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. */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua,bindings,"Lua Bindings");
17 #define TASK_MODULE_NAME "simgrid.Task"
18 #define HOST_MODULE_NAME "simgrid.Host"
19 // Surf ( bypass XML )
20 #define LINK_MODULE_NAME "simgrid.Link"
21 #define ROUTE_MODULE_NAME "simgrid.Route"
24 /* ********************************************************************************* */
25 /* helper functions */
26 /* ********************************************************************************* */
28 static void stackDump (const char *msg, lua_State *L) {
32 int top = lua_gettop(L);
35 p+=sprintf(p,"STACK(top=%d): ",top);
37 for (i = 1; i <= top; i++) { /* repeat for each level */
38 int t = lua_type(L, i);
41 case LUA_TSTRING: /* strings */
42 p+=sprintf(p,"`%s'", lua_tostring(L, i));
45 case LUA_TBOOLEAN: /* booleans */
46 p+=sprintf(p,lua_toboolean(L, i) ? "true" : "false");
49 case LUA_TNUMBER: /* numbers */
50 p+=sprintf(p,"%g", lua_tonumber(L, i));
54 p+=sprintf(p, "Table");
57 default: /* other values */
59 /* if ((ptr = luaL_checkudata(L,i,TASK_MODULE_NAME))) {
62 p+=printf(p,"%s", lua_typename(L, t));
67 p+=sprintf(p," "); /* put a separator */
69 INFO2("%s%s",msg,buff);
72 /** @brief ensures that a userdata on the stack is a task and returns the pointer inside the userdata */
73 static m_task_t checkTask (lua_State *L,int index) {
75 luaL_checktype(L,index,LUA_TTABLE);
76 lua_getfield(L,index,"__simgrid_task");
77 pi = (m_task_t*)luaL_checkudata(L,-1,TASK_MODULE_NAME);
79 luaL_typerror(L,index,TASK_MODULE_NAME);
82 luaL_error(L,"null Task");
86 /* ********************************************************************************* */
87 /* wrapper functions */
88 /* ********************************************************************************* */
91 * A task is either something to compute somewhere, or something to exchange between two hosts (or both).
92 * It is defined by a computing amount and a message size.
100 * Construct an new task with the specified processing amount and amount
103 * @param name Task's name
105 * @param computeDuration A value of the processing amount (in flop) needed to process the task.
106 * If 0, then it cannot be executed with the execute() method.
107 * This value has to be >= 0.
109 * @param messageSize A value of amount of data (in bytes) needed to transfert this task.
110 * If 0, then it cannot be transfered with the get() and put() methods.
111 * This value has to be >= 0.
113 static int Task_new(lua_State* L) {
114 const char *name=luaL_checkstring(L,1);
115 int comp_size = luaL_checkint(L,2);
116 int msg_size = luaL_checkint(L,3);
117 INFO0("Creating task");
118 m_task_t msg_task = MSG_task_create(name,comp_size,msg_size,NULL);
119 lua_newtable (L); /* create a table, put the userdata on top of it */
120 m_task_t *lua_task = (m_task_t*)lua_newuserdata(L,sizeof(m_task_t));
121 *lua_task = msg_task;
122 luaL_getmetatable(L,TASK_MODULE_NAME);
123 lua_setmetatable(L,-2);
124 lua_setfield (L, -2, "__simgrid_task"); /* put the userdata as field of the table */
125 /* remove the args from the stack */
132 static int Task_get_name(lua_State *L) {
133 m_task_t tk = checkTask(L,-1);
134 lua_pushstring(L,MSG_task_get_name(tk));
138 static int Task_computation_duration(lua_State *L){
139 m_task_t tk = checkTask(L,-1);
140 lua_pushnumber(L,MSG_task_get_compute_duration (tk));
144 static int Task_execute(lua_State *L){
145 m_task_t tk = checkTask(L,-1);
146 int res = MSG_task_execute(tk);
147 lua_pushnumber(L,res);
151 static int Task_destroy(lua_State *L) {
152 m_task_t tk = checkTask(L,-1);
153 int res = MSG_task_destroy(tk);
154 lua_pushnumber(L,res);
158 static int Task_send(lua_State *L) {
159 //stackDump("send ",L);
160 m_task_t tk = checkTask(L,-2);
