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"
12 #include "mc/mc_client.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
15 "Logging specific to SIMIX (process)");
17 unsigned long simix_process_maxpid = 0;
20 * \brief Returns the current agent.
22 * This functions returns the currently running SIMIX process.
24 * \return The SIMIX process
26 XBT_INLINE smx_process_t SIMIX_process_self(void)
28 smx_context_t self_context = SIMIX_context_self();
30 return self_context ? SIMIX_context_get_process(self_context) : NULL;
34 * \brief Returns whether a process has pending asynchronous communications.
35 * \return true if there are asynchronous communications in this process
37 int SIMIX_process_has_pending_comms(smx_process_t process) {
39 return xbt_fifo_size(process->comms) > 0;
43 * \brief Moves a process to the list of processes to destroy.
45 void SIMIX_process_cleanup(smx_process_t process)
47 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p",
48 process->name, process, process->waiting_synchro);
50 SIMIX_process_on_exit_runall(process);
52 /* cancel non-blocking communications */
53 smx_synchro_t synchro;
54 while ((synchro = xbt_fifo_pop(process->comms))) {
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(synchro);
60 if (synchro->comm.src_proc == process) {
61 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
62 synchro, synchro->comm.detached, (int)synchro->state, synchro->comm.src_proc, synchro->comm.dst_proc);
63 synchro->comm.src_proc = NULL;
65 /* I'm not supposed to destroy a detached comm from the sender side, */
66 if (!synchro->comm.detached)
67 SIMIX_comm_destroy(synchro);
69 XBT_DEBUG("Don't destroy it since it's a detached comm");
72 else if (synchro->comm.dst_proc == process){
73 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
74 synchro, (int)synchro->state, synchro->comm.src_proc, synchro->comm.dst_proc);
75 synchro->comm.dst_proc = NULL;
77 if (synchro->comm.detached && synchro->comm.refcount == 1
78 && synchro->comm.src_proc != NULL) {
79 /* the comm will be freed right now, remove it from the sender */
80 xbt_fifo_remove(synchro->comm.src_proc->comms, synchro);
82 SIMIX_comm_destroy(synchro);
85 xbt_die("Communication synchro %p is in my list but I'm not the sender "
86 "or the receiver", synchro);
90 xbt_swag_remove(process, simix_global->process_list);
91 xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
92 xbt_swag_insert(process, simix_global->process_to_destroy);
93 process->context->iwannadie = 0;
99 * Should be called some time to time to free the memory allocated for processes
100 * that have finished (or killed).
102 void SIMIX_process_empty_trash(void)
104 smx_process_t process = NULL;
106 while ((process = xbt_swag_extract(simix_global->process_to_destroy))) {
107 SIMIX_context_free(process->context);
109 /* Free the exception allocated at creation time */
110 free(process->running_ctx);
111 xbt_dict_free(&process->properties);
113 xbt_fifo_free(process->comms);
115 xbt_dynar_free(&process->on_exit);
117 xbt_free(process->name);
123 * \brief Creates and runs the maestro process
125 void SIMIX_create_maestro_process()
127 smx_process_t maestro = NULL;
129 /* Create maestro process and intilialize it */
130 maestro = xbt_new0(s_smx_process_t, 1);
131 maestro->pid = simix_process_maxpid++;
133 maestro->name = (char *) "";
134 maestro->running_ctx = xbt_new(xbt_running_ctx_t, 1);
135 XBT_RUNNING_CTX_INITIALIZE(maestro->running_ctx);
136 maestro->context = SIMIX_context_new(NULL, 0, NULL, NULL, maestro);
137 maestro->simcall.issuer = maestro;
138 simix_global->maestro_process = maestro;
142 * \brief Stops a process.
144 * Stops the process, execute all the registered on_exit functions,
145 * register it to the list of the process to restart if needed
146 * and stops its context.
