src/simix/smx_process.c

   1 /* Copyright (c) 2007-2014. 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_process, simix,
  14                                 "Logging specific to SIMIX (process)");
  15
  16 unsigned long simix_process_maxpid = 0;
  17
  18 /**
  19  * \brief Returns the current agent.
  20  *
  21  * This functions returns the currently running SIMIX process.
  22  *
  23  * \return The SIMIX process
  24  */
  25 XBT_INLINE smx_process_t SIMIX_process_self(void)
  26 {
  27   smx_context_t self_context = SIMIX_context_self();
  28
  29   return self_context ? SIMIX_context_get_process(self_context) : NULL;
  30 }
  31
  32 /**
  33  * \brief Returns whether a process has pending asynchronous communications.
  34  * \return true if there are asynchronous communications in this process
  35  */
  36 int SIMIX_process_has_pending_comms(smx_process_t process) {
  37
  38   return xbt_fifo_size(process->comms) > 0;
  39 }
  40
  41 void SIMIX_pre_process_cleanup(smx_simcall_t simcall, smx_process_t process) {
  42   SIMIX_process_cleanup(process);
  43 }
  44 /**
  45  * \brief Moves a process to the list of processes to destroy.
  46  */
  47 void SIMIX_process_cleanup(smx_process_t process)
  48 {
  49   XBT_DEBUG("Cleanup process %s (%p), waiting action %p",
  50       process->name, process, process->waiting_action);
  51
  52   /* cancel non-blocking communications */
  53   smx_action_t action;
  54   while ((action = xbt_fifo_pop(process->comms))) {
  55
  56     /* make sure no one will finish the comm after this process is destroyed,
  57      * because src_proc or dst_proc would be an invalid pointer */
  58     SIMIX_comm_cancel(action);
  59
  60     if (action->comm.src_proc == process) {
  61       XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
  62           action, action->comm.detached, (int)action->state, action->comm.src_proc, action->comm.dst_proc);
  63       action->comm.src_proc = NULL;
  64
  65       if (action->comm.detached) {
  66          if (action->comm.refcount == 0) {
  67            XBT_DEBUG("Increase the refcount before destroying it since it's detached");
  68            /* I'm not supposed to destroy a detached comm from the sender side,
  69             * unless there is no receiver matching the rdv */
  70            action->comm.refcount++;
  71            SIMIX_comm_destroy(action);
  72          }
  73          else {
  74            XBT_DEBUG("Don't destroy it since its refcount is %d", action->comm.refcount);
  75          }
  76       } else {
  77         SIMIX_comm_destroy(action);
  78       }
  79     }
  80     else if (action->comm.dst_proc == process){
  81       XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
  82           action, (int)action->state, action->comm.src_proc, action->comm.dst_proc);
  83       action->comm.dst_proc = NULL;
  84
  85       if (action->comm.detached && action->comm.refcount == 1
  86           && action->comm.src_proc != NULL) {
  87         /* the comm will be freed right now, remove it from the sender */
  88         xbt_fifo_remove(action->comm.src_proc->comms, action);
  89       }
  90       SIMIX_comm_destroy(action);
  91     }
  92     else {
  93       xbt_die("Communication action %p is in my list but I'm not the sender "
  94           "or the receiver", action);
  95     }
  96   }
  97
  98   xbt_swag_remove(process, simix_global->process_list);
  99   xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
 100   xbt_swag_insert(process, simix_global->process_to_destroy);
 101   process->context->iwannadie = 0;
 102 }
 103
 104 /**
 105  * Garbage collection
 106  *
 107  * Should be called some time to time to free the memory allocated for processes
 108  * that have finished (or killed).
