *= 2;
187 buffer->data = xbt_realloc(buffer->data, buffer->capacity);
189 memcpy(buffer->data + buffer->size, source, size);
190 buffer->size += size;
196 * @brief Pops a value from the stack of a source state and pushes it on the
197 * stack of another state.
199 * If the value is a table, its content is copied recursively. To avoid cycles,
200 * a table of previsously visited tables must be present at index 1 of dst.
201 * Its keys are pointers to visited tables in src and its values are the tables
204 * TODO: add support of closures
206 * @param src the source state
207 * @param dst the destination state
208 * @param name a name describing the value
210 static void move_value(lua_State* dst, lua_State *src, const char* name) {
212 luaL_checkany(src, -1); /* check the value to copy */
213 luaL_checktype(dst, 1, LUA_TTABLE); /* check the presence of a table of
214 previously visited tables */
216 int indentation_level = (lua_gettop(dst) - 1) * 6;
217 const char* indent = get_spaces(indentation_level);
219 XBT_DEBUG("%sCopying value %s", indent, name);
220 indent = get_spaces(indentation_level + 2);
222 stack_dump("src before copying a value (should be ... value): ", src);
223 stack_dump("dst before copying a value (should be visited ...): ", dst);
225 switch (lua_type(src, -1)) {
232 lua_pushnumber(dst, lua_tonumber(src, -1));
236 lua_pushboolean(dst, lua_toboolean(src, -1));
240 /* no worries about memory: lua_pushstring makes a copy */
241 lua_pushstring(dst, lua_tostring(src, -1));
245 /* it's a function that does not exist yet in L2 */
247 if (lua_iscfunction(src, -1)) {
248 /* it's a C function: just copy the pointer */
249 lua_CFunction f = lua_tocfunction(src, -1);
250 lua_pushcfunction(dst, f);
253 /* it's a Lua function: dump it from src */
254 XBT_DEBUG("%sDumping Lua function '%s'", indent, name);
257 buffer.capacity = 64;
259 buffer.data = xbt_new(char, buffer.capacity);
261 /* copy the binary chunk from src into a buffer */
262 int error = lua_dump(src, writer, &buffer);
263 xbt_assert(!error, "Failed to dump function '%s' from the source state: error %d",
266 /* load the chunk into dst */
267 error = luaL_loadbuffer(dst, buffer.data, buffer.size, name);
268 xbt_assert(!error, "Failed to load function '%s' from the source state: %s",
269 name, lua_tostring(dst, -1));
270 XBT_DEBUG("%sFunction '%s' successfully dumped from source state.", indent, name);
276 /* see if this table was already visited */
277 lua_pushlightuserdata(dst, (void*) lua_topointer(src, -1));
278 /* dst: visited ... psrctable */
279 lua_gettable(dst, 1);
280 /* dst: visited ... table/nil */
281 if (lua_istable(dst, -1)) {
282 XBT_DEBUG("%sNothing to do: table already visited", indent);
283 /* dst: visited ... table */
286 XBT_DEBUG("%sFirst visit of this table", indent);
287 /* dst: visited ... nil */
289 /* dst: visited ... */
291 /* first visit: create the new table in dst */
293 /* dst: visited ... table */
295 /* mark the table as visited to avoid infinite recursion */
296 lua_pushlightuserdata(dst, (void*) lua_topointer(src, -1));
297 /* dst: visited ... table psrctable */
298 lua_pushvalue(dst, -2);
299 /* dst: visited ... table psrctable table */
300 lua_settable(dst, 1);
301 /* dst: visited ... table */
302 XBT_DEBUG("%sTable marked as visited", indent);
304 stack_dump("dst after marking the table as visited (should be visited ... table): ", dst);
306 /* copy the metatable if any */
307 int has_meta_table = lua_getmetatable(src, -1);
308 /* src: ... table mt? */
309 if (has_meta_table) {
310 XBT_DEBUG("%sCopying metatable", indent);
311 /* src: ... table mt */
312 move_value(dst, src, "metatable");
314 dst: visited ... table mt */
315 lua_setmetatable(dst, -2);
316 /* dst: visited ... table */
319 XBT_DEBUG("%sNo metatable", indent);
322 stack_dump("src before traversing the table (should be ... table): ", src);
323 stack_dump("dst before traversing the table (should be visited ... table): ", dst);
325 /* traverse the table of src and copy each element */
327 /* src: ... table nil */
328 while (lua_next(src, -2) != 0) {
329 /* src: ... table key value */