148 void SIMIX_process_stop(smx_process_t arg) {
149 /* execute the on_exit functions */
150 SIMIX_process_on_exit_runall(arg);
151 /* Add the process to the list of process to restart, only if
154 if (arg->auto_restart && !SIMIX_host_get_state(arg->smx_host)) {
155 SIMIX_host_add_auto_restart_process(arg->smx_host,arg->name,arg->code, arg->data,
156 sg_host_name(arg->smx_host),
158 arg->argc,arg->argv,arg->properties,
161 XBT_DEBUG("Process %s (%s) is dead",arg->name,sg_host_name(arg->smx_host));
162 /* stop the context */
163 SIMIX_context_stop(arg->context);
167 * \brief Same as SIMIX_process_create() but with only one argument (used by timers).
168 * This function frees the argument.
169 * \return the process created
171 smx_process_t SIMIX_process_create_from_wrapper(smx_process_arg_t args) {
173 smx_process_t process;
174 simix_global->create_process_function(&process,
190 void simcall_HANDLER_process_create(smx_simcall_t simcall,
191 smx_process_t *process,
193 xbt_main_func_t code,
195 const char *hostname,
197 int argc, char **argv,
198 xbt_dict_t properties,
200 SIMIX_process_create(process, name, code, data, hostname,
201 kill_time, argc, argv, properties, auto_restart,
205 * \brief Internal function to create a process.
207 * This function actually creates the process.
208 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
209 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
211 * \return the process created
213 void SIMIX_process_create(smx_process_t *process,
215 xbt_main_func_t code,
217 const char *hostname,
219 int argc, char **argv,
220 xbt_dict_t properties,
222 smx_process_t parent_process)
225 smx_host_t host = SIMIX_host_get_by_name(hostname);
227 XBT_DEBUG("Start process %s on host '%s'", name, hostname);
229 if (!SIMIX_host_get_state(host)) {
231 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name,
233 for (i = 0; i < argc; i++)
238 *process = xbt_new0(s_smx_process_t, 1);
240 xbt_assert(((code != NULL) && (host != NULL)), "Invalid parameters");
242 (*process)->pid = simix_process_maxpid++;
243 (*process)->name = xbt_strdup(name);
244 (*process)->smx_host = host;
245 (*process)->data = data;
246 (*process)->comms = xbt_fifo_new();
247 (*process)->simcall.issuer = *process;
249 if (parent_process) {
250 (*process)->ppid = SIMIX_process_get_PID(parent_process);
252 (*process)->ppid = -1;
255 /* Process data for auto-restart */
256 (*process)->auto_restart = auto_restart;
257 (*process)->code = code;
258 (*process)->argc = argc;
259 (*process)->argv = argv;
260 (*process)->kill_time = kill_time;
263 XBT_VERB("Create context %s", (*process)->name);
264 (*process)->context = SIMIX_context_new(code, argc, argv,
265 simix_global->cleanup_process_function, *process);
267 (*process)->running_ctx = xbt_new(xbt_running_ctx_t, 1);
268 XBT_RUNNING_CTX_INITIALIZE((*process)->running_ctx);
271 MC_ignore_heap((*process)->running_ctx, sizeof(*(*process)->running_ctx));
275 (*process)->properties = properties;
277 /* Add the process to it's host process list */
278 xbt_swag_insert(*process, SIMIX_host_priv(host)->process_list);
280 XBT_DEBUG("Start context '%s'", (*process)->name);
282 /* Now insert it in the global process list and in the process to run list */
283 xbt_swag_insert(*process, simix_global->process_list);
284 XBT_DEBUG("Inserting %s(%s) in the to_run list", (*process)->name, sg_host_name(host));
285 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, *process);
287 if (kill_time > SIMIX_get_clock() && simix_global->kill_process_function) {
288 XBT_DEBUG("Process %s(%s) will be kill at time %f", (*process)->name,
289 sg_host_name((*process)->smx_host), kill_time);
290 SIMIX_timer_set(kill_time, simix_global->kill_process_function, *process);
296 * \brief Executes the processes from simix_global->process_to_run.