 109  */
 110 void SIMIX_process_empty_trash(void)
 111 {
 112   smx_process_t process = NULL;
 113
 114   while ((process = xbt_swag_extract(simix_global->process_to_destroy))) {
 115     SIMIX_context_free(process->context);
 116
 117     /* Free the exception allocated at creation time */
 118     free(process->running_ctx);
 119     xbt_dict_free(&process->properties);
 120
 121     xbt_fifo_free(process->comms);
 122
 123     xbt_dynar_free(&process->on_exit);
 124
 125     xbt_free(process->name);
 126     xbt_free(process);
 127   }
 128 }
 129
 130 /**
 131  * \brief Creates and runs the maestro process
 132  */
 133 void SIMIX_create_maestro_process()
 134 {
 135   smx_process_t maestro = NULL;
 136
 137   /* Create maestro process and intilialize it */
 138   maestro = xbt_new0(s_smx_process_t, 1);
 139   maestro->pid = simix_process_maxpid++;
 140   maestro->name = (char *) "";
 141   maestro->running_ctx = xbt_new(xbt_running_ctx_t, 1);
 142   XBT_RUNNING_CTX_INITIALIZE(maestro->running_ctx);
 143   maestro->context = SIMIX_context_new(NULL, 0, NULL, NULL, maestro);
 144   maestro->simcall.issuer = maestro;
 145
 146   if (SIMIX_process_self()) {
 147     maestro->ppid = SIMIX_process_get_PID(SIMIX_process_self());
 148   } else {
 149     maestro->ppid = -1;
 150   }
 151
 152   simix_global->maestro_process = maestro;
 153   return;
 154 }
 155 /**
 156  * \brief Stops a process.
 157  *
 158  * Stops the process, execute all the registered on_exit functions,
 159  * register it to the list of the process to restart if needed
 160  * and stops its context.
 161  */
 162 void SIMIX_process_stop(smx_process_t arg) {
 163   /* execute the on_exit functions */
 164   SIMIX_process_on_exit_runall(arg);
 165   /* Add the process to the list of process to restart, only if
 166    * the host is down
 167    */
 168   if (arg->auto_restart && !SIMIX_host_get_state(arg->smx_host)) {
 169     SIMIX_host_add_auto_restart_process(arg->smx_host,arg->name,arg->code, arg->data,
 170                                         sg_host_name(arg->smx_host),
 171                                         arg->kill_time,
 172                                         arg->argc,arg->argv,arg->properties,
 173                                         arg->auto_restart);
 174   }
 175   XBT_DEBUG("Process %s (%s) is dead",arg->name,sg_host_name(arg->smx_host));
 176   /* stop the context */
 177   SIMIX_context_stop(arg->context);
 178 }
 179
 180 /**
 181  * \brief Same as SIMIX_process_create() but with only one argument (used by timers).
 182  * This function frees the argument.
 183  * \return the process created
 184  */
 185 smx_process_t SIMIX_process_create_from_wrapper(smx_process_arg_t args) {
 186
 187   smx_process_t process;
 188   simix_global->create_process_function(
 189       &process,
 190       args->name,
 191       args->code,
 192       args->data,
 193       args->hostname,
 194       args->kill_time,
 195       args->argc,
 196       args->argv,
 197       args->properties,
 198       args->auto_restart);
 199   xbt_free(args);
 200   return process;
 201 }
 202
 203
 204 void SIMIX_pre_process_create(smx_simcall_t simcall,
 205                           smx_process_t *process,
 206                           const char *name,
 207                           xbt_main_func_t code,
 208                           void *data,
 209                           const char *hostname,
 210                           double kill_time,
 211                           int argc, char **argv,
 212                           xbt_dict_t properties,
 213                           int auto_restart){
 214   SIMIX_process_create_with_parent(process, name, code, data, hostname,
 215                               kill_time, argc, argv, properties, auto_restart,
 216                               simcall->issuer);
 217 }
 218 /**
 219  * \brief Internal function to create a process.
 220  *
 221  * This function actually creates the process.
