1 /* Copyright (c) 2007-2014. The SimGrid Team.
2 * All rights reserved. */
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. */
7 #include "smx_private.h"
8 #include "xbt/sysdep.h"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
14 "Logging specific to SIMIX (process)");
16 unsigned long simix_process_maxpid = 0;
19 * \brief Returns the current agent.
21 * This functions returns the currently running SIMIX process.
23 * \return The SIMIX process
25 XBT_INLINE smx_process_t SIMIX_process_self(void)
27 smx_context_t self_context = SIMIX_context_self();
29 return self_context ? SIMIX_context_get_process(self_context) : NULL;
33 * \brief Returns whether a process has pending asynchronous communications.
34 * \return true if there are asynchronous communications in this process
36 int SIMIX_process_has_pending_comms(smx_process_t process) {
38 return xbt_fifo_size(process->comms) > 0;
42 * \brief Moves a process to the list of processes to destroy.
44 void SIMIX_process_cleanup(smx_process_t process)
46 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p",
47 process->name, process, process->waiting_synchro);
49 SIMIX_process_on_exit_runall(process);
51 /* cancel non-blocking communications */
52 smx_synchro_t synchro;
53 while ((synchro = xbt_fifo_pop(process->comms))) {
55 /* make sure no one will finish the comm after this process is destroyed,
56 * because src_proc or dst_proc would be an invalid pointer */
57 SIMIX_comm_cancel(synchro);
59 if (synchro->comm.src_proc == process) {
60 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
61 synchro, synchro->comm.detached, (int)synchro->state, synchro->comm.src_proc, synchro->comm.dst_proc);
62 synchro->comm.src_proc = NULL;
64 /* I'm not supposed to destroy a detached comm from the sender side, */
65 if (!synchro->comm.detached)
66 SIMIX_comm_destroy(synchro);
68 XBT_DEBUG("Don't destroy it since it's a detached comm");
71 else if (synchro->comm.dst_proc == process){
72 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
73 synchro, (int)synchro->state, synchro->comm.src_proc, synchro->comm.dst_proc);
74 synchro->comm.dst_proc = NULL;
76 if (synchro->comm.detached && synchro->comm.refcount == 1
77 && synchro->comm.src_proc != NULL) {
78 /* the comm will be freed right now, remove it from the sender */
79 xbt_fifo_remove(synchro->comm.src_proc->comms, synchro);
81 SIMIX_comm_destroy(synchro);
84 xbt_die("Communication synchro %p is in my list but I'm not the sender "
85 "or the receiver", synchro);
89 xbt_swag_remove(process, simix_global->process_list);
90 xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
91 xbt_swag_insert(process, simix_global->process_to_destroy);
92 process->context->iwannadie = 0;
98 * Should be called some time to time to free the memory allocated for processes
99 * that have finished (or killed).
101 void SIMIX_process_empty_trash(void)
103 smx_process_t process = NULL;
105 while ((process = xbt_swag_extract(simix_global->process_to_destroy))) {
106 SIMIX_context_free(process->context);
108 /* Free the exception allocated at creation time */
109 free(process->running_ctx);
110 xbt_dict_free(&process->properties);
112 xbt_fifo_free(process->comms);
114 xbt_dynar_free(&process->on_exit);
116 xbt_free(process->name);
122 * \brief Creates and runs the maestro process
124 void SIMIX_create_maestro_process()
126 smx_process_t maestro = NULL;
128 /* Create maestro process and intilialize it */
129 maestro = xbt_new0(s_smx_process_t, 1);
130 maestro->pid = simix_process_maxpid++;
132 maestro->name = (char *) "";
133 maestro->running_ctx = xbt_new(xbt_running_ctx_t, 1);
134 XBT_RUNNING_CTX_INITIALIZE(maestro->running_ctx);
135 maestro->context = SIMIX_context_new(NULL, 0, NULL, NULL, maestro);
136 maestro->simcall.issuer = maestro;
137 simix_global->maestro_process = maestro;
141 * \brief Stops a process.
