src/simix/smx_host.c

   1 /* Copyright (c) 2007-2012. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "smx_private.h"
   8 #include "xbt/sysdep.h"
   9 #include "xbt/log.h"
  10 #include "xbt/dict.h"
  11 #include "mc/mc.h"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix,
  14                                 "Logging specific to SIMIX (hosts)");
  15
  16 static void SIMIX_execution_finish(smx_action_t action);
  17
  18 /**
  19  * \brief Internal function to create a SIMIX host.
  20  * \param name name of the host to create
  21  * \param workstation the SURF workstation to encapsulate
  22  * \param data some user data (may be NULL)
  23  */
  24 smx_host_t SIMIX_host_create(const char *name,
  25                                void *workstation, void *data)
  26 {
  27   smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
  28   s_smx_process_t proc;
  29
  30   /* Host structure */
  31   smx_host->data = data;
  32   smx_host->process_list =
  33       xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
  34
  35   /* Update global variables */
  36   xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
  37
  38   return xbt_lib_get_elm_or_null(host_lib, name);
  39 }
  40
  41 void SIMIX_pre_host_on(smx_simcall_t simcall, smx_host_t h)
  42 {
  43   SIMIX_host_on(h);
  44 }
  45
  46 /**
  47  * \brief Start the host if it is off
  48  *
  49  */
  50 void SIMIX_host_on(smx_host_t h)
  51 {
  52   smx_host_priv_t host = (smx_host_priv_t) h;
  53
  54   xbt_assert((host != NULL), "Invalid parameters");
  55
  56   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
  57   ws_model->extension.workstation.set_state(host, SURF_RESOURCE_ON);
  58
  59   SIMIX_host_restart_processes(h);
  60 }
  61
  62 void SIMIX_pre_host_off(smx_simcall_t simcall, smx_host_t h)
  63 {
  64   SIMIX_host_off(h);
  65 }
  66
  67 /**
  68  * \brief Stop the host if it is on
  69  *
  70  */
  71 void SIMIX_host_off(smx_host_t h)
  72 {
  73   smx_host_priv_t host = (smx_host_priv_t) h;
  74
  75   xbt_assert((host != NULL), "Invalid parameters");
  76
  77   /* Clean Simulator data */
  78   if (xbt_swag_size(host->process_list) != 0) {
  79     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
  80     char *tmp;
  81     smx_process_t process = NULL;
  82
  83     xbt_swag_foreach(process, host->process_list) {
  84       tmp = bprintf("%s\n\t%s", msg, process->name);
  85       free(msg);
  86       msg = tmp;
  87     }
  88     SIMIX_display_process_status();
  89     THROWF(arg_error, 0, "%s", msg);
  90   }
  91   xbt_swag_free(host->process_list);
  92
  93   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
  94   ws_model->extension.workstation.set_state(host, SURF_RESOURCE_OFF);
  95 }
  96
  97 /**
  98  * \brief Internal function to destroy a SIMIX host.
  99  *
 100  * \param h the host to destroy (a smx_host_t)
 101  */
 102 void SIMIX_host_destroy(void *h)
 103 {
 104   smx_host_priv_t host = (smx_host_priv_t) h;
 105
 106   xbt_assert((host != NULL), "Invalid parameters");
 107
 108   /* Clean Simulator data */
 109   if (xbt_swag_size(host->process_list) != 0) {
 110     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
 111     char *tmp;
 112     smx_process_t process = NULL;
 113
 114     xbt_swag_foreach(process, host->process_list) {
 115       tmp = bprintf("%s\n\t%s", msg, process->name);
 116       free(msg);
 117       msg = tmp;
 118     }
 119     SIMIX_display_process_status();
 120     THROWF(arg_error, 0, "%s", msg);
 121   }
 122   xbt_dynar_free(&host->auto_restart_processes);
 123   xbt_swag_free(host->process_list);
 124
 125   /* Clean host structure */
 126   free(host);
 127   return;
 128 }
 129
 130 ///**
 131 // * \brief Returns a dict of all hosts.