298 * The processes of simix_global->process_to_run are run (in parallel if
299 * possible). On exit, simix_global->process_to_run is empty, and
300 * simix_global->process_that_ran contains the list of processes that just ran.
301 * The two lists are swapped so, be careful when using them before and after a
302 * call to this function.
304 void SIMIX_process_runall(void)
306 SIMIX_context_runall();
308 xbt_dynar_t tmp = simix_global->process_that_ran;
309 simix_global->process_that_ran = simix_global->process_to_run;
310 simix_global->process_to_run = tmp;
311 xbt_dynar_reset(simix_global->process_to_run);
314 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_process_t process) {
315 SIMIX_process_kill(process, simcall->issuer);
318 * \brief Internal function to kill a SIMIX process.
320 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
321 * or directly for SIMIX internal purposes.
323 * \param process poor victim
324 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
326 void SIMIX_process_kill(smx_process_t process, smx_process_t issuer) {
328 XBT_DEBUG("Killing process %s on %s", process->name, sg_host_name(process->smx_host));
330 process->context->iwannadie = 1;
331 process->blocked = 0;
332 process->suspended = 0;
333 process->doexception = 0;
335 /* destroy the blocking synchro if any */
336 if (process->waiting_synchro) {
338 switch (process->waiting_synchro->type) {
340 case SIMIX_SYNC_EXECUTE:
341 case SIMIX_SYNC_PARALLEL_EXECUTE:
342 SIMIX_host_execution_destroy(process->waiting_synchro);
345 case SIMIX_SYNC_COMMUNICATE:
346 xbt_fifo_remove(process->comms, process->waiting_synchro);
347 SIMIX_comm_cancel(process->waiting_synchro);
348 SIMIX_comm_destroy(process->waiting_synchro);
351 case SIMIX_SYNC_SLEEP:
352 SIMIX_process_sleep_destroy(process->waiting_synchro);
355 case SIMIX_SYNC_JOIN:
356 SIMIX_process_sleep_destroy(process->waiting_synchro);
359 case SIMIX_SYNC_SYNCHRO:
360 SIMIX_synchro_stop_waiting(process, &process->simcall);
361 SIMIX_synchro_destroy(process->waiting_synchro);
365 SIMIX_io_destroy(process->waiting_synchro);
370 if(!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
371 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
376 /** @brief Ask another process to raise the given exception
378 * @param cat category of exception
379 * @param value value associated to the exception
380 * @param msg string information associated to the exception
382 void SIMIX_process_throw(smx_process_t process, xbt_errcat_t cat, int value, const char *msg) {
383 SMX_EXCEPTION(process, cat, value, msg);
385 if (process->suspended)
386 SIMIX_process_resume(process,SIMIX_process_self());
388 /* cancel the blocking synchro if any */
389 if (process->waiting_synchro) {
391 switch (process->waiting_synchro->type) {
393 case SIMIX_SYNC_EXECUTE:
394 case SIMIX_SYNC_PARALLEL_EXECUTE:
395 SIMIX_host_execution_cancel(process->waiting_synchro);
398 case SIMIX_SYNC_COMMUNICATE:
399 xbt_fifo_remove(process->comms, process->waiting_synchro);
400 SIMIX_comm_cancel(process->waiting_synchro);
403 case SIMIX_SYNC_SLEEP:
404 SIMIX_process_sleep_destroy(process->waiting_synchro);
407 case SIMIX_SYNC_JOIN:
408 SIMIX_process_sleep_destroy(process->waiting_synchro);
411 case SIMIX_SYNC_SYNCHRO:
412 SIMIX_synchro_stop_waiting(process, &process->simcall);
416 SIMIX_io_destroy(process->waiting_synchro);
421 process->waiting_synchro = NULL;
423 if (!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self())
424 xbt_dynar_push_as(simix_global->process_to_run, smx_process_t, process);
427 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
428 SIMIX_process_killall(simcall->issuer, reset_pid);
431 * \brief Kills all running processes.