161 const char *mailbox = luaL_checkstring(L,-1);
162 lua_pop(L,1); // remove the string so that the task is on top of it
163 MSG_task_set_data(tk,L); // Copy my stack into the task, so that the receiver can copy the lua task directly
164 MSG_error_t res = MSG_task_send(tk,mailbox);
165 while (MSG_task_get_data(tk)!=NULL) // Don't mess up with my stack: the receiver didn't copy the data yet
166 MSG_process_sleep(0); // yield
168 if (res != MSG_OK) switch(res) {
170 ERROR0("MSG_task_send failed : Timeout");
172 case MSG_TRANSFER_FAILURE :
173 ERROR0("MSG_task_send failed : Transfer Failure");
175 case MSG_HOST_FAILURE :
176 ERROR0("MSG_task_send failed : Host Failure ");
179 ERROR0("MSG_task_send failed : Unexpected error , please report this bug");
185 static int Task_recv(lua_State *L) {
187 const char *mailbox = luaL_checkstring(L,-1);
188 MSG_error_t res = MSG_task_receive(&tk,mailbox);
190 lua_State *sender_stack = MSG_task_get_data(tk);
191 lua_xmove(sender_stack,L,1); // copy the data directly from sender's stack
192 MSG_task_set_data(tk,NULL);
194 if(res != MSG_OK) switch(res){
196 ERROR0("MSG_task_receive failed : Timeout");
198 case MSG_TRANSFER_FAILURE :
199 ERROR0("MSG_task_receive failed : Transfer Failure");
201 case MSG_HOST_FAILURE :
202 ERROR0("MSG_task_receive failed : Host Failure ");
205 ERROR0("MSG_task_receive failed : Unexpected error , please report this bug");
212 static const luaL_reg Task_methods[] = {
214 {"name", Task_get_name},
215 {"computation_duration", Task_computation_duration},
216 {"execute", Task_execute},
217 {"destroy", Task_destroy},
222 static int Task_gc(lua_State *L) {
223 m_task_t tk=checkTask(L,-1);
224 if (tk) MSG_task_destroy(tk);
228 static int Task_tostring(lua_State *L) {
229 lua_pushfstring(L, "Task :%p",lua_touserdata(L,1));
233 static const luaL_reg Task_meta[] = {
235 {"__tostring", Task_tostring},
242 static m_host_t checkHost (lua_State *L,int index) {
244 luaL_checktype(L,index,LUA_TTABLE);
245 lua_getfield(L,index,"__simgrid_host");
246 pi = (m_host_t*)luaL_checkudata(L,-1,HOST_MODULE_NAME);
248 luaL_typerror(L,index,HOST_MODULE_NAME);
251 luaL_error(L,"null Host");
256 static int Host_get_by_name(lua_State *L)
258 const char *name=luaL_checkstring(L,1);
259 DEBUG0("Getting Host from name...");
260 m_host_t msg_host = MSG_get_host_by_name(name);
263 luaL_error(L,"null Host : MSG_get_host_by_name failled");
265 lua_newtable (L); /* create a table, put the userdata on top of it */
266 m_host_t *lua_host = (m_host_t*)lua_newuserdata(L,sizeof(m_host_t));
267 *lua_host = msg_host;
268 luaL_getmetatable(L,HOST_MODULE_NAME);
269 lua_setmetatable(L,-2);
270 lua_setfield (L, -2, "__simgrid_host"); /* put the userdata as field of the table */
271 /* remove the args from the stack */
277 static int Host_get_name(lua_State *L) {
278 m_host_t ht = checkHost(L,-1);
279 lua_pushstring(L,MSG_host_get_name(ht));
283 static int Host_number(lua_State *L) {
284 lua_pushnumber(L,MSG_get_host_number());
288 static int Host_at(lua_State *L)
290 int index = luaL_checkinteger(L,1);
291 m_host_t host = MSG_get_host_table()[index-1]; // lua indexing start by 1 (lua[1] <=> C[0])
292 lua_newtable (L); /* create a table, put the userdata on top of it */
293 m_host_t *lua_host = (m_host_t*)lua_newuserdata(L,sizeof(m_host_t));
295 luaL_getmetatable(L,HOST_MODULE_NAME);
296 lua_setmetatable(L,-2);
297 lua_setfield (L, -2, "__simgrid_host"); /* put the userdata as field of the table */
302 /*****************************************************************************************
303 * BYPASS XML SURF Methods *
304 ***************************
305 ***************************
306 ******************************************************************************************/
307 #include "surf/surfxml_parse.h" /* to override surf_parse and bypass the parser */