143 * Stops the process, execute all the registered on_exit functions,
144 * register it to the list of the process to restart if needed
145 * and stops its context.
147 void SIMIX_process_stop(smx_process_t arg) {
148 /* execute the on_exit functions */
149 SIMIX_process_on_exit_runall(arg);
150 /* Add the process to the list of process to restart, only if
153 if (arg->auto_restart && !SIMIX_host_get_state(arg->smx_host)) {
154 SIMIX_host_add_auto_restart_process(arg->smx_host,arg->name,arg->code, arg->data,
155 sg_host_name(arg->smx_host),
157 arg->argc,arg->argv,arg->properties,
160 XBT_DEBUG("Process %s (%s) is dead",arg->name,sg_host_name(arg->smx_host));
161 /* stop the context */
162 SIMIX_context_stop(arg->context);
166 * \brief Same as SIMIX_process_create() but with only one argument (used by timers).
167 * This function frees the argument.
168 * \return the process created
170 smx_process_t SIMIX_process_create_from_wrapper(smx_process_arg_t args) {
172 smx_process_t process;
173 simix_global->create_process_function(&process,
189 void simcall_HANDLER_process_create(smx_simcall_t simcall,
190 smx_process_t *process,
192 xbt_main_func_t code,
194 const char *hostname,
196 int argc, char **argv,
197 xbt_dict_t properties,
199 SIMIX_process_create(process, name, code, data, hostname,
200 kill_time, argc, argv, properties, auto_restart,
204 * \brief Internal function to create a process.
206 * This function actually creates the process.
207 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
208 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
210 * \return the process created
212 void SIMIX_process_create(smx_process_t *process,
214 xbt_main_func_t code,
216 const char *hostname,
218 int argc, char **argv,
219 xbt_dict_t properties,
221 smx_process_t parent_process)
224 smx_host_t host = SIMIX_host_get_by_name(hostname);
226 XBT_DEBUG("Start process %s on host '%s'", name, hostname);
228 if (!SIMIX_host_get_state(host)) {
230 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name,
232 for (i = 0; i < argc; i++)
237 *process = xbt_new0(s_smx_process_t, 1);
239 xbt_assert(((code != NULL) && (host != NULL)), "Invalid parameters");
241 (*process)->pid = simix_process_maxpid++;
242 (*process)->name = xbt_strdup(name);
243 (*process)->smx_host = host;
244 (*process)->data = data;
245 (*process)->comms = xbt_fifo_new();
246 (*process)->simcall.issuer = *process;
248 if (parent_process) {
249 (*process)->ppid = SIMIX_process_get_PID(parent_process);
251 (*process)->ppid = -1;
254 /* Process data for auto-restart */
255 (*process)->auto_restart = auto_restart;
256 (*process)->code = code;
257 (*process)->argc = argc;
258 (*process)->argv = argv;
259 (*process)->kill_time = kill_time;
262 XBT_VERB("Create context %s", (*process)->name);
263 (*process)->context = SIMIX_context_new(code, argc, argv,
264 simix_global->cleanup_process_function, *process);
266 (*process)->running_ctx = xbt_new(xbt_running_ctx_t, 1);
267 XBT_RUNNING_CTX_INITIALIZE((*process)->running_ctx);
270 MC_ignore_heap((*process)->running_ctx, sizeof(*(*process)->running_ctx));
274 (*process)->properties = properties;
276 /* Add the process to it's host process list */
277 xbt_swag_insert(*process, SIMIX_host_priv(host)->process_list);
279 XBT_DEBUG("Start context '%s'", (*process)->name);
281 /* Now insert it in the global process list and in the process to run list */
282 xbt_swag_insert(*process, simix_global->process_list);
283 XBT_DEBUG("Inserting %s(%s) in the to_run list", (*process)->name, sg_host_name(host));
284 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, *process);
286 if (kill_time > SIMIX_get_clock() && simix_global->kill_process_function) {
287 XBT_DEBUG("Process %s(%s) will be kill at time %f", (*process)->name,
288 sg_host_name((*process)->smx_host), kill_time);
289 SIMIX_timer_set(kill_time, simix_global->kill_process_function, *process);
295 * \brief Executes the processes from simix_global->process_to_run.