 132 // *
 133 // * \return List of all hosts (as a #xbt_dict_t)
 134 // */
 135 //xbt_dict_t SIMIX_host_get_dict(void)
 136 //{
 137 //  xbt_dict_t host_dict = xbt_dict_new_homogeneous(NULL);
 138 //  xbt_lib_cursor_t cursor = NULL;
 139 //  char *name = NULL;
 140 //  void **host = NULL;
 141 //
 142 //  xbt_lib_foreach(host_lib, cursor, name, host){
 143 //    if(host[SIMIX_HOST_LEVEL])
 144 //            xbt_dict_set(host_dict,name,host[SIMIX_HOST_LEVEL], NULL);
 145 //  }
 146 //  return host_dict;
 147 //}
 148 smx_host_t SIMIX_pre_host_get_by_name(smx_simcall_t simcall, const char *name){
 149    return SIMIX_host_get_by_name(name);
 150 }
 151 smx_host_t SIMIX_host_get_by_name(const char *name){
 152   xbt_assert(((simix_global != NULL)
 153                && (host_lib != NULL)),
 154               "Environment not set yet");
 155
 156   return xbt_lib_get_elm_or_null(host_lib, name);
 157 }
 158
 159 smx_host_t SIMIX_host_self(void)
 160 {
 161   smx_process_t process = SIMIX_process_self();
 162   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 163 }
 164
 165 const char* SIMIX_pre_host_self_get_name(smx_simcall_t simcall){
 166    return SIMIX_host_self_get_name();
 167 }
 168 /* needs to be public and without simcall because it is called
 169    by exceptions and logging events */
 170 const char* SIMIX_host_self_get_name(void)
 171 {
 172   smx_host_t host = SIMIX_host_self();
 173   if (host == NULL || SIMIX_process_self() == simix_global->maestro_process)
 174     return "";
 175
 176   return SIMIX_host_get_name(host);
 177 }
 178
 179 const char* SIMIX_pre_host_get_name(smx_simcall_t simcall, smx_host_t host){
 180    return SIMIX_host_get_name(host);
 181 }
 182 const char* SIMIX_host_get_name(smx_host_t host){
 183   xbt_assert((host != NULL), "Invalid parameters");
 184
 185   return sg_host_name(host);
 186 }
 187
 188 xbt_dict_t SIMIX_pre_host_get_properties(smx_simcall_t simcall, smx_host_t host){
 189   return SIMIX_host_get_properties(host);
 190 }
 191 xbt_dict_t SIMIX_host_get_properties(smx_host_t host){
 192   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 193
 194   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 195   return ws_model->extension.workstation.get_properties(host);
 196 }
 197
 198 double SIMIX_pre_host_get_speed(smx_simcall_t simcall, smx_host_t host){
 199   return SIMIX_host_get_speed(host);
 200 }
 201 double SIMIX_host_get_speed(smx_host_t host){
 202   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 203
 204   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 205   return ws_model->extension.workstation.get_speed(host, 1.0);
 206 }
 207
 208 int SIMIX_pre_host_get_core(smx_simcall_t simcall, smx_host_t host){
 209   return SIMIX_host_get_core(host);
 210 }
 211 int SIMIX_host_get_core(smx_host_t host){
 212   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 213
 214   return surf_workstation_model->extension.workstation.
 215       get_core(host);
 216 }
 217
 218
 219
 220 double SIMIX_pre_host_get_available_speed(smx_simcall_t simcall, smx_host_t host){
 221   return SIMIX_host_get_available_speed(host);
 222 }
 223 double SIMIX_host_get_available_speed(smx_host_t host){
 224   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 225
 226   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 227   return ws_model->extension.workstation.get_available_speed(host);
 228 }
 229
 230 int SIMIX_pre_host_get_state(smx_simcall_t simcall, smx_host_t host){
 231   return SIMIX_host_get_state(host);
 232 }
 233 int SIMIX_host_get_state(smx_host_t host){
 234   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 235
 236   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 237   return ws_model->extension.workstation.get_state(host);
 238 }
 239
 240 void* SIMIX_pre_host_self_get_data(smx_simcall_t simcall){
 241   return SIMIX_host_self_get_data();
 242 }
 243 void* SIMIX_host_self_get_data(void)
 244 {
 245   smx_host_t self = SIMIX_host_self();
 246   return SIMIX_host_get_data(self);
 247 }
 248
 249 void SIMIX_host_self_set_data(void *data)
 250 {
 251   smx_host_t self = SIMIX_host_self();
 252   SIMIX_host_set_data(self, data);
 253 }
 254
 255 void* SIMIX_pre_host_get_data(smx_simcall_t simcall,smx_host_t host){
 256   return SIMIX_host_get_data(host);
 257 }
 258 void* SIMIX_host_get_data(smx_host_t host){
 259   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 260
 261   return SIMIX_host_priv(host)->data;
 262 }
 263 void _SIMIX_host_free_process_arg(void *);
 264 void _SIMIX_host_free_process_arg(void *data)
 265 {
 266   smx_process_arg_t arg = *(void**)data;
 267   xbt_free(arg->name);
 268   xbt_free(arg);
 269 }
 270 /**
 271  * \brief Add a process to the list of the processes that the host will restart when it comes back
 272  * This function add a process to the list of the processes that will be restarted when the host comes
 273  * back. It is expected that this function is called when the host is down.