308 #include "surf/surf_private.h"
309 typedef struct t_host_attr
312 // Mandatory attributes
315 // Optional attributes
317 const char *power_trace;
319 const char *state_trace;
320 //deployment attribute
321 const char* function;
322 xbt_dynar_t args_list;
323 }host_attr,*p_host_attr;
325 typedef struct t_link_attr
330 }link_attr,*p_link_attr;
332 typedef struct t_route_attr
336 xbt_dynar_t links_id;
338 }route_attr,*p_route_attr;
340 //using xbt_dynar_t :
341 static xbt_dynar_t host_list_d ;
342 static xbt_dynar_t link_list_d ;
343 static xbt_dynar_t route_list_d ;
348 /*FIXME : still have to use a dictionary as argument make it possible to
349 consider some arguments as optional and removes the importance of the
352 static void create_host(const char* id,double power_peak,double power_sc,
353 const char* power_tr,int state_init,
354 const char* state_tr)
357 double power_scale = 1.0;
358 tmgr_trace_t power_trace = NULL;
359 e_surf_resource_state_t state_initial;
360 tmgr_trace_t state_trace;
362 power_scale = power_sc;
364 state_initial = SURF_RESOURCE_ON;
366 state_init = SURF_RESOURCE_OFF;
368 power_trace = tmgr_trace_new(power_tr);
370 power_trace = tmgr_trace_new("");
372 state_trace = tmgr_trace_new(state_tr);
374 state_trace = tmgr_trace_new("");
375 current_property_set = xbt_dict_new();
376 surf_host_create_resource(xbt_strdup(id), power_peak, power_scale,
377 power_trace, state_initial, state_trace, current_property_set);
381 static int Host_new(lua_State *L)
384 if(xbt_dynar_is_empty(host_list_d))
385 host_list_d = xbt_dynar_new(sizeof(p_host_attr), &xbt_free_ref);
389 const char *power_trace;
390 const char *state_trace;
391 double power,power_scale;
393 //get values from the table passed as argument
394 if (lua_istable(L,-1)) {
397 lua_pushstring(L,"id");
398 lua_gettable(L, -2 );
399 id = lua_tostring(L,-1);
403 lua_pushstring(L,"power");
404 lua_gettable(L, -2 );
405 power = lua_tonumber(L,-1);
409 lua_pushstring(L,"power_scale");
410 lua_gettable(L, -2 );
411 power_scale = lua_tonumber(L,-1);
415 lua_pushstring(L,"power_trace");
416 lua_gettable(L, -2 );
417 power_trace = lua_tostring(L,-1);
421 lua_pushstring(L,"state_initial");
422 lua_gettable(L, -2 );
423 state_initial = lua_tonumber(L,-1);
427 lua_pushstring(L,"state_trace");
428 lua_gettable(L, -2 );
429 state_trace = lua_tostring(L,-1);
433 ERROR0("Bad Arguments to create host, Should be a table with named arguments");
437 host = malloc(sizeof(host_attr));
439 host->power_peak = power;
440 host->power_scale = power_scale;
441 host->power_trace = power_trace;
442 host->state_initial = state_initial;
443 host->state_trace = state_trace;
444 host->function = NULL;
445 xbt_dynar_push(host_list_d, &host);
452 static int Link_new(lua_State *L) // (id,bandwidth,latency)
454 if(xbt_dynar_is_empty(link_list_d))
455 link_list_d = xbt_dynar_new(sizeof(p_link_attr), &xbt_free_ref);
458 double bandwidth,latency;
459 //get values from the table passed as argument
460 if (lua_istable(L,-1)) {
462 lua_pushstring(L,"id");
463 lua_gettable(L, -2 );
464 id = lua_tostring(L,-1);
467 // get bandwidth value
468 lua_pushstring(L,"bandwidth");
469 lua_gettable(L, -2 );
470 bandwidth = lua_tonumber(L,-1);
474 lua_pushstring(L,"latency");
475 lua_gettable(L, -2 );
476 latency = lua_tonumber(L,-1);
480 ERROR0("Bad Arguments to create link, Should be a table with named arguments");
484 p_link_attr link = malloc(sizeof(link_attr));
486 link->bandwidth = bandwidth;
487 link->latency = latency;
488 xbt_dynar_push(link_list_d,&link);
492 static int Route_new(lua_State *L) // (src_id,dest_id,links_number,link_table)
494 if(xbt_dynar_is_empty(route_list_d))
495 route_list_d = xbt_dynar_new(sizeof(p_route_attr), &xbt_free_ref);
497 const char * link_id;
498 p_route_attr route = malloc(sizeof(route_attr));