297 * The processes of simix_global->process_to_run are run (in parallel if
298 * possible). On exit, simix_global->process_to_run is empty, and
299 * simix_global->process_that_ran contains the list of processes that just ran.
300 * The two lists are swapped so, be careful when using them before and after a
301 * call to this function.
303 void SIMIX_process_runall(void)
305 SIMIX_context_runall();
307 xbt_dynar_t tmp = simix_global->process_that_ran;
308 simix_global->process_that_ran = simix_global->process_to_run;
309 simix_global->process_to_run = tmp;
310 xbt_dynar_reset(simix_global->process_to_run);
313 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_process_t process) {
314 SIMIX_process_kill(process, simcall->issuer);
317 * \brief Internal function to kill a SIMIX process.
319 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
320 * or directly for SIMIX internal purposes.
322 * \param process poor victim
323 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
325 void SIMIX_process_kill(smx_process_t process, smx_process_t issuer) {
327 XBT_DEBUG("Killing process %s on %s", process->name, sg_host_name(process->smx_host));
329 process->context->iwannadie = 1;
330 process->blocked = 0;
331 process->suspended = 0;
332 process->doexception = 0;
334 /* destroy the blocking synchro if any */
335 if (process->waiting_synchro) {
337 switch (process->waiting_synchro->type) {
339 case SIMIX_SYNC_EXECUTE:
340 case SIMIX_SYNC_PARALLEL_EXECUTE:
341 SIMIX_host_execution_destroy(process->waiting_synchro);
344 case SIMIX_SYNC_COMMUNICATE:
345 xbt_fifo_remove(process->comms, process->waiting_synchro);
346 SIMIX_comm_cancel(process->waiting_synchro);
347 SIMIX_comm_destroy(process->waiting_synchro);
350 case SIMIX_SYNC_SLEEP:
351 SIMIX_process_sleep_destroy(process->waiting_synchro);
354 case SIMIX_SYNC_JOIN:
355 SIMIX_process_sleep_destroy(process->waiting_synchro);
358 case SIMIX_SYNC_SYNCHRO:
359 SIMIX_synchro_stop_waiting(process, &process->simcall);
360 SIMIX_synchro_destroy(process->waiting_synchro);
364 SIMIX_io_destroy(process->waiting_synchro);
369 if(!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
370 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
375 /** @brief Ask another process to raise the given exception
377 * @param cat category of exception
378 * @param value value associated to the exception
379 * @param msg string information associated to the exception
381 void SIMIX_process_throw(smx_process_t process, xbt_errcat_t cat, int value, const char *msg) {
382 SMX_EXCEPTION(process, cat, value, msg);
384 if (process->suspended)
385 SIMIX_process_resume(process,SIMIX_process_self());
387 /* cancel the blocking synchro if any */
388 if (process->waiting_synchro) {
390 switch (process->waiting_synchro->type) {
392 case SIMIX_SYNC_EXECUTE:
393 case SIMIX_SYNC_PARALLEL_EXECUTE:
394 SIMIX_host_execution_cancel(process->waiting_synchro);
397 case SIMIX_SYNC_COMMUNICATE:
398 xbt_fifo_remove(process->comms, process->waiting_synchro);
399 SIMIX_comm_cancel(process->waiting_synchro);
402 case SIMIX_SYNC_SLEEP:
403 SIMIX_process_sleep_destroy(process->waiting_synchro);
406 case SIMIX_SYNC_JOIN:
407 SIMIX_process_sleep_destroy(process->waiting_synchro);
410 case SIMIX_SYNC_SYNCHRO:
411 SIMIX_synchro_stop_waiting(process, &process->simcall);
415 SIMIX_io_destroy(process->waiting_synchro);
420 process->waiting_synchro = NULL;
422 if (!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self())
423 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
426 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
427 SIMIX_process_killall(simcall->issuer, reset_pid);
430 * \brief Kills all running processes.
