1 /* SimGrid Lua bindings */
3 /* Copyright (c) 2010, the SimGrid team. All right reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua,bindings,"Lua Bindings");
17 #define TASK_MODULE_NAME "simgrid.Task"
18 #define HOST_MODULE_NAME "simgrid.Host"
20 /* ********************************************************************************* */
21 /* helper functions */
22 /* ********************************************************************************* */
24 static void stackDump (const char *msg, lua_State *L) {
28 int top = lua_gettop(L);
31 p+=sprintf(p,"STACK(top=%d): ",top);
33 for (i = 1; i <= top; i++) { /* repeat for each level */
35 int t = lua_type(L, i);
38 case LUA_TSTRING: /* strings */
39 p+=sprintf(p,"`%s'", lua_tostring(L, i));
42 case LUA_TBOOLEAN: /* booleans */
43 p+=sprintf(p,lua_toboolean(L, i) ? "true" : "false");
46 case LUA_TNUMBER: /* numbers */
47 p+=sprintf(p,"%g", lua_tonumber(L, i));
51 p+=sprintf(p, "Table");
54 default: /* other values */
56 /* if ((ptr = luaL_checkudata(L,i,TASK_MODULE_NAME))) {
59 p+=printf(p,"%s", lua_typename(L, t));
64 p+=sprintf(p," "); /* put a separator */
66 INFO2("%s%s",msg,buff);
69 /** @brief ensures that a userdata on the stack is a task and returns the pointer inside the userdata */
70 static m_task_t checkTask (lua_State *L,int index) {
72 luaL_checktype(L,index,LUA_TTABLE);
73 lua_getfield(L,index,"__simgrid_task");
74 pi = (m_task_t*)luaL_checkudata(L,-1,TASK_MODULE_NAME);
76 luaL_typerror(L,index,TASK_MODULE_NAME);
79 luaL_error(L,"null Task");
84 /** @brief leaves a new userdata on top of the stack, sets its metatable, and sets the Task pointer inside the userdata */
86 /*static m_task_t *pushTask (lua_State *L,m_task_t tk) {
88 pi = (m_task_t*)lua_newuserdata(L,sizeof(m_task_t));
90 DEBUG1("push lua task with Name : %s \n",MSG_task_get_name(*pi));
91 luaL_getmetatable(L,TASK_MODULE_NAME);
92 lua_setmetatable(L,-2);
96 /* ********************************************************************************* */
97 /* wrapper functions */
98 /* ********************************************************************************* */
104 static int Task_new(lua_State* L) {
105 const char *name=luaL_checkstring(L,1);
106 int comp_size = luaL_checkint(L,2);
107 int msg_size = luaL_checkint(L,3);
108 INFO0("Creating task");
109 m_task_t msg_task = MSG_task_create(name,comp_size,msg_size,NULL);
110 lua_newtable (L); /* create a table, put the userdata on top of it */
111 m_task_t *lua_task = (m_task_t*)lua_newuserdata(L,sizeof(m_task_t));
112 *lua_task = msg_task;
113 luaL_getmetatable(L,TASK_MODULE_NAME);
114 lua_setmetatable(L,-2);
115 lua_setfield (L, -2, "__simgrid_task"); /* put the userdata as field of the table */
116 /* remove the args from the stack */
123 static int Task_get_name(lua_State *L) {
124 m_task_t tk = checkTask(L,-1);
125 lua_pushstring(L,MSG_task_get_name(tk));
129 static int Task_computation_duration(lua_State *L){
130 m_task_t tk = checkTask(L,-1);
131 lua_pushnumber(L,MSG_task_get_compute_duration (tk));
135 static int Task_execute(lua_State *L){
136 m_task_t tk = checkTask(L,-1);
137 int res = MSG_task_execute(tk);
138 lua_pushnumber(L,res);
142 static int Task_destroy(lua_State *L) {
143 m_task_t tk = checkTask(L,-1);
144 int res = MSG_task_destroy(tk);
145 lua_pushnumber(L,res);
148 static int Task_send(lua_State *L) {
149 //stackDump("send ",L);
150 m_task_t tk = checkTask(L,-2);
151 const char *mailbox = luaL_checkstring(L,-1);
152 lua_pop(L,1); // remove the string so that the task is on top of it
153 MSG_task_set_data(tk,L); // Copy my stack into the task, so that the receiver can copy the lua task directly
154 MSG_error_t res = MSG_task_send(tk,mailbox);
155 while (MSG_task_get_data(tk)!=NULL) // Don't mess up with my stack: the receiver didn't copy the data yet