 222  * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
 223  * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
 224  *
 225  * \return the process created
 226  */
 227 void SIMIX_process_create(smx_process_t *process,
 228                           const char *name,
 229                           xbt_main_func_t code,
 230                           void *data,
 231                           const char *hostname,
 232                           double kill_time,
 233                           int argc, char **argv,
 234                           xbt_dict_t properties,
 235                           int auto_restart) {
 236   SIMIX_process_create_with_parent(process, name, code, data, hostname,
 237                                    kill_time, argc, argv, properties, auto_restart, NULL);
 238 }
 239
 240 void SIMIX_process_create_with_parent(smx_process_t *process,
 241                                   const char *name,
 242                                   xbt_main_func_t code,
 243                                   void *data,
 244                                   const char *hostname,
 245                                   double kill_time,
 246                                   int argc, char **argv,
 247                                   xbt_dict_t properties,
 248                                   int auto_restart,
 249                                   smx_process_t parent_process) {
 250   *process = NULL;
 251   smx_host_t host = SIMIX_host_get_by_name(hostname);
 252
 253   XBT_DEBUG("Start process %s on host '%s'", name, hostname);
 254
 255   if (!SIMIX_host_get_state(host)) {
 256     int i;
 257     XBT_WARN("Cannot launch process '%s' on failed host '%s'", name,
 258           hostname);
 259     for (i = 0; i < argc; i++)
 260       xbt_free(argv[i]);
 261     xbt_free(argv);
 262   }
 263   else {
 264     *process = xbt_new0(s_smx_process_t, 1);
 265
 266     xbt_assert(((code != NULL) && (host != NULL)), "Invalid parameters");
 267     /* Process data */
 268     (*process)->pid = simix_process_maxpid++;
 269     (*process)->name = xbt_strdup(name);
 270     (*process)->smx_host = host;
 271     (*process)->data = data;
 272     (*process)->comms = xbt_fifo_new();
 273     (*process)->simcall.issuer = *process;
 274
 275      if (parent_process) {
 276        (*process)->ppid = SIMIX_process_get_PID(parent_process);
 277      } else {
 278        (*process)->ppid = -1;
 279      }
 280
 281     /* Process data for auto-restart */
 282     (*process)->auto_restart = auto_restart;
 283     (*process)->code = code;
 284     (*process)->argc = argc;
 285     (*process)->argv = argv;
 286     (*process)->kill_time = kill_time;
 287
 288
 289     XBT_VERB("Create context %s", (*process)->name);
 290     (*process)->context = SIMIX_context_new(code, argc, argv,
 291       simix_global->cleanup_process_function, *process);
 292
 293     (*process)->running_ctx = xbt_new(xbt_running_ctx_t, 1);
 294     XBT_RUNNING_CTX_INITIALIZE((*process)->running_ctx);
 295
 296     if(MC_is_active()){
 297       MC_ignore_heap((*process)->running_ctx, sizeof(*(*process)->running_ctx));
 298     }
 299
 300     /* Add properties */
 301     (*process)->properties = properties;
 302
 303     /* Add the process to it's host process list */
 304     xbt_swag_insert(*process, SIMIX_host_priv(host)->process_list);
 305
 306     XBT_DEBUG("Start context '%s'", (*process)->name);
 307
 308     /* Now insert it in the global process list and in the process to run list */
 309     xbt_swag_insert(*process, simix_global->process_list);
 310     XBT_DEBUG("Inserting %s(%s) in the to_run list", (*process)->name, sg_host_name(host));
 311     xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, *process);
 312   }
 313
 314   if (kill_time > SIMIX_get_clock()) {
 315     if (simix_global->kill_process_function) {
 316       XBT_DEBUG("Process %s(%s) will be kill at time %f", (*process)->name,
 317           sg_host_name((*process)->smx_host), kill_time);
 318       SIMIX_timer_set(kill_time, simix_global->kill_process_function, *process);
 319     }
 320   }
 321 }
 322
 323 /**
 324  * \brief Executes the processes from simix_global->process_to_run.
 325  *
 326  * The processes of simix_global->process_to_run are run (in parallel if
 327  * possible).  On exit, simix_global->process_to_run is empty, and
 328  * simix_global->process_that_ran contains the list of processes that just ran.
 329  * The two lists are swapped so, be careful when using them before and after a
 330  * call to this function.
 331  */
 332 void SIMIX_process_runall(void)
 333 {
 334   SIMIX_context_runall();
 335
 336   xbt_dynar_t tmp = simix_global->process_that_ran;
 337   simix_global->process_that_ran = simix_global->process_to_run;
 338   simix_global->process_to_run = tmp;
 339   xbt_dynar_reset(simix_global->process_to_run);
 340 }
 341
 342 void SIMIX_pre_process_kill(smx_simcall_t simcall, smx_process_t process) {
 343   SIMIX_process_kill(process, simcall->issuer);
 344 }
 345 /**
 346  * \brief Internal function to kill a SIMIX process.
 347  *
 348  * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
 349  * or directly for SIMIX internal purposes.