331 XBT_DEBUG("%sCopying table element %s", indent, keyvalue_tostring(src, -2, -1));
332 indent = get_spaces(indentation_level + 4);
334 stack_dump("src before copying table element (should be ... table key value): ", src);
335 stack_dump("dst before copying table element (should be visited ... table): ", dst);
338 lua_pushvalue(src, -2);
339 /* src: ... table key value key */
340 XBT_DEBUG("%sCopying the key part of the table element", indent);
341 move_value(dst, src, value_tostring(src, -1));
342 /* src: ... table key value
343 dst: visited ... table key */
344 XBT_DEBUG("%sCopied the key part of the table element", indent);
347 XBT_DEBUG("%sCopying the value part of the table element", indent);
348 move_value(dst, src, value_tostring(src, -1));
349 /* src: ... table key
350 dst: visited ... table key value */
351 XBT_DEBUG("%sCopied the value part of the table element", indent);
353 /* set the table element */
354 lua_settable(dst, -3);
355 /* dst: visited ... table */
357 /* the key stays on top of src for next iteration */
358 stack_dump("src before next iteration (should be ... table key): ", src);
359 stack_dump("dst before next iteration (should be visited ... table): ", dst);
361 indent = get_spaces(indentation_level + 2);
363 XBT_DEBUG("%sFinished traversing the table", indent);
367 case LUA_TLIGHTUSERDATA:
368 lua_pushlightuserdata(dst, lua_touserdata(src, -1));
372 XBT_WARN("Copying a full userdata is not supported yet.");
377 XBT_WARN("Cannot copy a thread from the source state.");
382 /* pop the value from src */
385 indent = get_spaces(indentation_level);
386 XBT_DEBUG("%sCopied the value", indent);
388 stack_dump("src after copying a value (should be ...): ", src);
389 stack_dump("dst after copying a value (should be visited ... value): ", dst);
393 * @brief Copies a global value from the father state.
395 * The state L must have a father, i.e. it should have been created by
397 * This function is meant to be an __index metamethod.
398 * Consequently, it assumes that the stack has two elements:
399 * a table (usually the environment of L) and the string key of a value
400 * that does not exist yet in this table. It copies the corresponding global
401 * value from the father state and pushes it on the stack of L.
402 * If the global value does not exist in the father state either, nil is
405 * TODO: make this function thread safe. If the simulation runs in parallel,
406 * several simulated processes may trigger this __index metamethod at the same
407 * time and get globals from maestro.
409 * @param L the current state
410 * @return number of return values pushed (always 1)
412 static int l_get_from_father(lua_State *L) {
414 /* retrieve the father */
415 lua_getfield(L, LUA_REGISTRYINDEX, "simgrid.father_state");
416 lua_State* father = lua_touserdata(L, -1);
417 xbt_assert(father != NULL, "This Lua state has no father");
420 /* get the global from the father */
421 const char* key = luaL_checkstring(L, 2); /* L: table key */
422 lua_getglobal(father, key); /* father: ... value */
423 XBT_DEBUG("__index of '%s' begins", key);
425 /* push the value onto the stack of L */
426 lua_newtable(L); /* L: table key visited */
427 lua_insert(L, 1); /* L: visited table key */
428 move_value(L, father, key); /* father: ...
429 L: visited table key value */
430 lua_remove(L, 1); /* L: table key value */
432 /* prepare the return value of __index */
433 lua_pushvalue(L, -1); /* L: table key value value */
434 lua_insert(L, 1); /* L: value table key value */
436 /* save the copied value in the table for subsequent accesses */
437 lua_settable(L, -3); /* L: value table */
438 lua_remove(L, 2); /* L: value */
440 XBT_DEBUG("__index of '%s' returns %s", key, value_tostring(L, -1));
446 * @brief Creates a new Lua state and get its environment from an existing state.
448 * The state created is independent from the existing one and has its own
449 * copies of global variables and functions.
450 * However, the global variables and functions are not copied right now from
451 * the original state; they are copied only the first time they are accessed.
452 * This behavior saves time and memory, and is okay for Simgrid's needs.