 274  * The processes will only be restarted once, meaning that you will have to register the process
 275  * again to restart the process again.
 276  */
 277 void SIMIX_host_add_auto_restart_process(smx_host_t host,
 278                                          const char *name,
 279                                          xbt_main_func_t code,
 280                                          void *data,
 281                                          const char *hostname,
 282                                          double kill_time,
 283                                          int argc, char **argv,
 284                                          xbt_dict_t properties,
 285                                          int auto_restart)
 286 {
 287   if (!SIMIX_host_priv(host)->auto_restart_processes) {
 288     SIMIX_host_priv(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 289   }
 290   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 291   arg->name = xbt_strdup(name);
 292   arg->code = code;
 293   arg->data = data;
 294   arg->hostname = hostname;
 295   arg->kill_time = kill_time;
 296   arg->argc = argc;
 297
 298   arg->argv = xbt_new(char*,argc + 1);
 299
 300   int i;
 301   for (i = 0; i < argc; i++) {
 302     arg->argv[i] = xbt_strdup(argv[i]);
 303   }
 304   arg->argv[argc] = NULL;
 305
 306   arg->properties = properties;
 307   arg->auto_restart = auto_restart;
 308
 309   if( SIMIX_host_get_state(host) == SURF_RESOURCE_OFF
 310       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_name(host))){
 311     xbt_dict_set(watched_hosts_lib,sg_host_name(host),host,NULL);
 312     XBT_DEBUG("Have push host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_name(host));
 313   }
 314   xbt_dynar_push_as(SIMIX_host_priv(host)->auto_restart_processes,smx_process_arg_t,arg);
 315 }
 316 /**
 317  * \brief Restart the list of processes that have been registered to the host
 318  */
 319 void SIMIX_host_restart_processes(smx_host_t host)
 320 {
 321   unsigned int cpt;
 322   smx_process_arg_t arg;
 323   xbt_dynar_foreach(SIMIX_host_priv(host)->auto_restart_processes,cpt,arg) {
 324
 325     smx_process_t process;
 326
 327     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 328     if (simix_global->create_process_function) {
 329       simix_global->create_process_function(&process,
 330                                             arg->argv[0],
 331                                             arg->code,
 332                                             NULL,
 333                                             arg->hostname,
 334                                             arg->kill_time,
 335                                             arg->argc,
 336                                             arg->argv,
 337                                             arg->properties,
 338                                             arg->auto_restart);
 339     }
 340     else {
 341       simcall_process_create(&process,
 342                                             arg->argv[0],
 343                                             arg->code,
 344                                             NULL,
 345                                             arg->hostname,
 346                                             arg->kill_time,
 347                                             arg->argc,
 348                                             arg->argv,
 349                                             arg->properties,
 350                                             arg->auto_restart);
 351
 352     }
 353   }
 354   xbt_dynar_reset(SIMIX_host_priv(host)->auto_restart_processes);
 355 }
 356
 357 void SIMIX_host_autorestart(smx_host_t host)
 358 {
 359   if(simix_global->autorestart)