432 * \param issuer this one will not be killed
434 void SIMIX_process_killall(smx_process_t issuer, int reset_pid)
436 smx_process_t p = NULL;
438 while ((p = xbt_swag_extract(simix_global->process_list))) {
440 SIMIX_process_kill(p,issuer);
445 simix_process_maxpid = reset_pid;
447 SIMIX_context_runall();
449 SIMIX_process_empty_trash();
452 void simcall_HANDLER_process_change_host(smx_simcall_t simcall, smx_process_t process,
455 process->new_host = dest;
457 void SIMIX_process_change_host(smx_process_t process,
460 xbt_assert((process != NULL), "Invalid parameters");
461 xbt_swag_remove(process, SIMIX_host_priv(process->smx_host)->process_list);
462 process->smx_host = dest;
463 xbt_swag_insert(process, SIMIX_host_priv(dest)->process_list);
467 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_process_t process)
469 smx_synchro_t sync_suspend =
470 SIMIX_process_suspend(process, simcall->issuer);
472 if (process != simcall->issuer) {
473 SIMIX_simcall_answer(simcall);
475 xbt_fifo_push(sync_suspend->simcalls, simcall);
476 process->waiting_synchro = sync_suspend;
477 SIMIX_host_execution_suspend(process->waiting_synchro);
479 /* If we are suspending ourselves, then just do not finish the simcall now */
482 smx_synchro_t SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
484 xbt_assert((process != NULL), "Invalid parameters");
486 if (process->suspended) {
487 XBT_DEBUG("Process '%s' is already suspended", process->name);
491 process->suspended = 1;
493 /* If we are suspending another process, and it is waiting on a sync,
494 suspend its synchronization. */
495 if (process != issuer) {
497 if (process->waiting_synchro) {
499 switch (process->waiting_synchro->type) {
501 case SIMIX_SYNC_EXECUTE:
502 case SIMIX_SYNC_PARALLEL_EXECUTE:
503 SIMIX_host_execution_suspend(process->waiting_synchro);
506 case SIMIX_SYNC_COMMUNICATE:
507 SIMIX_comm_suspend(process->waiting_synchro);
510 case SIMIX_SYNC_SLEEP:
511 SIMIX_process_sleep_suspend(process->waiting_synchro);
514 case SIMIX_SYNC_SYNCHRO:
515 /* Suspension is delayed to when the process is rescheduled. */
519 xbt_die("Internal error in SIMIX_process_suspend: unexpected synchronization type %d",
520 (int)process->waiting_synchro->type);
524 /* Suspension is delayed to when the process is rescheduled. */
528 /* FIXME: computation size is zero. Is it okay that bound is zero ? */
529 return SIMIX_host_execute("suspend", process->smx_host, 0.0, 1.0, 0.0, 0);
533 void simcall_HANDLER_process_resume(smx_simcall_t simcall, smx_process_t process){
534 SIMIX_process_resume(process, simcall->issuer);
537 void SIMIX_process_resume(smx_process_t process, smx_process_t issuer)
539 XBT_IN("process = %p, issuer = %p", process, issuer);
541 if(process->context->iwannadie) {
542 XBT_VERB("Ignoring request to suspend a process that is currently dying.");
546 if(!process->suspended) return;
547 process->suspended = 0;
549 /* If we are resuming another process, resume the synchronization it was waiting for
550 if any. Otherwise add it to the list of process to run in the next round. */
551 if (process != issuer) {
553 if (process->waiting_synchro) {
555 switch (process->waiting_synchro->type) {
557 case SIMIX_SYNC_EXECUTE:
558 case SIMIX_SYNC_PARALLEL_EXECUTE:
559 SIMIX_host_execution_resume(process->waiting_synchro);
562 case SIMIX_SYNC_COMMUNICATE:
563 SIMIX_comm_resume(process->waiting_synchro);
566 case SIMIX_SYNC_SLEEP:
567 SIMIX_process_sleep_resume(process->waiting_synchro);
570 case SIMIX_SYNC_SYNCHRO:
571 /* I cannot resume it now. This is delayed to when the process is rescheduled at
572 * the end of the synchro. */
576 xbt_die("Internal error in SIMIX_process_resume: unexpected synchronization type %d",
577 (int)process->waiting_synchro->type);
580 } else XBT_WARN("Strange. Process %p is trying to resume himself.", issuer);
585 int SIMIX_process_get_maxpid(void) {
586 return simix_process_maxpid;
589 int SIMIX_process_count(void)
591 return xbt_swag_size(simix_global->process_list);
594 int SIMIX_process_get_PID(smx_process_t self){
601 int SIMIX_process_get_PPID(smx_process_t self){
608 void* SIMIX_process_self_get_data(smx_process_t self)
610 xbt_assert(self == SIMIX_process_self(), "This is not the current process");
615 return SIMIX_process_get_data(self);
618 void SIMIX_process_self_set_data(smx_process_t self, void *data)
620 xbt_assert(self == SIMIX_process_self(), "This is not the current process");
622 SIMIX_process_set_data(self, data);
625 void* SIMIX_process_get_data(smx_process_t process)
627 return process->data;
630 void SIMIX_process_set_data(smx_process_t process, void *data)
632 process->data = data;
635 smx_host_t SIMIX_process_get_host(smx_process_t process)
637 return process->smx_host;
640 /* needs to be public and without simcall because it is called
641 by exceptions and logging events */
642 const char* SIMIX_process_self_get_name(void) {
644 smx_process_t process = SIMIX_process_self();
645 if (process == NULL || process == simix_global->maestro_process)
648 return SIMIX_process_get_name(process);
651 const char* SIMIX_process_get_name(smx_process_t process)
653 return process->name;
656 smx_process_t SIMIX_process_get_by_name(const char* name)
660 xbt_swag_foreach(proc, simix_global->process_list)
662 if(!strcmp(name, proc->name))
668 int SIMIX_process_is_suspended(smx_process_t process)
670 return process->suspended;
673 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
675 return process->properties;
678 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_process_t process, double timeout)
680 smx_synchro_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
681 xbt_fifo_push(sync->simcalls, simcall);
682 simcall->issuer->waiting_synchro = sync;
685 static int SIMIX_process_join_finish(smx_process_exit_status_t status, smx_synchro_t sync){
686 if (sync->sleep.surf_sleep) {
687 surf_action_cancel(sync->sleep.surf_sleep);
689 smx_simcall_t simcall;
690 while ((simcall = xbt_fifo_shift(sync->simcalls))) {
691 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
692 simcall->issuer->waiting_synchro = NULL;
693 if (simcall->issuer->suspended) {
694 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
695 simcall->issuer->suspended = 0;
696 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
698 SIMIX_simcall_answer(simcall);
701 surf_action_unref(sync->sleep.surf_sleep);
702 sync->sleep.surf_sleep = NULL;
704 xbt_mallocator_release(simix_global->synchro_mallocator, sync);
708 smx_synchro_t SIMIX_process_join(smx_process_t issuer, smx_process_t process, double timeout)