454 * @param father an existing state
455 * @return the state created
457 static lua_State* clone_lua_state(lua_State *father) {
459 /* create the new state */
460 lua_State *L = luaL_newstate();
462 /* set its environment:
463 * - create a table newenv
464 * - create a metatable mt
465 * - set mt.__index = a function that copies the global from the father state
466 * - set mt as the metatable of newenv
467 * - set newenv as the environment of the new state
469 lua_pushthread(L); /* thread */
470 lua_newtable(L); /* thread newenv */
471 lua_newtable(L); /* thread newenv mt */
472 lua_pushcfunction(L, l_get_from_father); /* thread newenv mt f */
473 lua_setfield(L, -2, "__index"); /* thread newenv mt */
474 lua_setmetatable(L, -2); /* thread newenv */
475 lua_setfenv(L, -2); /* thread */
476 lua_pop(L, 1); /* -- */
478 /* open the standard libs (theoretically, this is not necessary as they can
479 * be inherited like any global values, but without a proper support of
480 * closures, iterators like ipairs don't work). */
483 /* set a pointer to the father */
484 lua_pushlightuserdata(L, father);
485 lua_setfield(L, LUA_REGISTRYINDEX, "simgrid.father_state");
487 /* copy the registry */
488 lua_pushvalue(father, LUA_REGISTRYINDEX); /* father: ... reg */
489 lua_newtable(L); /* L: visited */
490 move_value(L, father, "registry"); /* father: ...
493 /* set the pointer again */
494 lua_pushlightuserdata(L, father); /* L: visited newreg father */
495 lua_setfield(L, -1, "simgrid.father_state"); /* L: visited newreg */
496 lua_replace(L, LUA_REGISTRYINDEX); /* L: visited */
497 lua_pop(L, 1); /* L: -- */
499 XBT_DEBUG("New state created");
505 * @brief Ensures that a userdata on the stack is a task
506 * and returns the pointer inside the userdata.
507 * @param L a Lua state
508 * @param index an index in the Lua stack
509 * @return the task at this index
511 static m_task_t checkTask(lua_State * L, int index)
514 luaL_checktype(L, index, LUA_TTABLE);
515 lua_getfield(L, index, "__simgrid_task");
516 pi = (m_task_t *) luaL_checkudata(L, -1, TASK_MODULE_NAME);
518 luaL_typerror(L, index, TASK_MODULE_NAME);
521 luaL_error(L, "null Task");
526 /* ********************************************************************************* */
527 /* wrapper functions */
528 /* ********************************************************************************* */
531 * A task is either something to compute somewhere, or something to exchange between two hosts (or both).
532 * It is defined by a computing amount and a message size.
541 * @brief Constructs a new task with the specified processing amount and amount
544 * @param name Task's name
546 * @param computeDuration A value of the processing amount (in flop) needed to process the task.
547 * If 0, then it cannot be executed with the execute() method.
548 * This value has to be >= 0.
550 * @param messageSize A value of amount of data (in bytes) needed to transfert this task.
551 * If 0, then it cannot be transfered with the get() and put() methods.
552 * This value has to be >= 0.
554 static int Task_new(lua_State * L)
556 XBT_DEBUG("Task new...");
557 const char *name = luaL_checkstring(L, 1);
558 int comp_size = luaL_checkint(L, 2);
559 int msg_size = luaL_checkint(L, 3);
560 m_task_t msg_task = MSG_task_create(name, comp_size, msg_size, NULL);
561 lua_newtable(L); /* create a table, put the userdata on top of it */
562 m_task_t *lua_task = (m_task_t *) lua_newuserdata(L, sizeof(m_task_t));
563 *lua_task = msg_task;
564 luaL_getmetatable(L, TASK_MODULE_NAME);
565 lua_setmetatable(L, -2);
566 lua_setfield(L, -2, "__simgrid_task"); /* put the userdata as field of the table */
567 /* remove the args from the stack */
574 static int Task_get_name(lua_State * L)
576 m_task_t tk = checkTask(L, -1);
577 lua_pushstring(L, MSG_task_get_name(tk));
581 static int Task_computation_duration(lua_State * L)
583 m_task_t tk = checkTask(L, -1);
584 lua_pushnumber(L, MSG_task_get_compute_duration(tk));