156 MSG_process_sleep(0); // yield
158 if (res != MSG_OK) switch(res) {
160 ERROR0("MSG_task_send failed : Timeout");
162 case MSG_TRANSFER_FAILURE :
163 ERROR0("MSG_task_send failed : Transfer Failure");
165 case MSG_HOST_FAILURE :
166 ERROR0("MSG_task_send failed : Host Failure ");
169 ERROR0("MSG_task_send failed : Unexpected error , please report this bug");
175 static int Task_recv(lua_State *L) {
177 const char *mailbox = luaL_checkstring(L,-1);
178 MSG_error_t res = MSG_task_receive(&tk,mailbox);
180 lua_State *sender_stack = MSG_task_get_data(tk);
181 lua_xmove(sender_stack,L,1); // copy the data directly from sender's stack
182 MSG_task_set_data(tk,NULL);
184 if(res != MSG_OK) switch(res){
186 ERROR0("MSG_task_receive failed : Timeout");
188 case MSG_TRANSFER_FAILURE :
189 ERROR0("MSG_task_receive failed : Transfer Failure");
191 case MSG_HOST_FAILURE :
192 ERROR0("MSG_task_receive failed : Host Failure ");
195 ERROR0("MSG_task_receive failed : Unexpected error , please report this bug");
202 static const luaL_reg Task_methods[] = {
204 {"name", Task_get_name},
205 {"computation_duration", Task_computation_duration},
206 {"execute", Task_execute},
207 {"destroy", Task_destroy},
212 static int Task_gc(lua_State *L) {
213 m_task_t tk=checkTask(L,-1);
214 if (tk) MSG_task_destroy(tk);
218 static int Task_tostring(lua_State *L) {
219 lua_pushfstring(L, "Task :%p",lua_touserdata(L,1));
223 static const luaL_reg Task_meta[] = {
225 {"__tostring", Task_tostring},
232 static m_host_t checkHost (lua_State *L,int index) {
234 luaL_checktype(L,index,LUA_TTABLE);
235 lua_getfield(L,index,"__simgrid_host");
236 pi = (m_host_t*)luaL_checkudata(L,-1,HOST_MODULE_NAME);
238 luaL_typerror(L,index,HOST_MODULE_NAME);
241 luaL_error(L,"null Host");
247 static int Host_get_by_name(lua_State *L)
249 const char *name=luaL_checkstring(L,1);
250 DEBUG0("Getting Host from name...");
251 m_host_t msg_host = MSG_get_host_by_name(name);
254 luaL_error(L,"null Host : MSG_get_host_by_name failled");
256 lua_newtable (L); /* create a table, put the userdata on top of it */
257 m_host_t *lua_host = (m_host_t*)lua_newuserdata(L,sizeof(m_host_t));
258 *lua_host = msg_host;
259 luaL_getmetatable(L,HOST_MODULE_NAME);
260 lua_setmetatable(L,-2);
261 lua_setfield (L, -2, "__simgrid_host"); /* put the userdata as field of the table */
262 /* remove the args from the stack */
268 static int Host_get_name(lua_State *L) {
269 m_host_t ht = checkHost(L,-1);
270 lua_pushstring(L,MSG_host_get_name(ht));
274 static int Host_number(lua_State *L) {
275 lua_pushnumber(L,MSG_get_host_number());
280 static const luaL_reg Host_methods[] = {
281 {"getByName", Host_get_by_name},
282 {"name", Host_get_name},
283 {"number", Host_number},
287 static int Host_gc(lua_State *L)
289 m_host_t ht = checkHost(L,-1);
294 static int Host_tostring(lua_State *L)
296 lua_pushfstring(L,"Host :%p",lua_touserdata(L,1));
300 static const luaL_reg Host_meta[] = {
302 {"__tostring", Host_tostring},
307 * Environment related
309 extern lua_State *simgrid_lua_state;
311 static int run_lua_code(int argc,char **argv) {
312 DEBUG1("Run lua code %s",argv[0]);
313 lua_State *L = lua_newthread(simgrid_lua_state);
314 int ref = luaL_ref(simgrid_lua_state, LUA_REGISTRYINDEX); // protect the thread from being garbage collected
317 /* Start the co-routine */
318 lua_getglobal(L,argv[0]);
319 xbt_assert1(lua_isfunction(L,-1),
320 "The lua function %s does not seem to exist",argv[0]);
322 // push arguments onto the stack
325 lua_pushstring(L,argv[i]);
327 // Call the function (in resume)
328 xbt_assert2(lua_pcall(L, argc-1, 1, 0) == 0,
329 "error running function `%s': %s",argv[0], lua_tostring(L, -1));
331 /* retrieve result */
332 if (lua_isnumber(L, -1)) {
333 res = lua_tonumber(L, -1);