 350  *
 351  * \param process poor victim
 352  * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
 353  */
 354 void SIMIX_process_kill(smx_process_t process, smx_process_t issuer) {
 355
 356   XBT_DEBUG("Killing process %s on %s", process->name, sg_host_name(process->smx_host));
 357
 358   process->context->iwannadie = 1;
 359   process->blocked = 0;
 360   process->suspended = 0;
 361   /* FIXME: set doexception to 0 also? */
 362
 363   /* destroy the blocking action if any */
 364   if (process->waiting_action) {
 365
 366     switch (process->waiting_action->type) {
 367
 368     case SIMIX_ACTION_EXECUTE:
 369     case SIMIX_ACTION_PARALLEL_EXECUTE:
 370       SIMIX_host_execution_destroy(process->waiting_action);
 371       break;
 372
 373     case SIMIX_ACTION_COMMUNICATE:
 374       xbt_fifo_remove(process->comms, process->waiting_action);
 375       SIMIX_comm_cancel(process->waiting_action);
 376       SIMIX_comm_destroy(process->waiting_action);
 377       break;
 378
 379     case SIMIX_ACTION_SLEEP:
 380       SIMIX_process_sleep_destroy(process->waiting_action);
 381       break;
 382
 383     case SIMIX_ACTION_SYNCHRO:
 384       SIMIX_synchro_stop_waiting(process, &process->simcall);
 385       SIMIX_synchro_destroy(process->waiting_action);
 386       break;
 387
 388     case SIMIX_ACTION_IO:
 389       SIMIX_io_destroy(process->waiting_action);
 390       break;
 391
 392       /* **************************************/
 393       /* TUTORIAL: New API                    */
 394     case SIMIX_ACTION_NEW_API:
 395       SIMIX_new_api_destroy(process->waiting_action);
 396       break;
 397       /* **************************************/
 398
 399     }
 400   }
 401   if(!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
 402     xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
 403   }
 404
 405 }
 406
 407 void SIMIX_pre_process_killall(smx_simcall_t simcall, int reset_pid) {
 408   SIMIX_process_killall(simcall->issuer, reset_pid);
 409 }
 410 /**
 411  * \brief Kills all running processes.
 412  * \param issuer this one will not be killed
 413  */
 414 void SIMIX_process_killall(smx_process_t issuer, int reset_pid)
 415 {
 416   smx_process_t p = NULL;
 417
 418   while ((p = xbt_swag_extract(simix_global->process_list))) {
 419     if (p != issuer) {
 420       SIMIX_process_kill(p,issuer);
 421     }
 422   }
 423
 424   if (reset_pid > 0)
 425     simix_process_maxpid = reset_pid;
 426
 427   SIMIX_context_runall();
 428
 429   SIMIX_process_empty_trash();
 430 }
 431
 432 void SIMIX_pre_process_change_host(smx_simcall_t simcall, smx_process_t process,
 433                                    smx_host_t dest)
 434 {
 435   process->new_host = dest;
 436 }
 437 void SIMIX_process_change_host(smx_process_t process,
 438              smx_host_t dest)
 439 {
 440   xbt_assert((process != NULL), "Invalid parameters");
 441   xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
 442   process->smx_host = dest;
 443   xbt_swag_insert(process, SIMIX_host_priv(dest)->process_list);
 444 }
 445
 446
 447 void SIMIX_pre_process_suspend(smx_simcall_t simcall, smx_process_t process)
 448 {
 449   smx_action_t action_suspend =
 450       SIMIX_process_suspend(process, simcall->issuer);
 451
 452   if (process != simcall->issuer) {
 453     SIMIX_simcall_answer(simcall);
 454   } else {
 455     xbt_fifo_push(action_suspend->simcalls, simcall);
 456     process->waiting_action = action_suspend;
 457     SIMIX_host_execution_suspend(process->waiting_action);
 458   }
 459   /* If we are suspending ourselves, then just do not finish the simcall now */
 460 }
 461
 462 smx_action_t SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
 463 {
 464   xbt_assert((process != NULL), "Invalid parameters");
 465
 466   if (process->suspended) {
 467     XBT_DEBUG("Process '%s' is already suspended", process->name);
 468     return NULL;
 469   }
 470
 471   process->suspended = 1;
 472
 473   /* If we are suspending another process, and it is waiting on an action,