588 static int Task_execute(lua_State * L)
590 m_task_t tk = checkTask(L, -1);
591 int res = MSG_task_execute(tk);
592 lua_pushnumber(L, res);
596 static int Task_destroy(lua_State * L)
598 m_task_t tk = checkTask(L, -1);
599 int res = MSG_task_destroy(tk);
600 lua_pushnumber(L, res);
604 static int Task_send(lua_State * L)
606 //stackDump("send ",L);
607 m_task_t tk = checkTask(L, 1);
608 const char *mailbox = luaL_checkstring(L, 2);
609 lua_pop(L, 1); // remove the string so that the task is on top of it
610 MSG_task_set_data(tk, L); // Copy my stack into the task, so that the receiver can copy the lua task directly
611 MSG_error_t res = MSG_task_send(tk, mailbox);
612 while (MSG_task_get_data(tk) != NULL) // Don't mess up with my stack: the receiver didn't copy the data yet
613 MSG_process_sleep(0); // yield
618 XBT_DEBUG("MSG_task_send failed : Timeout");
620 case MSG_TRANSFER_FAILURE:
621 XBT_DEBUG("MSG_task_send failed : Transfer Failure");
623 case MSG_HOST_FAILURE:
624 XBT_DEBUG("MSG_task_send failed : Host Failure ");
628 ("MSG_task_send failed : Unexpected error , please report this bug");
634 static int Task_recv_with_timeout(lua_State *L)
637 const char *mailbox = luaL_checkstring(L, -2);
638 int timeout = luaL_checknumber(L, -1);
639 MSG_error_t res = MSG_task_receive_with_timeout(&tk, mailbox, timeout);
642 lua_State *sender_stack = MSG_task_get_data(tk);
643 lua_xmove(sender_stack, L, 1); // copy the data directly from sender's stack
644 MSG_task_set_data(tk, NULL);
649 XBT_DEBUG("MSG_task_receive failed : Timeout");
651 case MSG_TRANSFER_FAILURE:
652 XBT_DEBUG("MSG_task_receive failed : Transfer Failure");
654 case MSG_HOST_FAILURE:
655 XBT_DEBUG("MSG_task_receive failed : Host Failure ");
658 XBT_ERROR("MSG_task_receive failed : Unexpected error , please report this bug");
666 static int Task_recv(lua_State * L)
668 lua_pushnumber(L, -1.0);
669 return Task_recv_with_timeout(L);
672 static const luaL_reg Task_methods[] = {
674 {"name", Task_get_name},
675 {"computation_duration", Task_computation_duration},
676 {"execute", Task_execute},
677 {"destroy", Task_destroy},
680 {"recv_timeout", Task_recv_with_timeout},
684 static int Task_gc(lua_State * L)
686 m_task_t tk = checkTask(L, -1);
688 MSG_task_destroy(tk);
692 static int Task_tostring(lua_State * L)
694 lua_pushfstring(L, "Task :%p", lua_touserdata(L, 1));
698 static const luaL_reg Task_meta[] = {
700 {"__tostring", Task_tostring},
707 static m_host_t checkHost(lua_State * L, int index)
710 luaL_checktype(L, index, LUA_TTABLE);
711 lua_getfield(L, index, "__simgrid_host");
712 pi = (m_host_t *) luaL_checkudata(L, -1, HOST_MODULE_NAME);
714 luaL_typerror(L, index, HOST_MODULE_NAME);
717 luaL_error(L, "null Host");
722 static int Host_get_by_name(lua_State * L)
724 const char *name = luaL_checkstring(L, 1);
725 XBT_DEBUG("Getting Host from name...");
726 m_host_t msg_host = MSG_get_host_by_name(name);
728 luaL_error(L, "null Host : MSG_get_host_by_name failed");
730 lua_newtable(L); /* create a table, put the userdata on top of it */
731 m_host_t *lua_host = (m_host_t *) lua_newuserdata(L, sizeof(m_host_t));
732 *lua_host = msg_host;
733 luaL_getmetatable(L, HOST_MODULE_NAME);
734 lua_setmetatable(L, -2);
735 lua_setfield(L, -2, "__simgrid_host"); /* put the userdata as field of the table */
736 /* remove the args from the stack */
741 static int Host_get_name(lua_State * L)
743 m_host_t ht = checkHost(L, -1);
744 lua_pushstring(L, MSG_host_get_name(ht));
748 static int Host_number(lua_State * L)
750 lua_pushnumber(L, MSG_get_host_number());
754 static int Host_at(lua_State * L)
756 int index = luaL_checkinteger(L, 1);
757 m_host_t host = MSG_get_host_table()[index - 1]; // lua indexing start by 1 (lua[1] <=> C[0])
758 lua_newtable(L); /* create a table, put the userdata on top of it */
759 m_host_t *lua_host = (m_host_t *) lua_newuserdata(L, sizeof(m_host_t));
761 luaL_getmetatable(L, HOST_MODULE_NAME);
762 lua_setmetatable(L, -2);