 360     simix_global->autorestart(host);
 361   else
 362     xbt_die("No function for simix_global->autorestart");
 363 }
 364
 365 void SIMIX_pre_host_set_data(smx_simcall_t simcall, smx_host_t host, void *data) {
 366   SIMIX_host_set_data(host, data);
 367 }
 368 void SIMIX_host_set_data(smx_host_t host, void *data){
 369   xbt_assert((host != NULL), "Invalid parameters");
 370   xbt_assert((SIMIX_host_priv(host)->data == NULL), "Data already set");
 371
 372   SIMIX_host_priv(host)->data = data;
 373 }
 374
 375 smx_action_t SIMIX_pre_host_execute(smx_simcall_t simcall,const char *name,
 376     smx_host_t host, double computation_amount, double priority, double bound){
 377   return SIMIX_host_execute(name, host, computation_amount, priority, bound);
 378 }
 379 smx_action_t SIMIX_host_execute(const char *name,
 380     smx_host_t host, double computation_amount, double priority, double bound){
 381
 382   /* alloc structures and initialize */
 383   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 384   action->type = SIMIX_ACTION_EXECUTE;
 385   action->name = xbt_strdup(name);
 386   action->state = SIMIX_RUNNING;
 387   action->execution.host = host;
 388
 389 #ifdef HAVE_TRACING
 390   action->category = NULL;
 391 #endif
 392
 393   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 394   /* set surf's action */
 395   if (!MC_is_active()) {
 396     action->execution.surf_exec = ws_model->extension.workstation.execute(host, computation_amount);
 397     ws_model->action_data_set(action->execution.surf_exec, action);
 398     ws_model->set_priority(action->execution.surf_exec, priority);
 399     ws_model->set_bound(action->execution.surf_exec, bound);
 400   }
 401
 402   XBT_DEBUG("Create execute action %p", action);
 403
 404   return action;
 405 }
 406
 407 smx_action_t SIMIX_pre_host_parallel_execute(smx_simcall_t simcall, const char *name,
 408     int host_nb, smx_host_t *host_list,
 409     double *computation_amount, double *communication_amount,
 410     double amount, double rate){
 411   return SIMIX_host_parallel_execute(name, host_nb, host_list, computation_amount,
 412                                      communication_amount, amount, rate);
 413 }
 414 smx_action_t SIMIX_host_parallel_execute(const char *name,
 415     int host_nb, smx_host_t *host_list,
 416     double *computation_amount, double *communication_amount,
 417     double amount, double rate){
 418
 419   void **workstation_list = NULL;
 420   int i;
 421
 422   /* alloc structures and initialize */
 423   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 424   action->type = SIMIX_ACTION_PARALLEL_EXECUTE;
 425   action->name = xbt_strdup(name);
 426   action->state = SIMIX_RUNNING;
 427   action->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 428
 429 #ifdef HAVE_TRACING
 430   action->category = NULL;
 431 #endif
 432
 433   /* set surf's action */
 434   workstation_list = xbt_new0(void *, host_nb);
 435   for (i = 0; i < host_nb; i++)
 436     workstation_list[i] = host_list[i];
 437
 438
 439   /* FIXME: what happens if host_list contains VMs and PMs. If
 440    * execute_parallel_task() does not change the state of the model, we can mix
 441    * them. */
 442   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_WKS_LEVEL);
 443   for (i = 1; i < host_nb; i++) {
 444     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_WKS_LEVEL);
 445     if (ws_model_tmp != ws_model) {
 446       XBT_CRITICAL("mixing VMs and PMs is not supported");
 447       DIE_IMPOSSIBLE;
 448     }
 449   }
 450
 451   /* set surf's action */
 452   if (!MC_is_active()) {
 453     action->execution.surf_exec =
 454       ws_model->extension.workstation.