 474      suspend its action. */
 475   if (process != issuer) {
 476
 477     if (process->waiting_action) {
 478
 479       switch (process->waiting_action->type) {
 480
 481         case SIMIX_ACTION_EXECUTE:
 482         case SIMIX_ACTION_PARALLEL_EXECUTE:
 483           SIMIX_host_execution_suspend(process->waiting_action);
 484           break;
 485
 486         case SIMIX_ACTION_COMMUNICATE:
 487           SIMIX_comm_suspend(process->waiting_action);
 488           break;
 489
 490         case SIMIX_ACTION_SLEEP:
 491           SIMIX_process_sleep_suspend(process->waiting_action);
 492           break;
 493
 494         case SIMIX_ACTION_SYNCHRO:
 495           /* Suspension is delayed to when the process is rescheduled. */
 496           break;
 497
 498         default:
 499           xbt_die("Internal error in SIMIX_process_suspend: unexpected action type %d",
 500               (int)process->waiting_action->type);
 501       }
 502       return NULL;
 503     } else {
 504       /* Suspension is delayed to when the process is rescheduled. */
 505       return NULL;
 506     }
 507   } else {
 508     /* FIXME: computation size is zero. Is it okay that bound is zero ? */
 509     return SIMIX_host_execute("suspend", process->smx_host, 0.0, 1.0, 0.0, 0);
 510   }
 511 }
 512
 513 void SIMIX_pre_process_resume(smx_simcall_t simcall, smx_process_t process){
 514   SIMIX_process_resume(process, simcall->issuer);
 515 }
 516
 517 void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
 518 {
 519   xbt_assert((process != NULL), "Invalid parameters");
 520
 521   XBT_IN("process = %p, issuer = %p", process, issuer);
 522
 523   if(process->context->iwannadie) {
 524     XBT_VERB("Ignoring request to suspend a process that is currently dying.");
 525     return;
 526   }
 527
 528   if(!process->suspended) return;
 529   process->suspended = 0;
 530
 531   /* If we are resuming another process, resume the action it was waiting for
 532      if any. Otherwise add it to the list of process to run in the next round. */
 533   if (process != issuer) {
 534
 535     if (process->waiting_action) {
 536
 537       switch (process->waiting_action->type) {
 538
 539         case SIMIX_ACTION_EXECUTE:
 540         case SIMIX_ACTION_PARALLEL_EXECUTE:
 541           SIMIX_host_execution_resume(process->waiting_action);
 542           break;
 543
 544         case SIMIX_ACTION_COMMUNICATE:
 545           SIMIX_comm_resume(process->waiting_action);
 546           break;
 547
 548         case SIMIX_ACTION_SLEEP:
 549           SIMIX_process_sleep_resume(process->waiting_action);
 550           break;
 551
 552         case SIMIX_ACTION_SYNCHRO:
 553           /* I cannot resume it now. This is delayed to when the process is rescheduled at
 554            * the end of the synchro. */
 555           break;
 556
 557         default:
 558           xbt_die("Internal error in SIMIX_process_resume: unexpected action type %d",
 559               (int)process->waiting_action->type);
 560       }
 561     }
 562   } else XBT_WARN("Strange. Process %p is trying to resume himself.", issuer);
 563
 564   XBT_OUT();
 565 }
 566
 567 int SIMIX_process_get_maxpid(void) {
 568   return simix_process_maxpid;
 569 }
 570
 571 int SIMIX_pre_process_count(smx_simcall_t simcall){
 572   return SIMIX_process_count();
 573 }
 574 int SIMIX_process_count(void)
 575 {
 576   return xbt_swag_size(simix_global->process_list);
 577 }
 578
 579 int SIMIX_pre_process_get_PID(smx_simcall_t simcall, smx_process_t self){
 580    return SIMIX_process_get_PID(self);
 581 }
 582
 583 int SIMIX_process_get_PID(smx_process_t self){
 584   if (self == NULL)
 585     return 0;
 586   else
 587     return self->pid;
 588 }
 589
 590 int SIMIX_pre_process_get_PPID(smx_simcall_t simcall, smx_process_t self){
 591   return SIMIX_process_get_PPID(self);
 592 }
 593
 594 int SIMIX_process_get_PPID(smx_process_t self){
 595   if (self == NULL)
 596     return 0;
 597   else
 598     return self->ppid;
 599 }
 600