763 lua_setfield(L, -2, "__simgrid_host"); /* put the userdata as field of the table */
768 static int Host_self(lua_State * L)
770 m_host_t host = MSG_host_self();
772 m_host_t *lua_host =(m_host_t *)lua_newuserdata(L,sizeof(m_host_t));
774 luaL_getmetatable(L, HOST_MODULE_NAME);
775 lua_setmetatable(L, -2);
776 lua_setfield(L, -2, "__simgrid_host");
780 static int Host_get_property_value(lua_State * L)
782 m_host_t ht = checkHost(L, -2);
783 const char *prop = luaL_checkstring(L, -1);
784 lua_pushstring(L,MSG_host_get_property_value(ht,prop));
788 static int Host_sleep(lua_State *L)
790 int time = luaL_checknumber(L, -1);
791 MSG_process_sleep(time);
795 static int Host_destroy(lua_State *L)
797 m_host_t ht = checkHost(L, -1);
798 __MSG_host_destroy(ht);
802 /* ********************************************************************************* */
803 /* lua_stub_generator functions */
804 /* ********************************************************************************* */
806 xbt_dict_t process_function_set;
807 xbt_dynar_t process_list;
808 xbt_dict_t machine_set;
809 static s_process_t process;
811 void s_process_free(void *process)
813 s_process_t *p = (s_process_t *) process;
815 for (i = 0; i < p->argc; i++)
821 static int gras_add_process_function(lua_State * L)
824 const char *process_host = luaL_checkstring(L, 1);
825 const char *process_function = luaL_checkstring(L, 2);
827 if (xbt_dict_is_empty(machine_set)
828 || xbt_dict_is_empty(process_function_set)
829 || xbt_dynar_is_empty(process_list)) {
830 process_function_set = xbt_dict_new();
831 process_list = xbt_dynar_new(sizeof(s_process_t), s_process_free);
832 machine_set = xbt_dict_new();
835 xbt_dict_set(machine_set, process_host, NULL, NULL);
836 xbt_dict_set(process_function_set, process_function, NULL, NULL);
839 process.argv = xbt_new(char *, 1);
840 process.argv[0] = xbt_strdup(process_function);
841 process.host = strdup(process_host);
844 while (lua_next(L, 3) != 0) {
845 arg = lua_tostring(L, -1);
848 xbt_realloc(process.argv, (process.argc) * sizeof(char *));
849 process.argv[(process.argc) - 1] = xbt_strdup(arg);
851 XBT_DEBUG("index = %f , arg = %s \n", lua_tonumber(L, -2),
852 lua_tostring(L, -1));
856 //add to the process list
857 xbt_dynar_push(process_list, &process);
862 static int gras_generate(lua_State * L)
864 const char *project_name = luaL_checkstring(L, 1);
865 generate_sim(project_name);
866 generate_rl(project_name);
867 generate_makefile_local(project_name);
871 /***********************************
873 **********************************/
874 static int trace_start(lua_State *L)
882 static int trace_category(lua_State * L)
885 TRACE_category(luaL_checkstring(L, 1));
890 static int trace_set_task_category(lua_State *L)
893 TRACE_msg_set_task_category(checkTask(L, -2), luaL_checkstring(L, -1));
898 static int trace_end(lua_State *L)
906 // *********** Register Methods ******************************************* //
911 static const luaL_reg Host_methods[] = {
912 {"getByName", Host_get_by_name},
913 {"name", Host_get_name},
914 {"number", Host_number},
917 {"getPropValue", Host_get_property_value},
918 {"sleep", Host_sleep},
919 {"destroy", Host_destroy},
920 // Bypass XML Methods
921 {"setFunction", console_set_function},
922 {"setProperty", console_host_set_property},
926 static int Host_gc(lua_State * L)
928 m_host_t ht = checkHost(L, -1);
934 static int Host_tostring(lua_State * L)
936 lua_pushfstring(L, "Host :%p", lua_touserdata(L, 1));
940 static const luaL_reg Host_meta[] = {
942 {"__tostring", Host_tostring},
949 static const luaL_reg AS_methods[] = {
950 {"new", console_add_AS},
951 {"addHost", console_add_host},
952 {"addLink", console_add_link},
953 {"addRoute", console_add_route},
960 static const luaL_reg Trace_methods[] = {
961 {"start", trace_start},
962 {"category", trace_category},
963 {"setTaskCategory", trace_set_task_category},
964 {"finish", trace_end},
969 * Environment related
973 * @brief Runs a Lua function as a new simulated process.