 455       execute_parallel_task(host_nb, workstation_list, computation_amount,
 456                       communication_amount, rate);
 457
 458     ws_model->action_data_set(action->execution.surf_exec, action);
 459   }
 460   XBT_DEBUG("Create parallel execute action %p", action);
 461
 462   return action;
 463 }
 464
 465 static surf_model_t get_ws_model_from_action(smx_action_t action)
 466 {
 467   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 468   smx_host_t host = action->execution.host;
 469   surf_model_t model = surf_resource_model(host, SURF_WKS_LEVEL);
 470
 471   xbt_assert((model == surf_workstation_model) || (model == surf_vm_workstation_model));
 472
 473   return model;
 474 }
 475
 476 void SIMIX_pre_host_execution_destroy(smx_simcall_t simcall, smx_action_t action){
 477   SIMIX_host_execution_destroy(action);
 478 }
 479 void SIMIX_host_execution_destroy(smx_action_t action){
 480   XBT_DEBUG("Destroy action %p", action);
 481
 482   surf_model_t ws_model = get_ws_model_from_action(action);
 483
 484   if (action->execution.surf_exec) {
 485     ws_model->action_unref(action->execution.surf_exec);
 486     action->execution.surf_exec = NULL;
 487   }
 488   xbt_free(action->name);
 489   xbt_mallocator_release(simix_global->action_mallocator, action);
 490 }
 491
 492 void SIMIX_pre_host_execution_cancel(smx_simcall_t simcall, smx_action_t action){
 493   SIMIX_host_execution_cancel(action);
 494 }
 495 void SIMIX_host_execution_cancel(smx_action_t action){
 496   XBT_DEBUG("Cancel action %p", action);
 497
 498   surf_model_t ws_model = get_ws_model_from_action(action);
 499
 500   if (action->execution.surf_exec)
 501     ws_model->action_cancel(action->execution.surf_exec);
 502 }
 503
 504 double SIMIX_pre_host_execution_get_remains(smx_simcall_t simcall, smx_action_t action){
 505   return SIMIX_host_execution_get_remains(action);
 506 }
 507 double SIMIX_host_execution_get_remains(smx_action_t action){
 508   double result = 0.0;
 509   surf_model_t ws_model = get_ws_model_from_action(action);
 510
 511   if (action->state == SIMIX_RUNNING)
 512     result = ws_model->get_remains(action->execution.surf_exec);
 513
 514   return result;
 515 }
 516
 517 e_smx_state_t SIMIX_pre_host_execution_get_state(smx_simcall_t simcall, smx_action_t action){
 518   return SIMIX_host_execution_get_state(action);
 519 }
 520 e_smx_state_t SIMIX_host_execution_get_state(smx_action_t action){
 521   return action->state;
 522 }
 523
 524 void SIMIX_pre_host_execution_set_priority(smx_simcall_t simcall, smx_action_t action,
 525                                         double priority){
 526   SIMIX_host_execution_set_priority(action, priority);
 527 }
 528 void SIMIX_host_execution_set_priority(smx_action_t action, double priority){
 529   surf_model_t ws_model = get_ws_model_from_action(action);
 530
 531   if(action->execution.surf_exec)
 532     ws_model->set_priority(action->execution.surf_exec, priority);
 533 }
 534
 535 void SIMIX_pre_host_execution_set_bound(smx_simcall_t simcall, smx_action_t action,
 536                                         double bound){
 537   SIMIX_host_execution_set_bound(action, bound);
 538 }
 539 void SIMIX_host_execution_set_bound(smx_action_t action, double bound){
 540   surf_model_t ws_model = get_ws_model_from_action(action);
 541
 542   if(action->execution.surf_exec)
 543     ws_model->set_bound(action->execution.surf_exec, bound);
 544 }
 545
 546 void SIMIX_pre_host_execution_wait(smx_simcall_t simcall, smx_action_t action){
 547
 548   XBT_DEBUG("Wait for execution of action %p, state %d", action, (int)action->state);
 549
 550   /* Associate this simcall to the action */
 551   xbt_fifo_push(action->simcalls, simcall);
 552   simcall->issuer->waiting_action = action;
 553
 554   /* set surf's action */
 555   if (MC_is_active()) {
 556     action->state = SIMIX_DONE;
 557     SIMIX_execution_finish(action);
 558     return;
 559   }
 560
 561   /* If the action is already finished then perform the error handling */
 562   if (action->state != SIMIX_RUNNING)
 563     SIMIX_execution_finish(action);
 564 }
 565
 566 void SIMIX_host_execution_suspend(smx_action_t action)
 567 {
 568   surf_model_t ws_model = get_ws_model_from_action(action);
 569
 570   if(action->execution.surf_exec)
 571     ws_model->suspend(action->execution.surf_exec);
 572 }
 573
 574 void SIMIX_host_execution_resume(smx_action_t action)
 575 {
 576   surf_model_t ws_model = get_ws_model_from_action(action);
 577
 578   if(action->execution.surf_exec)