431 * \param issuer this one will not be killed
433 void SIMIX_process_killall(smx_process_t issuer, int reset_pid)
435 smx_process_t p = NULL;
437 while ((p = xbt_swag_extract(simix_global->process_list))) {
439 SIMIX_process_kill(p,issuer);
444 simix_process_maxpid = reset_pid;
446 SIMIX_context_runall();
448 SIMIX_process_empty_trash();
451 void simcall_HANDLER_process_change_host(smx_simcall_t simcall, smx_process_t process,
454 process->new_host = dest;
456 void SIMIX_process_change_host(smx_process_t process,
459 xbt_assert((process != NULL), "Invalid parameters");
460 xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
461 process->smx_host = dest;
462 xbt_swag_insert(process, SIMIX_host_priv(dest)->process_list);
466 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_process_t process)
468 smx_synchro_t sync_suspend =
469 SIMIX_process_suspend(process, simcall->issuer);
471 if (process != simcall->issuer) {
472 SIMIX_simcall_answer(simcall);
474 xbt_fifo_push(sync_suspend->simcalls, simcall);
475 process->waiting_synchro = sync_suspend;
476 SIMIX_host_execution_suspend(process->waiting_synchro);
478 /* If we are suspending ourselves, then just do not finish the simcall now */
481 smx_synchro_t SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
483 xbt_assert((process != NULL), "Invalid parameters");
485 if (process->suspended) {
486 XBT_DEBUG("Process '%s' is already suspended", process->name);
490 process->suspended = 1;
492 /* If we are suspending another process, and it is waiting on a sync,
493 suspend its synchronization. */
494 if (process != issuer) {
496 if (process->waiting_synchro) {
498 switch (process->waiting_synchro->type) {
500 case SIMIX_SYNC_EXECUTE:
501 case SIMIX_SYNC_PARALLEL_EXECUTE:
502 SIMIX_host_execution_suspend(process->waiting_synchro);
505 case SIMIX_SYNC_COMMUNICATE:
506 SIMIX_comm_suspend(process->waiting_synchro);
509 case SIMIX_SYNC_SLEEP:
510 SIMIX_process_sleep_suspend(process->waiting_synchro);
513 case SIMIX_SYNC_SYNCHRO:
514 /* Suspension is delayed to when the process is rescheduled. */
518 xbt_die("Internal error in SIMIX_process_suspend: unexpected synchronization type %d",
519 (int)process->waiting_synchro->type);
523 /* Suspension is delayed to when the process is rescheduled. */
527 /* FIXME: computation size is zero. Is it okay that bound is zero ? */
528 return SIMIX_host_execute("suspend", process->smx_host, 0.0, 1.0, 0.0, 0);
532 void simcall_HANDLER_process_resume(smx_simcall_t simcall, smx_process_t process){
533 SIMIX_process_resume(process, simcall->issuer);
536 void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
538 XBT_IN("process = %p, issuer = %p", process, issuer);
540 if(process->context->iwannadie) {
541 XBT_VERB("Ignoring request to suspend a process that is currently dying.");
545 if(!process->suspended) return;
546 process->suspended = 0;
548 /* If we are resuming another process, resume the synchronization it was waiting for
549 if any. Otherwise add it to the list of process to run in the next round. */
550 if (process != issuer) {
552 if (process->waiting_synchro) {
554 switch (process->waiting_synchro->type) {
556 case SIMIX_SYNC_EXECUTE:
557 case SIMIX_SYNC_PARALLEL_EXECUTE:
558 SIMIX_host_execution_resume(process->waiting_synchro);