499 route->src_id = luaL_checkstring(L,1);
500 route->dest_id = luaL_checkstring(L,2);
501 route->links_id = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
503 while (lua_next(L,3) != 0) {
504 link_id = lua_tostring(L, -1);
505 xbt_dynar_push(route->links_id, &link_id);
506 DEBUG2("index = %f , Link_id = %s \n",lua_tonumber(L, -2),lua_tostring(L, -1));
511 //add route to platform's route list
512 xbt_dynar_push(route_list_d,&route);
516 static int Host_set_function(lua_State *L) //(host,function,nb_args,list_args)
518 // look for the index of host in host_list
519 const char *host_id = luaL_checkstring(L,1);
520 const char* argument;
524 xbt_dynar_foreach(host_list_d,i,p_host)
526 if(p_host->id == host_id)
528 p_host->function = luaL_checkstring(L,2);
529 p_host->args_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
530 // fill the args list
533 while (lua_next(L,3) != 0) {
534 argument = lua_tostring(L, -1);
535 xbt_dynar_push(p_host->args_list, &argument);
536 DEBUG2("index = %f , Arg_id = %s \n",lua_tonumber(L, -2),lua_tostring(L, -1));
544 ERROR1("Host : %s Not Fount !!",host_id);
549 * surf parse bypass platform
551 static int surf_parse_bypass_platform()
559 p_route_attr p_route;
561 static int AX_ptr = 0;
562 static int surfxml_bufferstack_size = 2048;
564 /* FIXME allocating memory for the buffer, I think 2kB should be enough */
565 surfxml_bufferstack = xbt_new0(char, surfxml_bufferstack_size);
567 SURFXML_BUFFER_SET(platform_version, "2");
569 SURFXML_START_TAG(platform);
573 xbt_dynar_foreach(host_list_d,i,p_host)
578 create_host(p_host->id,p_host->power,p_host->power_scale,p_host->power_trace,
579 p_host->state_initial,p_host->state_trace);
582 SURFXML_BUFFER_SET(host_id,p_host->id);
583 sprintf(buffer,"%f",p_host->power_peak);
584 SURFXML_BUFFER_SET(host_power,buffer);
585 SURFXML_BUFFER_SET(host_availability, "1.0");
586 SURFXML_BUFFER_SET(host_availability_file, "");
587 A_surfxml_host_state = A_surfxml_host_state_ON;
588 SURFXML_BUFFER_SET(host_state_file, "");
589 SURFXML_BUFFER_SET(host_interference_send, "1.0");
590 SURFXML_BUFFER_SET(host_interference_recv, "1.0");
591 SURFXML_BUFFER_SET(host_interference_send_recv, "1.0");
592 SURFXML_BUFFER_SET(host_max_outgoing_rate, "-1.0");
593 SURFXML_START_TAG(host);
594 SURFXML_END_TAG(host);
599 INFO0("Start Adding Links");
600 xbt_dynar_foreach(link_list_d,i,p_link)
604 INFO0("Bypass_Network");
605 surf_link_create_resouce((char*)p_link->id,p_link->bandwidth,p_link->latency);
608 SURFXML_BUFFER_SET(link_id,p_link->id);
609 sprintf(buffer,"%f",p_link->bandwidth);
610 SURFXML_BUFFER_SET(link_bandwidth,buffer);
611 SURFXML_BUFFER_SET(link_bandwidth_file, "");
612 sprintf(buffer,"%f",p_link->latency);
613 SURFXML_BUFFER_SET(link_latency,buffer);
614 SURFXML_BUFFER_SET(link_latency_file, "");
615 A_surfxml_link_state = A_surfxml_link_state_ON;
616 SURFXML_BUFFER_SET(link_state_file, "");
617 A_surfxml_link_sharing_policy = A_surfxml_link_sharing_policy_SHARED;
618 SURFXML_START_TAG(link);
619 SURFXML_END_TAG(link);
624 INFO0("Start Adding routes");
625 xbt_dynar_foreach(route_list_d,i,p_route)
629 SURFXML_BUFFER_SET(route_src,p_route->src_id);
630 SURFXML_BUFFER_SET(route_dst,p_route->dest_id);
631 SURFXML_BUFFER_SET(route_impact_on_src, "0.0");
632 SURFXML_BUFFER_SET(route_impact_on_dst, "0.0");
633 SURFXML_BUFFER_SET(route_impact_on_src_with_other_recv, "0.0");
634 SURFXML_BUFFER_SET(route_impact_on_dst_with_other_send, "0.0");
635 SURFXML_START_TAG(route);
637 xbt_dynar_foreach(p_route->links_id,j,link_id)
639 SURFXML_BUFFER_SET(link_c_ctn_id,link_id);
640 SURFXML_START_TAG(link_c_ctn);
641 SURFXML_END_TAG(link_c_ctn);
643 surf_add_route_element(link_id);
647 SURFXML_END_TAG(route);
652 SURFXML_END_TAG(platform);
655 free(surfxml_bufferstack);
656 return 0; // must return 0 ?!!