 579     ws_model->resume(action->execution.surf_exec);
 580 }
 581
 582 void SIMIX_execution_finish(smx_action_t action)
 583 {
 584   xbt_fifo_item_t item;
 585   smx_simcall_t simcall;
 586   surf_model_t ws_model = get_ws_model_from_action(action);
 587
 588   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 589
 590     switch (action->state) {
 591
 592       case SIMIX_DONE:
 593         /* do nothing, action done */
 594   XBT_DEBUG("SIMIX_execution_finished: execution successful");
 595         break;
 596
 597       case SIMIX_FAILED:
 598         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_name(simcall->issuer->smx_host));
 599         simcall->issuer->context->iwannadie = 1;
 600         //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 601         break;
 602
 603       case SIMIX_CANCELED:
 604         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 605         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 606         break;
 607
 608       default:
 609         xbt_die("Internal error in SIMIX_execution_finish: unexpected action state %d",
 610             (int)action->state);
 611     }
 612     /* check if the host is down */
 613     if (ws_model->extension.workstation.get_state(simcall->issuer->smx_host) != SURF_RESOURCE_ON) {
 614       simcall->issuer->context->iwannadie = 1;
 615     }
 616
 617     simcall->issuer->waiting_action =    NULL;
 618     simcall_host_execution_wait__set__result(simcall, action->state);
 619     SIMIX_simcall_answer(simcall);
 620   }
 621
 622   /* We no longer need it */
 623   SIMIX_host_execution_destroy(action);
 624 }
 625
 626
 627 void SIMIX_post_host_execute(smx_action_t action)
 628 {
 629   surf_model_t ws_model = get_ws_model_from_action(action);
 630
 631   if (action->type == SIMIX_ACTION_EXECUTE && /* FIMXE: handle resource failure
 632                                                * for parallel tasks too */
 633       ws_model->extension.workstation.get_state(action->execution.host) == SURF_RESOURCE_OFF) {
 634     /* If the host running the action failed, notice it so that the asking
 635      * process can be killed if it runs on that host itself */
 636     action->state = SIMIX_FAILED;
 637   } else if (ws_model->action_state_get(action->execution.surf_exec) == SURF_ACTION_FAILED) {
 638     /* If the host running the action didn't fail, then the action was
 639      * canceled */
 640     action->state = SIMIX_CANCELED;
 641   } else {
 642     action->state = SIMIX_DONE;
 643   }
 644
 645   if (action->execution.surf_exec) {
 646     ws_model->action_unref(action->execution.surf_exec);
 647     action->execution.surf_exec = NULL;
 648   }
 649
 650   /* If there are simcalls associated with the action, then answer them */
 651   if (xbt_fifo_size(action->simcalls)) {
 652     SIMIX_execution_finish(action);
 653   }
 654 }
 655
 656
 657 #ifdef HAVE_TRACING
 658 void SIMIX_pre_set_category(smx_simcall_t simcall, smx_action_t action,
 659                             const char *category){
 660   SIMIX_set_category(action, category);
 661 }
 662 void SIMIX_set_category(smx_action_t action, const char *category)
 663 {
 664   surf_model_t ws_model = get_ws_model_from_action(action);
 665
 666   if (action->state != SIMIX_RUNNING) return;
 667   if (action->type == SIMIX_ACTION_EXECUTE){
 668     ws_model->set_category(action->execution.surf_exec, category);
 669   }else if (action->type == SIMIX_ACTION_COMMUNICATE){
 670     ws_model->set_category(action->comm.surf_comm, category);
 671   }
 672 }
 673 #endif
 674
 675
 676 /**
 677  * \brief Function to get the parameters of the given the SIMIX host.
 678  *
 679  * \param host the host to get_phys_host (a smx_host_t)
 680  * \param param the parameter object space to be overwritten (a ws_params_t)
 681  */
 682 void SIMIX_host_get_params(smx_host_t ind_vm, ws_params_t params)
 683 {
 684   /* jump to ws_get_params(). */
 685   surf_workstation_model->extension.workstation.get_params(ind_vm, params);
 686 }
 687
 688 void SIMIX_pre_host_get_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 689 {
 690   SIMIX_host_get_params(ind_vm, params);
 691   SIMIX_simcall_answer(simcall);
 692 }
 693
 694 void SIMIX_host_set_params(smx_host_t ind_vm, ws_params_t params)
 695 {
 696   /* jump to ws_set_params(). */
 697   surf_workstation_model->extension.workstation.set_params(ind_vm, params);
 698 }
 699
 700 void SIMIX_pre_host_set_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 701 {
 702   SIMIX_host_set_params(ind_vm, params);
 703   SIMIX_simcall_answer(simcall);
 704 }