561 case SIMIX_SYNC_COMMUNICATE:
562 SIMIX_comm_resume(process->waiting_synchro);
565 case SIMIX_SYNC_SLEEP:
566 SIMIX_process_sleep_resume(process->waiting_synchro);
569 case SIMIX_SYNC_SYNCHRO:
570 /* I cannot resume it now. This is delayed to when the process is rescheduled at
571 * the end of the synchro. */
575 xbt_die("Internal error in SIMIX_process_resume: unexpected synchronization type %d",
576 (int)process->waiting_synchro->type);
579 } else XBT_WARN("Strange. Process %p is trying to resume himself.", issuer);
584 int SIMIX_process_get_maxpid(void) {
585 return simix_process_maxpid;
588 int SIMIX_process_count(void)
590 return xbt_swag_size(simix_global->process_list);
593 int SIMIX_process_get_PID(smx_process_t self){
600 int SIMIX_process_get_PPID(smx_process_t self){
607 void* SIMIX_process_self_get_data(smx_process_t self)
609 xbt_assert(self == SIMIX_process_self(), "This is not the current process");
614 return SIMIX_process_get_data(self);
617 void SIMIX_process_self_set_data(smx_process_t self, void *data)
619 xbt_assert(self == SIMIX_process_self(), "This is not the current process");
621 SIMIX_process_set_data(self, data);
624 void* SIMIX_process_get_data(smx_process_t process)
626 return process->data;
629 void SIMIX_process_set_data(smx_process_t process, void *data)
631 process->data = data;
634 smx_host_t SIMIX_process_get_host(smx_process_t process)
636 return process->smx_host;
639 /* needs to be public and without simcall because it is called
640 by exceptions and logging events */
641 const char* SIMIX_process_self_get_name(void) {
643 smx_process_t process = SIMIX_process_self();
644 if (process == NULL || process == simix_global->maestro_process)
647 return SIMIX_process_get_name(process);
650 const char* SIMIX_process_get_name(smx_process_t process)
652 return process->name;
655 smx_process_t SIMIX_process_get_by_name(const char* name)
659 xbt_swag_foreach(proc, simix_global->process_list)
661 if(!strcmp(name, proc->name))
667 int SIMIX_process_is_suspended(smx_process_t process)
669 return process->suspended;
672 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
674 return process->properties;
677 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_process_t process, double timeout)
679 smx_synchro_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
680 xbt_fifo_push(sync->simcalls, simcall);
681 simcall->issuer->waiting_synchro = sync;
684 static int SIMIX_process_join_finish(smx_process_exit_status_t status, smx_synchro_t sync){
685 if (sync->sleep.surf_sleep) {
686 surf_action_cancel(sync->sleep.surf_sleep);
688 smx_simcall_t simcall;
689 while ((simcall = xbt_fifo_shift(sync->simcalls))) {
690 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
691 simcall->issuer->waiting_synchro = NULL;
692 if (simcall->issuer->suspended) {
693 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
694 simcall->issuer->suspended = 0;
695 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
697 SIMIX_simcall_answer(simcall);
700 surf_action_unref(sync->sleep.surf_sleep);
701 sync->sleep.surf_sleep = NULL;
703 xbt_mallocator_release(simix_global->synchro_mallocator, sync);
707 smx_synchro_t SIMIX_process_join(smx_process_t issuer, smx_process_t process, double timeout)