 601 void* SIMIX_pre_process_self_get_data(smx_simcall_t simcall, smx_process_t self){
 602   return SIMIX_process_self_get_data(self);
 603 }
 604
 605 void* SIMIX_process_self_get_data(smx_process_t self)
 606 {
 607   xbt_assert(self == SIMIX_process_self(), "This is not the current process");
 608
 609   if (!self) {
 610     return NULL;
 611   }
 612   return SIMIX_process_get_data(self);
 613 }
 614
 615 void SIMIX_pre_process_set_data(smx_simcall_t simcall, smx_process_t process,
 616                                 void *data){
 617   SIMIX_process_set_data(process, data);
 618 }
 619 void SIMIX_process_self_set_data(smx_process_t self, void *data)
 620 {
 621   xbt_assert(self == SIMIX_process_self(), "This is not the current process");
 622
 623   SIMIX_process_set_data(self, data);
 624 }
 625
 626 void* SIMIX_pre_process_get_data(smx_simcall_t simcall, smx_process_t process){
 627   return SIMIX_process_get_data(process);
 628 }
 629 void* SIMIX_process_get_data(smx_process_t process)
 630 {
 631   return process->data;
 632 }
 633
 634 void SIMIX_process_set_data(smx_process_t process, void *data)
 635 {
 636   process->data = data;
 637 }
 638
 639 smx_host_t SIMIX_pre_process_get_host(smx_simcall_t simcall, smx_process_t process){
 640   return SIMIX_process_get_host(process);
 641 }
 642 smx_host_t SIMIX_process_get_host(smx_process_t process)
 643 {
 644   return process->smx_host;
 645 }
 646
 647 /* needs to be public and without simcall because it is called
 648    by exceptions and logging events */
 649 const char* SIMIX_process_self_get_name(void) {
 650
 651   smx_process_t process = SIMIX_process_self();
 652   if (process == NULL || process == simix_global->maestro_process)
 653     return "";
 654
 655   return SIMIX_process_get_name(process);
 656 }
 657
 658 const char* SIMIX_pre_process_get_name(smx_simcall_t simcall, smx_process_t process) {
 659   return SIMIX_process_get_name(process);
 660 }
 661 const char* SIMIX_process_get_name(smx_process_t process)
 662 {
 663   return process->name;
 664 }
 665
 666 smx_process_t SIMIX_process_get_by_name(const char* name)
 667 {
 668   smx_process_t proc;
 669
 670   xbt_swag_foreach(proc, simix_global->process_list)
 671   {
 672     if(!strcmp(name, proc->name))
 673       return proc;
 674   }
 675   return NULL;
 676 }
 677
 678 int SIMIX_pre_process_is_suspended(smx_simcall_t simcall, smx_process_t process){
 679   return SIMIX_process_is_suspended(process);
 680 }
 681 int SIMIX_process_is_suspended(smx_process_t process)
 682 {
 683   return process->suspended;
 684 }
 685
 686 xbt_dict_t SIMIX_pre_process_get_properties(smx_simcall_t simcall, smx_process_t process){
 687   return SIMIX_process_get_properties(process);
 688 }
 689 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
 690 {
 691   return process->properties;
 692 }
 693
 694 void SIMIX_pre_process_sleep(smx_simcall_t simcall, double duration)
 695 {
 696   if (MC_is_active()) {
 697     MC_process_clock_add(simcall->issuer, duration);
 698     simcall_process_sleep__set__result(simcall, SIMIX_DONE);
 699     SIMIX_simcall_answer(simcall);
 700     return;
 701   }
 702   smx_action_t action = SIMIX_process_sleep(simcall->issuer, duration);
 703   xbt_fifo_push(action->simcalls, simcall);
 704   simcall->issuer->waiting_action = action;
 705 }
 706
 707 smx_action_t SIMIX_process_sleep(smx_process_t process, double duration)
 708 {
 709   smx_action_t action;
 710   smx_host_t host = process->smx_host;
 711
 712   /* check if the host is active */
 713   if (surf_resource_get_state(surf_workstation_resource_priv(host)) != SURF_RESOURCE_ON) {
 714     THROWF(host_error, 0, "Host %s failed, you cannot call this function",
 715            sg_host_name(host));
 716   }
 717
 718   action = xbt_mallocator_get(simix_global->action_mallocator);
 719   action->type = SIMIX_ACTION_SLEEP;
 720   action->name = NULL;
 721 #ifdef HAVE_TRACING
 722   action->category = NULL;
 723 #endif
 724
 725   action->sleep.host = host;
 726   action->sleep.surf_sleep =
