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"
19 /* ********************************************************************************* */
20 /* helper functions */
21 /* ********************************************************************************* */
23 static void stackDump (const char *msg, lua_State *L) {
27 int top = lua_gettop(L);
30 p+=sprintf(p,"STACK(top=%d): ",top);
31 /* lua_getglobal(L,"vardump");
32 xbt_assert0(lua_isfunction(L,-1), "Vardump not found");
35 for (i = 1; i <= top; i++) { /* repeat for each level */
37 int t = lua_type(L, i);
40 case LUA_TSTRING: /* strings */
41 p+=sprintf(p,"`%s'", lua_tostring(L, i));
44 case LUA_TBOOLEAN: /* booleans */
45 p+=sprintf(p,lua_toboolean(L, i) ? "true" : "false");
48 case LUA_TNUMBER: /* numbers */
49 p+=sprintf(p,"%g", lua_tonumber(L, i));
53 p+=sprintf(p, "Table");
56 default: /* other values */
58 /* if ((ptr = luaL_checkudata(L,i,TASK_MODULE_NAME))) {
61 p+=printf(p,"%s", lua_typename(L, t));
66 p+=sprintf(p," "); /* put a separator */
68 INFO2("%s%s",msg,buff);
71 /** @brief ensures that a userdata on the stack is a task and returns the pointer inside the userdata */
72 static m_task_t checkTask (lua_State *L,int index) {
74 luaL_checktype(L,index,LUA_TTABLE);
75 lua_getfield(L,index,"__simgrid_task");
76 pi = (m_task_t*)luaL_checkudata(L,-1,TASK_MODULE_NAME);
78 luaL_typerror(L,index,TASK_MODULE_NAME);
81 luaL_error(L,"null Task");
86 /** @brief leaves a new userdata on top of the stack, sets its metatable, and sets the Task pointer inside the userdata */
87 static m_task_t *pushTask (lua_State *L,m_task_t tk) {
90 pi = (m_task_t*)lua_newuserdata(L,sizeof(m_task_t));
93 DEBUG1("push lua task with Name : %s \n",MSG_task_get_name(*pi));
94 luaL_getmetatable(L,TASK_MODULE_NAME);
95 lua_setmetatable(L,-2);
100 /* ********************************************************************************* */
101 /* wrapper functions */
102 /* ********************************************************************************* */
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");
110 m_task_t msg_task = MSG_task_create(name,comp_size,msg_size,NULL);
112 lua_newtable (L); /* create a table, put the userdata on top of it */
114 m_task_t *lua_task = (m_task_t*)lua_newuserdata(L,sizeof(m_task_t));
115 *lua_task = msg_task;
117 luaL_getmetatable(L,TASK_MODULE_NAME);
118 lua_setmetatable(L,-2);
120 lua_setfield (L, -2, "__simgrid_task"); /* put the userdata as field of the table */
121 /* remove the args from the stack */
128 static int Task_get_name(lua_State *L) {
129 m_task_t tk = checkTask(L,-1);
130 lua_pushstring(L,MSG_task_get_name(tk));
134 static int Task_computation_duration(lua_State *L){
135 m_task_t tk = checkTask(L,1);
136 lua_pushnumber(L,MSG_task_get_compute_duration (tk));
140 static int Task_execute(lua_State *L){
141 m_task_t tk = checkTask(L,1);
142 int res = MSG_task_execute(tk);
143 lua_pushnumber(L,res);
147 static int Task_destroy(lua_State *L) {
148 m_task_t tk = checkTask(L,-1);
149 int res = MSG_task_destroy(tk);
150 lua_pushnumber(L,res);
153 static int Task_send(lua_State *L) {
154 stackDump("send ",L);
155 m_task_t tk = checkTask(L,-2);
156 const char *mailbox = luaL_checkstring(L,-1);
157 lua_pop(L,1); // remove the string so that the task is on top of it
158 MSG_task_set_data(tk,L); // Copy my stack into the task, so that the receiver can copy the lua task directly
159 MSG_error_t res = MSG_task_send(tk,mailbox);
160 while (MSG_task_has_data(tk)) // Don't mess up with my stack: the receiver didn't copy the data yet
161 MSG_process_sleep(0); // yield
163 if (res != MSG_OK) switch(res) {
165 ERROR0("MSG_task_send failed : Timeout");
167 case MSG_TRANSFER_FAILURE :
168 ERROR0("MSG_task_send failed : Transfer Failure");
170 case MSG_HOST_FAILURE :
171 ERROR0("MSG_task_send failed : Host Failure ");
174 ERROR0("MSG_task_send failed : Unexpected error , please report this bug");
179 static int Task_recv(lua_State *L) {
181 const char *mailbox = luaL_checkstring(L,-1);
182 MSG_error_t res = MSG_task_receive(&tk,mailbox);
184 lua_State *sender_stack = MSG_task_get_data(tk);
185 lua_xmove(sender_stack,L,1); // copy the data directly from sender's stack
186 MSG_task_set_data(tk,NULL);
188 if(res != MSG_OK) switch(res){
190 ERROR0("MSG_task_receive failed : Timeout");
192 case MSG_TRANSFER_FAILURE :
193 ERROR0("MSG_task_receive failed : Transfer Failure");
195 case MSG_HOST_FAILURE :
196 ERROR0("MSG_task_receive failed : Host Failure ");
199 ERROR0("MSG_task_receive failed : Unexpected error , please report this bug");
206 static const luaL_reg Task_methods[] = {
208 {"name", Task_get_name},
209 {"computation_duration", Task_computation_duration},
210 {"execute", Task_execute},