710 smx_synchro_t res = SIMIX_process_sleep(issuer, timeout);
711 res->type = SIMIX_SYNC_JOIN;
712 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, res);
716 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
718 if (MC_is_active() || MC_record_replay_is_active()) {
719 MC_process_clock_add(simcall->issuer, duration);
720 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
721 SIMIX_simcall_answer(simcall);
724 smx_synchro_t sync = SIMIX_process_sleep(simcall->issuer, duration);
725 xbt_fifo_push(sync->simcalls, simcall);
726 simcall->issuer->waiting_synchro = sync;
729 smx_synchro_t SIMIX_process_sleep(smx_process_t process, double duration)
731 smx_synchro_t synchro;
732 smx_host_t host = process->smx_host;
734 /* check if the host is active */
735 if (surf_resource_get_state(surf_workstation_resource_priv(host)) != SURF_RESOURCE_ON) {
736 THROWF(host_error, 0, "Host %s failed, you cannot call this function",
740 synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
741 synchro->type = SIMIX_SYNC_SLEEP;
742 synchro->name = NULL;
744 synchro->category = NULL;
747 synchro->sleep.host = host;
748 synchro->sleep.surf_sleep =
749 surf_workstation_sleep(host, duration);
751 surf_action_set_data(synchro->sleep.surf_sleep, synchro);
752 XBT_DEBUG("Create sleep synchronization %p", synchro);
757 void SIMIX_post_process_sleep(smx_synchro_t synchro)
759 smx_simcall_t simcall;
761 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP || synchro->type == SIMIX_SYNC_JOIN);
763 while ((simcall = xbt_fifo_shift(synchro->simcalls))) {
765 switch(surf_action_get_state(synchro->sleep.surf_sleep)){
766 case SURF_ACTION_FAILED:
767 simcall->issuer->context->iwannadie = 1;
768 //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
769 state = SIMIX_SRC_HOST_FAILURE;
772 case SURF_ACTION_DONE:
780 if (surf_resource_get_state(surf_workstation_resource_priv(simcall->issuer->smx_host)) != SURF_RESOURCE_ON) {
781 simcall->issuer->context->iwannadie = 1;
783 simcall_process_sleep__set__result(simcall, state);
784 simcall->issuer->waiting_synchro = NULL;
785 if (simcall->issuer->suspended) {
786 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
787 simcall->issuer->suspended = 0;
788 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
790 SIMIX_simcall_answer(simcall);
794 SIMIX_process_sleep_destroy(synchro);
797 void SIMIX_process_sleep_destroy(smx_synchro_t synchro)
799 XBT_DEBUG("Destroy synchro %p", synchro);
800 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP || synchro->type == SIMIX_SYNC_JOIN);
802 if (synchro->sleep.surf_sleep) {
803 surf_action_unref(synchro->sleep.surf_sleep);
804 synchro->sleep.surf_sleep = NULL;
806 if (synchro->type == SIMIX_SYNC_SLEEP)
807 xbt_mallocator_release(simix_global->synchro_mallocator, synchro);
810 void SIMIX_process_sleep_suspend(smx_synchro_t synchro)
812 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP);
813 surf_action_suspend(synchro->sleep.surf_sleep);
816 void SIMIX_process_sleep_resume(smx_synchro_t synchro)
818 XBT_DEBUG("Synchro state is %d on process_sleep_resume.", synchro->state);
819 xbt_assert(synchro->type == SIMIX_SYNC_SLEEP);
820 surf_action_resume(synchro->sleep.surf_sleep);
824 * \brief Calling this function makes the process to yield.