 727       surf_workstation_sleep(host, duration);
 728
 729   surf_action_set_data(action->sleep.surf_sleep, action);
 730   XBT_DEBUG("Create sleep action %p", action);
 731
 732   return action;
 733 }
 734
 735 void SIMIX_post_process_sleep(smx_action_t action)
 736 {
 737   smx_simcall_t simcall;
 738   e_smx_state_t state;
 739   xbt_assert(action->type == SIMIX_ACTION_SLEEP);
 740
 741   while ((simcall = xbt_fifo_shift(action->simcalls))) {
 742
 743     switch(surf_action_get_state(action->sleep.surf_sleep)){
 744       case SURF_ACTION_FAILED:
 745         simcall->issuer->context->iwannadie = 1;
 746         //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 747         state = SIMIX_SRC_HOST_FAILURE;
 748         break;
 749
 750       case SURF_ACTION_DONE:
 751         state = SIMIX_DONE;
 752         break;
 753
 754       default:
 755         THROW_IMPOSSIBLE;
 756         break;
 757     }
 758     if (surf_resource_get_state(surf_workstation_resource_priv(simcall->issuer->smx_host)) != SURF_RESOURCE_ON) {
 759       simcall->issuer->context->iwannadie = 1;
 760     }
 761     simcall_process_sleep__set__result(simcall, state);
 762     simcall->issuer->waiting_action = NULL;
 763     SIMIX_simcall_answer(simcall);
 764   }
 765
 766   SIMIX_process_sleep_destroy(action);
 767 }
 768
 769 void SIMIX_process_sleep_destroy(smx_action_t action)
 770 {
 771   XBT_DEBUG("Destroy action %p", action);
 772   xbt_assert(action->type == SIMIX_ACTION_SLEEP);
 773
 774   if (action->sleep.surf_sleep)
 775     surf_action_unref(action->sleep.surf_sleep);
 776   xbt_mallocator_release(simix_global->action_mallocator, action);
 777 }
 778
 779 void SIMIX_process_sleep_suspend(smx_action_t action)
 780 {
 781   xbt_assert(action->type == SIMIX_ACTION_SLEEP);
 782   surf_action_suspend(action->sleep.surf_sleep);
 783 }
 784
 785 void SIMIX_process_sleep_resume(smx_action_t action)
 786 {
 787   xbt_assert(action->type == SIMIX_ACTION_SLEEP);
 788   surf_action_resume(action->sleep.surf_sleep);
 789 }
 790
 791 /**
 792  * \brief Calling this function makes the process to yield.
 793  *
 794  * Only the current process can call this function, giving back the control to
 795  * maestro.
 796  *
 797  * \param self the current process
 798  */
 799 void SIMIX_process_yield(smx_process_t self)
 800 {
 801   XBT_DEBUG("Yield process '%s'", self->name);
 802
 803   /* Go into sleep and return control to maestro */
 804   SIMIX_context_suspend(self->context);
 805
 806   /* Ok, maestro returned control to us */
 807   XBT_DEBUG("Control returned to me: '%s'", self->name);
 808
 809   if (self->new_host) {
 810     SIMIX_process_change_host(self, self->new_host);
 811     self->new_host = NULL;
 812   }
 813
 814   if (self->context->iwannadie){
 815     XBT_DEBUG("I wanna die!");
 816     SIMIX_process_stop(self);
 817   }
 818
 819   if(self->suspended) {
 820     xbt_assert(!self->doexception, "Gloups! This exception may be lost by subsequent calls.");
 821     self->suspended = 0;
 822     SIMIX_process_suspend(self,self);
 823   }
 824
 825   if (self->doexception) {
 826     XBT_DEBUG("Wait, maestro left me an exception");
 827     self->doexception = 0;
 828     SMX_THROW();
 829   }
 830
 831 }
 832
 833 /* callback: context fetching */
 834 xbt_running_ctx_t *SIMIX_process_get_running_context(void)
 835 {
 836   return SIMIX_process_self()->running_ctx;
 837 }
 838
 839 /* callback: termination */
 840 void SIMIX_process_exception_terminate(xbt_ex_t * e)
 841 {
 842   xbt_ex_display(e);
 843   xbt_abort();
 844 }
 845
 846 smx_context_t SIMIX_process_get_context(smx_process_t p) {
 847   return p->context;
 848 }
 849
 850 void SIMIX_process_set_context(smx_process_t p,smx_context_t c) {
 851   p->context = c;
 852 }
 853
 854 /**
 855  * \brief Returns the list of processes to run.
 856  */
 857 xbt_dynar_t SIMIX_process_get_runnable(void)
 858 {
 859   return simix_global->process_to_run;
 860 }
 861
 862 /**
 863  * \brief Returns the process from PID.