709 smx_synchro_t res = SIMIX_process_sleep(issuer, timeout);
710 res->type = SIMIX_SYNC_JOIN;
711 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, res);
715 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
717 if (MC_is_active() || MC_record_replay_is_active()) {
718 MC_process_clock_add(simcall->issuer, duration);
719 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
720 SIMIX_simcall_answer(simcall);
723 smx_synchro_t sync = SIMIX_process_sleep(simcall->issuer, duration);
724 xbt_fifo_push(sync->simcalls, simcall);
725 simcall->issuer->waiting_synchro = sync;
728 smx_synchro_t SIMIX_process_sleep(smx_process_t process, double duration)
730 smx_synchro_t synchro;
731 smx_host_t host = process->smx_host;
733 /* check if the host is active */
734 if (surf_resource_get_state(surf_workstation_resource_priv(host)) != SURF_RESOURCE_ON) {
735 THROWF(host_error, 0, "Host %s failed, you cannot call this function",
739 synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
740 synchro->type = SIMIX_SYNC_SLEEP;
741 synchro->name = NULL;
743 synchro->category = NULL;
746 synchro->sleep.host = host;
747 synchro->sleep.surf_sleep =
748 surf_workstation_sleep(host, duration);
750 surf_action_set_data(synchro->sleep.surf_sleep, synchro);
751 XBT_DEBUG("Create sleep synchronization %p", synchro);
756 void SIMIX_post_process_sleep(smx_synchro_t synchro)
758 smx_simcall_t simcall;
760 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP || synchro->type == SIMIX_SYNC_JOIN);
762 while ((simcall = xbt_fifo_shift(synchro->simcalls))) {
764 switch(surf_action_get_state(synchro->sleep.surf_sleep)){
765 case SURF_ACTION_FAILED:
766 simcall->issuer->context->iwannadie = 1;
767 //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
768 state = SIMIX_SRC_HOST_FAILURE;
771 case SURF_ACTION_DONE:
779 if (surf_resource_get_state(surf_workstation_resource_priv(simcall->issuer->smx_host)) != SURF_RESOURCE_ON) {
780 simcall->issuer->context->iwannadie = 1;
782 simcall_process_sleep__set__result(simcall, state);
783 simcall->issuer->waiting_synchro = NULL;
784 if (simcall->issuer->suspended) {
785 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
786 simcall->issuer->suspended = 0;
787 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
789 SIMIX_simcall_answer(simcall);
793 SIMIX_process_sleep_destroy(synchro);
796 void SIMIX_process_sleep_destroy(smx_synchro_t synchro)
798 XBT_DEBUG("Destroy synchro %p", synchro);
799 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP || synchro->type == SIMIX_SYNC_JOIN);
801 if (synchro->sleep.surf_sleep) {
802 surf_action_unref(synchro->sleep.surf_sleep);
803 synchro->sleep.surf_sleep = NULL;
805 if (synchro->type == SIMIX_SYNC_SLEEP)
806 xbt_mallocator_release(simix_global->synchro_mallocator, synchro);
809 void SIMIX_process_sleep_suspend(smx_synchro_t synchro)
811 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP);
812 surf_action_suspend(synchro->sleep.surf_sleep);
815 void SIMIX_process_sleep_resume(smx_synchro_t synchro)
817 XBT_DEBUG("Synchro state is %d on process_sleep_resume.", synchro->state);
818 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP);
819 surf_action_resume(synchro->sleep.surf_sleep);
823 * \brief Calling this function makes the process to yield.