826 * Only the current process can call this function, giving back the control to
829 * \param self the current process
831 void SIMIX_process_yield(smx_process_t self)
833 XBT_DEBUG("Yield process '%s'", self->name);
835 /* Go into sleep and return control to maestro */
836 SIMIX_context_suspend(self->context);
838 /* Ok, maestro returned control to us */
839 XBT_DEBUG("Control returned to me: '%s'", self->name);
841 if (self->new_host) {
842 SIMIX_process_change_host(self, self->new_host);
843 self->new_host = NULL;
846 if (self->context->iwannadie){
847 XBT_DEBUG("I wanna die!");
848 SIMIX_process_stop(self);
851 if (self->suspended) {
852 XBT_DEBUG("Hey! I'm suspended.");
853 xbt_assert(!self->doexception, "Gasp! This exception may be lost by subsequent calls.");
855 SIMIX_process_suspend(self, self);
858 if (self->doexception) {
859 XBT_DEBUG("Wait, maestro left me an exception");
860 self->doexception = 0;
866 /* callback: context fetching */
867 xbt_running_ctx_t *SIMIX_process_get_running_context(void)
869 return SIMIX_process_self()->running_ctx;
872 /* callback: termination */
873 void SIMIX_process_exception_terminate(xbt_ex_t * e)
879 smx_context_t SIMIX_process_get_context(smx_process_t p) {
883 void SIMIX_process_set_context(smx_process_t p,smx_context_t c) {
888 * \brief Returns the list of processes to run.
890 xbt_dynar_t SIMIX_process_get_runnable(void)
892 return simix_global->process_to_run;
896 * \brief Returns the process from PID.
898 smx_process_t SIMIX_process_from_PID(int PID)
901 xbt_swag_foreach(proc, simix_global->process_list)
909 /** @brief returns a dynar containg all currently existing processes */
910 xbt_dynar_t SIMIX_processes_as_dynar(void) {
912 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_process_t),NULL);
913 xbt_swag_foreach(proc, simix_global->process_list) {
914 xbt_dynar_push(res,&proc);
920 void SIMIX_process_on_exit_runall(smx_process_t process) {
921 s_smx_process_exit_fun_t exit_fun;
922 smx_process_exit_status_t exit_status = (process->context->iwannadie) ?
923 SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
924 while (!xbt_dynar_is_empty(process->on_exit)) {
925 exit_fun = xbt_dynar_pop_as(process->on_exit,s_smx_process_exit_fun_t);
926 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
930 void SIMIX_process_on_exit(smx_process_t process, int_f_pvoid_pvoid_t fun, void *data) {
931 xbt_assert(process, "current process not found: are you in maestro context ?");
933 if (!process->on_exit) {
934 process->on_exit = xbt_dynar_new(sizeof(s_smx_process_exit_fun_t), NULL);
937 s_smx_process_exit_fun_t exit_fun = {fun, data};
939 xbt_dynar_push_as(process->on_exit,s_smx_process_exit_fun_t,exit_fun);
943 * \brief Sets the auto-restart status of the process.
944 * If set to 1, the process will be automatically restarted when its host
947 void SIMIX_process_auto_restart_set(smx_process_t process, int auto_restart) {
948 process->auto_restart = auto_restart;
951 smx_process_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_process_t process) {
952 return SIMIX_process_restart(process, simcall->issuer);
955 * \brief Restart a process.
956 * Restart a process, starting it again from the beginning.
958 smx_process_t SIMIX_process_restart(smx_process_t process, smx_process_t issuer) {
959 XBT_DEBUG("Restarting process %s on %s", process->name, sg_host_name(process->smx_host));
960 //retrieve the arguments of the old process
961 //FIXME: Factorise this with SIMIX_host_add_auto_restart_process ?
962 s_smx_process_arg_t arg;
963 arg.code = process->code;
964 arg.hostname = sg_host_name(process->smx_host);
965 arg.kill_time = process->kill_time;
966 arg.argc = process->argc;
967 arg.data = process->data;
969 arg.argv = xbt_new(char*,process->argc + 1);
970 for (i = 0; i < arg.argc; i++) {
971 arg.argv[i] = xbt_strdup(process->argv[i]);
973 arg.argv[process->argc] = NULL;
974 arg.properties = NULL;
975 arg.auto_restart = process->auto_restart;
976 //kill the old process
977 SIMIX_process_kill(process,issuer);
978 //start the new process
979 smx_process_t new_process;
980 if (simix_global->create_process_function) {
981 simix_global->create_process_function(&new_process,
993 simcall_process_create(&new_process,