660 * surf parse bypass application
662 static int surf_parse_bypass_application()
668 static int surfxml_bufferstack_size = 2048;
669 /* FIXME ( should be manual )allocating memory to the buffer, I think 2MB should be enough */
670 surfxml_bufferstack = xbt_new0(char, surfxml_bufferstack_size);
672 SURFXML_BUFFER_SET(platform_version, "2");
673 SURFXML_START_TAG(platform);
675 xbt_dynar_foreach(host_list_d,i,p_host)
679 SURFXML_BUFFER_SET(process_host, p_host->id);
680 SURFXML_BUFFER_SET(process_function, p_host->function);
681 SURFXML_BUFFER_SET(process_start_time, "-1.0");
682 SURFXML_BUFFER_SET(process_kill_time, "-1.0");
683 SURFXML_START_TAG(process);
685 xbt_dynar_foreach(p_host->args_list,j,arg)
687 SURFXML_BUFFER_SET(argument_value,arg);
688 SURFXML_START_TAG(argument);
689 SURFXML_END_TAG(argument);
691 SURFXML_END_TAG(process);
695 SURFXML_END_TAG(platform);
696 free(surfxml_bufferstack);
700 //***********Register Methods *******************************************//
704 static const luaL_reg Host_methods[] = {
705 {"getByName", Host_get_by_name},
706 {"name", Host_get_name},
707 {"number", Host_number},
709 // Bypass XML Methods
711 {"setFunction", Host_set_function},
715 static int Host_gc(lua_State *L)
717 m_host_t ht = checkHost(L,-1);
722 static int Host_tostring(lua_State *L)
724 lua_pushfstring(L,"Host :%p",lua_touserdata(L,1));
728 static const luaL_reg Host_meta[] = {
730 {"__tostring", Host_tostring},
737 static const luaL_reg Link_methods[] = {
744 static const luaL_reg Route_methods[] ={
750 * Environment related
753 extern lua_State *simgrid_lua_state;
755 static int run_lua_code(int argc,char **argv) {
756 DEBUG1("Run lua code %s",argv[0]);
757 lua_State *L = lua_newthread(simgrid_lua_state);
758 int ref = luaL_ref(simgrid_lua_state, LUA_REGISTRYINDEX); // protect the thread from being garbage collected
761 /* Start the co-routine */
762 lua_getglobal(L,argv[0]);
763 xbt_assert1(lua_isfunction(L,-1),
764 "The lua function %s does not seem to exist",argv[0]);
766 // push arguments onto the stack
769 lua_pushstring(L,argv[i]);
771 // Call the function (in resume)
772 xbt_assert2(lua_pcall(L, argc-1, 1, 0) == 0,
773 "error running function `%s': %s",argv[0], lua_tostring(L, -1));
775 /* retrieve result */
776 if (lua_isnumber(L, -1)) {
777 res = lua_tonumber(L, -1);
778 lua_pop(L, 1); /* pop returned value */
782 luaL_unref(simgrid_lua_state,LUA_REGISTRYINDEX,ref );
783 DEBUG1("Execution of lua code %s is over", (argv ? argv[0] : "(null)"));
786 static int launch_application(lua_State *L) {
787 const char * file = luaL_checkstring(L,1);
788 MSG_function_register_default(run_lua_code);
789 MSG_launch_application(file);
792 #include "simix/simix.h" //FIXME: KILLME when debugging on simix internals become useless
793 static int create_environment(lua_State *L) {
794 const char *file = luaL_checkstring(L,1);
795 DEBUG1("Loading environment file %s",file);
796 MSG_create_environment(file);
797 smx_host_t *hosts = SIMIX_host_get_table();
799 for (i=0;i<SIMIX_host_get_number();i++) {
800 DEBUG1("We have an host %s", SIMIX_host_get_name(hosts[i]));
806 static int debug(lua_State *L) {
807 const char *str = luaL_checkstring(L,1);
811 static int info(lua_State *L) {
812 const char *str = luaL_checkstring(L,1);
816 static int run(lua_State *L) {
820 static int clean(lua_State *L) {
828 static int register_platform(lua_State *L)
830 /* Tell Simgrid we dont wanna use its parser*/