825 * Only the current process can call this function, giving back the control to
828 * \param self the current process
830 void SIMIX_process_yield(smx_process_t self)
832 XBT_DEBUG("Yield process '%s'", self->name);
834 /* Go into sleep and return control to maestro */
835 SIMIX_context_suspend(self->context);
837 /* Ok, maestro returned control to us */
838 XBT_DEBUG("Control returned to me: '%s'", self->name);
840 if (self->new_host) {
841 SIMIX_process_change_host(self, self->new_host);
842 self->new_host = NULL;
845 if (self->context->iwannadie){
846 XBT_DEBUG("I wanna die!");
847 SIMIX_process_stop(self);
850 if (self->suspended) {
851 XBT_DEBUG("Hey! I'm suspended.");
852 xbt_assert(!self->doexception, "Gasp! This exception may be lost by subsequent calls.");
854 SIMIX_process_suspend(self, self);
857 if (self->doexception) {
858 XBT_DEBUG("Wait, maestro left me an exception");
859 self->doexception = 0;
865 /* callback: context fetching */
866 xbt_running_ctx_t *SIMIX_process_get_running_context(void)
868 return SIMIX_process_self()->running_ctx;
871 /* callback: termination */
872 void SIMIX_process_exception_terminate(xbt_ex_t * e)
878 smx_context_t SIMIX_process_get_context(smx_process_t p) {
882 void SIMIX_process_set_context(smx_process_t p,smx_context_t c) {
887 * \brief Returns the list of processes to run.
889 xbt_dynar_t SIMIX_process_get_runnable(void)
891 return simix_global->process_to_run;
895 * \brief Returns the process from PID.
897 smx_process_t SIMIX_process_from_PID(int PID)
900 xbt_swag_foreach(proc, simix_global->process_list)
908 /** @brief returns a dynar containg all currently existing processes */
909 xbt_dynar_t SIMIX_processes_as_dynar(void) {
911 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_process_t),NULL);
912 xbt_swag_foreach(proc, simix_global->process_list) {
913 xbt_dynar_push(res,&proc);
919 void SIMIX_process_on_exit_runall(smx_process_t process) {
920 s_smx_process_exit_fun_t exit_fun;
921 smx_process_exit_status_t exit_status = (process->context->iwannadie) ?
922 SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
923 while (!xbt_dynar_is_empty(process->on_exit)) {
924 exit_fun = xbt_dynar_pop_as(process->on_exit,s_smx_process_exit_fun_t);
925 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
929 void SIMIX_process_on_exit(smx_process_t process, int_f_pvoid_pvoid_t fun, void *data) {
930 xbt_assert(process, "current process not found: are you in maestro context ?");
932 if (!process->on_exit) {
933 process->on_exit = xbt_dynar_new(sizeof(s_smx_process_exit_fun_t), NULL);
936 s_smx_process_exit_fun_t exit_fun = {fun, data};
938 xbt_dynar_push_as(process->on_exit,s_smx_process_exit_fun_t,exit_fun);
942 * \brief Sets the auto-restart status of the process.
943 * If set to 1, the process will be automatically restarted when its host
946 void SIMIX_process_auto_restart_set(smx_process_t process, int auto_restart) {
947 process->auto_restart = auto_restart;
950 smx_process_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_process_t process) {
951 return SIMIX_process_restart(process, simcall->issuer);
954 * \brief Restart a process.
955 * Restart a process, starting it again from the beginning.
957 smx_process_t SIMIX_process_restart(smx_process_t process, smx_process_t issuer) {
958 XBT_DEBUG("Restarting process %s on %s", process->name, sg_host_name(process->smx_host));
959 //retrieve the arguments of the old process
960 //FIXME: Factorise this with SIMIX_host_add_auto_restart_process ?
961 s_smx_process_arg_t arg;
962 arg.code = process->code;
963 arg.hostname = sg_host_name(process->smx_host);
964 arg.kill_time = process->kill_time;
965 arg.argc = process->argc;
966 arg.data = process->data;
968 arg.argv = xbt_new(char*,process->argc + 1);
969 for (i = 0; i < arg.argc; i++) {
970 arg.argv[i] = xbt_strdup(process->argv[i]);
972 arg.argv[process->argc] = NULL;
973 arg.properties = NULL;
974 arg.auto_restart = process->auto_restart;
975 //kill the old process
976 SIMIX_process_kill(process,issuer);
977 //start the new process
978 smx_process_t new_process;
979 if (simix_global->create_process_function) {
980 simix_global->create_process_function(&new_process,
992 simcall_process_create(&new_process,