 864  */
 865 smx_process_t SIMIX_process_from_PID(int PID)
 866 {
 867   smx_process_t proc;
 868   xbt_swag_foreach(proc, simix_global->process_list)
 869   {
 870    if(proc->pid == PID)
 871    return proc;
 872   }
 873   return NULL;
 874 }
 875
 876 /** @brief returns a dynar containg all currently existing processes */
 877 xbt_dynar_t SIMIX_processes_as_dynar(void) {
 878   smx_process_t proc;
 879   xbt_dynar_t res = xbt_dynar_new(sizeof(smx_process_t),NULL);
 880   xbt_swag_foreach(proc, simix_global->process_list) {
 881     xbt_dynar_push(res,&proc);
 882   }
 883   return res;
 884 }
 885
 886
 887 void SIMIX_process_on_exit_runall(smx_process_t process) {
 888   s_smx_process_exit_fun_t exit_fun;
 889
 890   while (!xbt_dynar_is_empty(process->on_exit)) {
 891     exit_fun = xbt_dynar_pop_as(process->on_exit,s_smx_process_exit_fun_t);
 892     (exit_fun.fun)(exit_fun.arg);
 893   }
 894 }
 895
 896 void SIMIX_pre_process_on_exit(smx_simcall_t simcall, smx_process_t process,
 897                                int_f_pvoid_t fun, void *data) {
 898   SIMIX_process_on_exit(process, fun, data);
 899 }
 900
 901 void SIMIX_process_on_exit(smx_process_t process, int_f_pvoid_t fun, void *data) {
 902   xbt_assert(process, "current process not found: are you in maestro context ?");
 903
 904   if (!process->on_exit) {
 905     process->on_exit = xbt_dynar_new(sizeof(s_smx_process_exit_fun_t), NULL);
 906   }
 907
 908   s_smx_process_exit_fun_t exit_fun = {fun, data};
 909
 910   xbt_dynar_push_as(process->on_exit,s_smx_process_exit_fun_t,exit_fun);
 911 }
 912
 913 void SIMIX_pre_process_auto_restart_set(smx_simcall_t simcall, smx_process_t process,
 914                                         int auto_restart) {
 915   SIMIX_process_auto_restart_set(process, auto_restart);
 916 }
 917 /**
 918  * \brief Sets the auto-restart status of the process.
 919  * If set to 1, the process will be automatically restarted when its host
 920  * comes back.
 921  */
 922 void SIMIX_process_auto_restart_set(smx_process_t process, int auto_restart) {
 923   process->auto_restart = auto_restart;
 924 }
 925
 926 smx_process_t SIMIX_pre_process_restart(smx_simcall_t simcall, smx_process_t process) {
 927   return SIMIX_process_restart(process, simcall->issuer);
 928 }
 929 /**
 930  * \brief Restart a process.
 931  * Restart a process, starting it again from the beginning.
 932  */
 933 smx_process_t SIMIX_process_restart(smx_process_t process, smx_process_t issuer) {
 934   XBT_DEBUG("Restarting process %s on %s", process->name, sg_host_name(process->smx_host));
 935   //retrieve the arguments of the old process
 936   //FIXME: Factorise this with SIMIX_host_add_auto_restart_process ?
 937   s_smx_process_arg_t arg;
 938   arg.code = process->code;
 939   arg.hostname = sg_host_name(process->smx_host);
 940   arg.kill_time = process->kill_time;
 941   arg.argc = process->argc;
 942   arg.data = process->data;
 943   int i;
 944   arg.argv = xbt_new(char*,process->argc + 1);
 945   for (i = 0; i < arg.argc; i++) {
 946     arg.argv[i] = xbt_strdup(process->argv[i]);
 947   }
 948   arg.argv[process->argc] = NULL;
 949   arg.properties = NULL;
 950   arg.auto_restart = process->auto_restart;
 951   //kill the old process
 952   SIMIX_process_kill(process,issuer);
 953   //start the new process
 954   smx_process_t new_process;
 955   if (simix_global->create_process_function) {
 956     simix_global->create_process_function(&new_process,
 957                                           arg.argv[0],
 958                                           arg.code,
 959                                           arg.data,
 960                                           arg.hostname,
 961                                           arg.kill_time,
 962                                           arg.argc,
 963                                           arg.argv,
 964                                           arg.properties,
 965                                           arg.auto_restart);
 966   }
 967   else {
 968     simcall_process_create(&new_process,
 969                                           arg.argv[0],
 970                                           arg.code,
 971                                           arg.data,
 972                                           arg.hostname,
 973                                           arg.kill_time,
 974                                           arg.argc,
 975                                           arg.argv,
 976                                           arg.properties,
 977                                           arg.auto_restart);
 978
 979   }
 980   return new_process;
 981 }