831 surf_parse = surf_parse_bypass_platform;
832 MSG_create_environment(NULL);
836 static int register_application(lua_State *L)
838 MSG_function_register_default(run_lua_code);
839 surf_parse = surf_parse_bypass_application;
840 MSG_launch_application(NULL);
844 static const luaL_Reg simgrid_funcs[] = {
845 { "create_environment", create_environment},
846 { "launch_application", launch_application},
852 { "platform", create_environment},
853 { "application", launch_application},
854 /* methods to bypass XML parser*/
855 { "register_platform",register_platform},
856 { "register_application",register_application},
860 /* ********************************************************************************* */
861 /* module management functions */
862 /* ********************************************************************************* */
864 extern const char*xbt_ctx_factory_to_use; /*Hack: let msg load directly the right factory */
866 #define LUA_MAX_ARGS_COUNT 10 /* maximum amount of arguments we can get from lua on command line */
868 int luaopen_simgrid(lua_State* L); // Fuck gcc: we don't need that prototype
869 int luaopen_simgrid(lua_State* L) {
870 //xbt_ctx_factory_to_use = "lua";
872 char **argv=malloc(sizeof(char*)*LUA_MAX_ARGS_COUNT);
874 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? */
875 /* Get the command line arguments from the lua interpreter */
876 lua_getglobal(L,"arg");
877 xbt_assert1(lua_istable(L,-1),"arg parameter is not a table but a %s",lua_typename(L,-1));
881 lua_pushinteger(L,argc-2);
883 if (lua_isnil(L,-1)) {
886 xbt_assert1(lua_isstring(L,-1),"argv[%d] got from lua is no string",argc-1);
887 xbt_assert2(argc<LUA_MAX_ARGS_COUNT,
888 "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",
889 __FILE__,LUA_MAX_ARGS_COUNT-1);
890 argv[argc-1] = (char*)luaL_checkstring(L,-1);
892 DEBUG1("Got command line argument %s from lua",argv[argc-1]);
897 /* Initialize the MSG core */
898 MSG_global_init(&argc,argv);
899 DEBUG1("Still %d arguments on command line",argc); // FIXME: update the lua's arg table to reflect the changes from SimGrid
901 /* register the core C functions to lua */
902 luaL_register(L, "simgrid", simgrid_funcs);
903 /* register the task methods to lua */
904 luaL_openlib(L,TASK_MODULE_NAME,Task_methods,0); //create methods table,add it to the globals
905 luaL_newmetatable(L,TASK_MODULE_NAME); //create metatable for Task,add it to the Lua registry
906 luaL_openlib(L,0,Task_meta,0);// fill metatable
907 lua_pushliteral(L,"__index");
908 lua_pushvalue(L,-3); //dup methods table
909 lua_rawset(L,-3); //matatable.__index = methods
910 lua_pushliteral(L,"__metatable");
911 lua_pushvalue(L,-3); //dup methods table
912 lua_rawset(L,-3); //hide metatable:metatable.__metatable = methods
913 lua_pop(L,1); //drop metatable
915 /* register the hosts methods to lua*/
916 luaL_openlib(L,HOST_MODULE_NAME,Host_methods,0);
917 luaL_newmetatable(L,HOST_MODULE_NAME);
918 luaL_openlib(L,0,Host_meta,0);
919 lua_pushliteral(L,"__index");
922 lua_pushliteral(L,"__metatable");
927 /* register the links methods to lua*/
928 luaL_openlib(L,LINK_MODULE_NAME,Link_methods,0);
929 luaL_newmetatable(L,LINK_MODULE_NAME);
932 /*register the routes methods to lua*/
933 luaL_openlib(L,ROUTE_MODULE_NAME,Route_methods,0);
934 luaL_newmetatable(L,LINK_MODULE_NAME);
937 /* Keep the context mechanism informed of our lua world today */
938 simgrid_lua_state = L;