211 {"destroy", Task_destroy},
216 static int Task_gc(lua_State *L) {
217 m_task_t tk=checkTask(L,1);
218 if (tk) MSG_task_destroy(tk);
219 //printf("GoodBye Task(%p)\n",lua_touserdata(L,1));
223 static int Task_tostring(lua_State *L) {
224 lua_pushfstring(L, "Task :%p",lua_touserdata(L,1));
229 static const luaL_reg Task_meta[] = {
231 {"__tostring", Task_tostring},
236 * Environment related
238 extern lua_State *simgrid_lua_state;
240 static int run_lua_code(int argc,char **argv) {
241 DEBUG1("Run lua code %s",argv[0]);
242 // fprintf(stderr,"Run lua code %s\n", (argv ? argv[0] : "(null)"));
243 lua_State *L = lua_newthread(simgrid_lua_state);
244 int ref = luaL_ref(simgrid_lua_state, LUA_REGISTRYINDEX); // protect the thread from being garbage collected
247 /* Start the co-routine */
248 lua_getglobal(L,argv[0]);
249 xbt_assert1(lua_isfunction(L,-1),
250 "The lua function %s does not seem to exist",argv[0]);
252 // push arguments onto the stack
255 lua_pushstring(L,argv[i]);
257 // Call the function (in resume)
258 xbt_assert2(lua_pcall(L, argc-1, 1, 0) == 0,
259 "error running function `%s': %s",argv[0], lua_tostring(L, -1));
261 /* retrieve result */
262 if (lua_isnumber(L, -1)) {
263 res = lua_tonumber(L, -1);
264 lua_pop(L, 1); /* pop returned value */
268 luaL_unref(simgrid_lua_state,LUA_REGISTRYINDEX,ref );
269 DEBUG1("Execution of lua code %s is over", (argv ? argv[0] : "(null)"));
272 static int launch_application(lua_State *L) {
273 const char * file = luaL_checkstring(L,1);
274 MSG_function_register_default(run_lua_code);
275 MSG_launch_application(file);
278 #include "simix/simix.h" //FIXME: KILLME when debugging on simix internals become useless
279 static int create_environment(lua_State *L) {
280 const char *file = luaL_checkstring(L,1);
281 DEBUG1("Loading environment file %s",file);
282 MSG_create_environment(file);
283 smx_host_t *hosts = SIMIX_host_get_table();
285 for (i=0;i<SIMIX_host_get_number();i++) {
286 DEBUG1("We have an host %s", SIMIX_host_get_name(hosts[i]));
291 static int debug(lua_State *L) {
292 const char *str = luaL_checkstring(L,1);
296 static int info(lua_State *L) {
297 const char *str = luaL_checkstring(L,1);
301 static int run(lua_State *L) {
305 static int clean(lua_State *L) {
309 static const luaL_Reg simgrid_funcs[] = {
310 { "create_environment", create_environment},
311 { "launch_application", launch_application},
317 { "platform", create_environment},
318 { "application", launch_application},
322 /* ********************************************************************************* */
323 /* module management functions */
324 /* ********************************************************************************* */
326 extern const char*xbt_ctx_factory_to_use; /*Hack: let msg load directly the right factory */
328 #define LUA_MAX_ARGS_COUNT 10 /* maximum amount of arguments we can get from lua on command line */
330 int luaopen_simgrid(lua_State* L); // Fuck gcc: we don't need that prototype
331 int luaopen_simgrid(lua_State* L) {
332 //xbt_ctx_factory_to_use = "lua";
334 char **argv=malloc(sizeof(char*)*LUA_MAX_ARGS_COUNT);
336 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? */
337 /* Get the command line arguments from the lua interpreter */
338 lua_getglobal(L,"arg");
339 xbt_assert1(lua_istable(L,-1),"arg parameter is not a table but a %s",lua_typename(L,-1));
343 lua_pushinteger(L,argc-2);
345 if (lua_isnil(L,-1)) {
348 xbt_assert1(lua_isstring(L,-1),"argv[%d] got from lua is no string",argc-1);
349 xbt_assert2(argc<LUA_MAX_ARGS_COUNT,
350 "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",
351 __FILE__,LUA_MAX_ARGS_COUNT-1);
352 argv[argc-1] = (char*)luaL_checkstring(L,-1);
354 DEBUG1("Got command line argument %s from lua",argv[argc-1]);
359 /* Initialize the MSG core */
360 MSG_global_init(&argc,argv);
361 DEBUG1("Still %d arguments on command line",argc); // FIXME: update the lua's arg table to reflect the changes from SimGrid
363 /* register the core C functions to lua */
364 luaL_register(L, "simgrid", simgrid_funcs);
365 /* register the tasks to lua */
366 luaL_openlib(L,TASK_MODULE_NAME,Task_methods,0); //create methods table,add it to the globals
367 luaL_newmetatable(L,TASK_MODULE_NAME); //create metatable for Task,add it to the Lua registry
368 luaL_openlib(L,0,Task_meta,0);// fill metatable
369 lua_pushliteral(L,"__index");
370 lua_pushvalue(L,-3); //dup methods table
371 lua_rawset(L,-3); //matatable.__index = methods
372 lua_pushliteral(L,"__metatable");
373 lua_pushvalue(L,-3); //dup methods table
374 lua_rawset(L,-3); //hide metatable:metatable.__metatable = methods
375 lua_pop(L,1); //drop metatable
377 /* Keep the context mechanism informed of our lua world today */
378 simgrid_lua_state = L;