974 * @param argc number of arguments of the function
975 * @param argv name of the Lua function and array of its arguments
976 * @return result of the function
978 static int run_lua_code(int argc, char **argv)
980 XBT_DEBUG("Run lua code %s", argv[0]);
982 lua_State *L = clone_lua_state(lua_maestro_state);
985 /* start the function */
986 lua_getglobal(L, argv[0]);
987 xbt_assert(lua_isfunction(L, -1),
988 "The lua function %s does not seem to exist", argv[0]);
990 /* push arguments onto the stack */
992 for (i = 1; i < argc; i++)
993 lua_pushstring(L, argv[i]);
995 /* call the function */
997 err = lua_pcall(L, argc - 1, 1, 0);
998 xbt_assert(err == 0, "error running function `%s': %s", argv[0],
999 lua_tostring(L, -1));
1001 /* retrieve result */
1002 if (lua_isnumber(L, -1)) {
1003 res = lua_tonumber(L, -1);
1004 lua_pop(L, 1); /* pop returned value */
1007 XBT_DEBUG("Execution of Lua code %s is over", (argv ? argv[0] : "(null)"));
1012 static int launch_application(lua_State * L)
1014 const char *file = luaL_checkstring(L, 1);
1015 MSG_function_register_default(run_lua_code);
1016 MSG_launch_application(file);
1020 static int create_environment(lua_State * L)
1022 const char *file = luaL_checkstring(L, 1);
1023 XBT_DEBUG("Loading environment file %s", file);
1024 MSG_create_environment(file);
1028 static int debug(lua_State * L)
1030 const char *str = luaL_checkstring(L, 1);
1031 XBT_DEBUG("%s", str);
1035 static int info(lua_State * L)
1037 const char *str = luaL_checkstring(L, 1);
1038 XBT_INFO("%s", str);
1042 static int run(lua_State * L)
1048 static int clean(lua_State * L)
1055 * Bypass XML Parser (lua console)
1059 * Register platform for MSG
1061 static int msg_register_platform(lua_State * L)
1063 /* Tell Simgrid we dont wanna use its parser */
1064 surf_parse = console_parse_platform;
1065 surf_parse_reset_callbacks();
1066 surf_config_models_setup(NULL);
1067 MSG_create_environment(NULL);
1072 * Register platform for Simdag
1075 static int sd_register_platform(lua_State * L)
1077 surf_parse = console_parse_platform_wsL07;
1078 surf_parse_reset_callbacks();
1079 surf_config_models_setup(NULL);
1080 SD_create_environment(NULL);
1085 * Register platform for gras
1087 static int gras_register_platform(lua_State * L)
1089 /* Tell Simgrid we dont wanna use surf parser */
1090 surf_parse = console_parse_platform;
1091 surf_parse_reset_callbacks();
1092 surf_config_models_setup(NULL);
1093 gras_create_environment(NULL);
1098 * Register applicaiton for MSG
1100 static int msg_register_application(lua_State * L)
1102 MSG_function_register_default(run_lua_code);
1103 surf_parse = console_parse_application;
1104 MSG_launch_application(NULL);
1109 * Register application for gras
1111 static int gras_register_application(lua_State * L)
1113 gras_function_register_default(run_lua_code);
1114 surf_parse = console_parse_application;
1115 gras_launch_application(NULL);
1119 static const luaL_Reg simgrid_funcs[] = {
1120 {"create_environment", create_environment},
1121 {"launch_application", launch_application},
1127 {"platform", create_environment},
1128 {"application", launch_application},
1129 /* methods to bypass XML parser */
1130 {"msg_register_platform", msg_register_platform},
1131 {"sd_register_platform", sd_register_platform},
1132 {"msg_register_application", msg_register_application},
1133 {"gras_register_platform", gras_register_platform},
1134 {"gras_register_application", gras_register_application},
1135 /* gras sub generator method */
1136 {"gras_set_process_function", gras_add_process_function},
1137 {"gras_generate", gras_generate},
1141 /* ********************************************************************************* */
1142 /* module management functions */
1143 /* ********************************************************************************* */
1145 #define LUA_MAX_ARGS_COUNT 10 /* maximum amount of arguments we can get from lua on command line */
1147 int luaopen_simgrid(lua_State *L); // Fuck gcc: we don't need that prototype
1150 * This function is called automatically by the Lua interpreter when some Lua code requires
1151 * the "simgrid" module.