334 lua_pop(L, 1); /* pop returned value */
338 luaL_unref(simgrid_lua_state,LUA_REGISTRYINDEX,ref );
339 DEBUG1("Execution of lua code %s is over", (argv ? argv[0] : "(null)"));
342 static int launch_application(lua_State *L) {
343 const char * file = luaL_checkstring(L,1);
344 MSG_function_register_default(run_lua_code);
345 MSG_launch_application(file);
348 #include "simix/simix.h" //FIXME: KILLME when debugging on simix internals become useless
349 static int create_environment(lua_State *L) {
350 const char *file = luaL_checkstring(L,1);
351 DEBUG1("Loading environment file %s",file);
352 MSG_create_environment(file);
353 smx_host_t *hosts = SIMIX_host_get_table();
355 for (i=0;i<SIMIX_host_get_number();i++) {
356 DEBUG1("We have an host %s", SIMIX_host_get_name(hosts[i]));
361 static int debug(lua_State *L) {
362 const char *str = luaL_checkstring(L,1);
366 static int info(lua_State *L) {
367 const char *str = luaL_checkstring(L,1);
371 static int run(lua_State *L) {
375 static int clean(lua_State *L) {
379 static const luaL_Reg simgrid_funcs[] = {
380 { "create_environment", create_environment},
381 { "launch_application", launch_application},
387 { "platform", create_environment},
388 { "application", launch_application},
392 /* ********************************************************************************* */
393 /* module management functions */
394 /* ********************************************************************************* */
396 extern const char*xbt_ctx_factory_to_use; /*Hack: let msg load directly the right factory */
398 #define LUA_MAX_ARGS_COUNT 10 /* maximum amount of arguments we can get from lua on command line */
400 int luaopen_simgrid(lua_State* L); // Fuck gcc: we don't need that prototype
401 int luaopen_simgrid(lua_State* L) {
402 //xbt_ctx_factory_to_use = "lua";
404 char **argv=malloc(sizeof(char*)*LUA_MAX_ARGS_COUNT);
406 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? */
407 /* Get the command line arguments from the lua interpreter */
408 lua_getglobal(L,"arg");
409 xbt_assert1(lua_istable(L,-1),"arg parameter is not a table but a %s",lua_typename(L,-1));
413 lua_pushinteger(L,argc-2);
415 if (lua_isnil(L,-1)) {
418 xbt_assert1(lua_isstring(L,-1),"argv[%d] got from lua is no string",argc-1);
419 xbt_assert2(argc<LUA_MAX_ARGS_COUNT,
420 "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",
421 __FILE__,LUA_MAX_ARGS_COUNT-1);
422 argv[argc-1] = (char*)luaL_checkstring(L,-1);
424 DEBUG1("Got command line argument %s from lua",argv[argc-1]);
429 /* Initialize the MSG core */
430 MSG_global_init(&argc,argv);
431 DEBUG1("Still %d arguments on command line",argc); // FIXME: update the lua's arg table to reflect the changes from SimGrid
433 /* register the core C functions to lua */
434 luaL_register(L, "simgrid", simgrid_funcs);
435 /* register the task methods to lua */
436 luaL_openlib(L,TASK_MODULE_NAME,Task_methods,0); //create methods table,add it to the globals
437 luaL_newmetatable(L,TASK_MODULE_NAME); //create metatable for Task,add it to the Lua registry
438 luaL_openlib(L,0,Task_meta,0);// fill metatable
439 lua_pushliteral(L,"__index");
440 lua_pushvalue(L,-3); //dup methods table
441 lua_rawset(L,-3); //matatable.__index = methods
442 lua_pushliteral(L,"__metatable");
443 lua_pushvalue(L,-3); //dup methods table
444 lua_rawset(L,-3); //hide metatable:metatable.__metatable = methods
445 lua_pop(L,1); //drop metatable
447 /* register the hosts methods to lua*/
448 luaL_openlib(L,HOST_MODULE_NAME,Host_methods,0);
449 luaL_newmetatable(L,HOST_MODULE_NAME);
450 luaL_openlib(L,0,Host_meta,0);
451 lua_pushliteral(L,"__index");
454 lua_pushliteral(L,"__metatable");
459 /* Keep the context mechanism informed of our lua world today */
460 simgrid_lua_state = L;