1152 * @param L the Lua state
1154 int luaopen_simgrid(lua_State *L)
1156 XBT_DEBUG("luaopen_simgrid *****");
1158 /* Get the command line arguments from the lua interpreter */
1159 char **argv = malloc(sizeof(char *) * LUA_MAX_ARGS_COUNT);
1161 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? */
1163 lua_getglobal(L, "arg");
1164 /* if arg is a null value, it means we use lua only as a script to init platform
1165 * else it should be a table and then take arg in consideration
1167 if (lua_istable(L, -1)) {
1171 lua_pushinteger(L, argc - 2);
1172 lua_gettable(L, -2);
1173 if (lua_isnil(L, -1)) {
1176 xbt_assert(lua_isstring(L, -1),
1177 "argv[%d] got from lua is no string", argc - 1);
1178 xbt_assert(argc < LUA_MAX_ARGS_COUNT,
1179 "Too many arguments, please increase LUA_MAX_ARGS_COUNT in %s before recompiling SimGrid if you insist on having more than %d args on command line",
1180 __FILE__, LUA_MAX_ARGS_COUNT - 1);
1181 argv[argc - 1] = (char *) luaL_checkstring(L, -1);
1183 XBT_DEBUG("Got command line argument %s from lua", argv[argc - 1]);
1186 argv[argc--] = NULL;
1188 /* Initialize the MSG core */
1189 MSG_global_init(&argc, argv);
1190 XBT_DEBUG("Still %d arguments on command line", argc); // FIXME: update the lua's arg table to reflect the changes from SimGrid
1193 /* Keep the context mechanism informed of our lua world today */
1194 lua_maestro_state = L;
1196 register_c_functions(L);
1202 * Makes the appropriate Simgrid functions available to the Lua world.
1203 * @param L a Lua world
1205 void register_c_functions(lua_State *L) {
1207 /* register the core C functions to lua */
1208 luaL_register(L, "simgrid", simgrid_funcs);
1210 /* register the task methods to lua */
1211 luaL_openlib(L, TASK_MODULE_NAME, Task_methods, 0); // create methods table, add it to the globals
1212 luaL_newmetatable(L, TASK_MODULE_NAME); // create metatable for Task, add it to the Lua registry
1213 luaL_openlib(L, 0, Task_meta, 0); // fill metatable
1214 lua_pushliteral(L, "__index");
1215 lua_pushvalue(L, -3); // dup methods table
1216 lua_rawset(L, -3); // matatable.__index = methods
1217 lua_pushliteral(L, "__metatable");
1218 lua_pushvalue(L, -3); // dup methods table
1219 lua_rawset(L, -3); // hide metatable:metatable.__metatable = methods
1220 lua_pop(L, 1); // drop metatable
1222 /* register the hosts methods to lua */
1223 luaL_openlib(L, HOST_MODULE_NAME, Host_methods, 0);
1224 luaL_newmetatable(L, HOST_MODULE_NAME);
1225 luaL_openlib(L, 0, Host_meta, 0);
1226 lua_pushliteral(L, "__index");
1227 lua_pushvalue(L, -3);
1229 lua_pushliteral(L, "__metatable");
1230 lua_pushvalue(L, -3);
1234 /* register the links methods to lua */
1235 luaL_openlib(L, AS_MODULE_NAME, AS_methods, 0);
1236 luaL_newmetatable(L, AS_MODULE_NAME);
1239 /* register the Tracing functions to lua */
1240 luaL_openlib(L, TRACE_MODULE_NAME, Trace_methods, 0);
1241 luaL_newmetatable(L, TRACE_MODULE_NAME);