1 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <boost/range/algorithm.hpp>
15 #include "xbt/functional.hpp"
17 #include "xbt/sysdep.h"
19 #include "simgrid/s4u/Host.hpp"
23 #include "smx_private.h"
24 #include "src/kernel/activity/SleepImpl.hpp"
25 #include "src/kernel/activity/SynchroIo.hpp"
26 #include "src/kernel/activity/SynchroRaw.hpp"
27 #include "src/mc/mc_replay.h"
28 #include "src/mc/remote/Client.hpp"
29 #include "src/msg/msg_private.h"
30 #include "src/surf/cpu_interface.hpp"
31 #include "src/surf/surf_interface.hpp"
34 #include "src/smpi/private.h"
37 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix, "Logging specific to SIMIX (process)");
39 unsigned long simix_process_maxpid = 0;
42 * \brief Returns the current agent.
44 * This functions returns the currently running SIMIX process.
46 * \return The SIMIX process
48 smx_actor_t SIMIX_process_self()
50 smx_context_t self_context = SIMIX_context_self();
52 return (self_context != nullptr) ? self_context->process() : nullptr;
56 * \brief Returns whether a process has pending asynchronous communications.
57 * \return true if there are asynchronous communications in this process
59 int SIMIX_process_has_pending_comms(smx_actor_t process) {
61 return process->comms.size() > 0;
65 * \brief Moves a process to the list of processes to destroy.
67 void SIMIX_process_cleanup(smx_actor_t process)
69 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p", process->name.c_str(), process,
70 process->waiting_synchro.get());
72 process->finished = true;
73 SIMIX_process_on_exit_runall(process);
75 /* Unregister from the kill timer if any */
76 if (process->kill_timer != nullptr)
77 SIMIX_timer_remove(process->kill_timer);
79 xbt_os_mutex_acquire(simix_global->mutex);
81 /* cancel non-blocking communications */
82 smx_activity_t synchro = process->comms.front();
83 while (not process->comms.empty()) {
84 simgrid::kernel::activity::CommImplPtr comm =
85 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
87 /* make sure no one will finish the comm after this process is destroyed,
88 * because src_proc or dst_proc would be an invalid pointer */
90 if (comm->src_proc == process) {
91 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p", comm.get(),
92 comm->detached, (int)comm->state, comm->src_proc, comm->dst_proc);
93 comm->src_proc = nullptr;
95 } else if (comm->dst_proc == process) {
96 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p", comm.get(), (int)comm->state,
97 comm->src_proc, comm->dst_proc);
98 comm->dst_proc = nullptr;
100 if (comm->detached && comm->src_proc != nullptr) {
101 /* the comm will be freed right now, remove it from the sender */
102 comm->src_proc->comms.remove(comm);
105 xbt_die("Communication synchro %p is in my list but I'm not the sender nor the receiver", synchro.get());
107 process->comms.pop_front();
108 synchro = process->comms.front();
112 XBT_DEBUG("%p should not be run anymore",process);
113 simix_global->process_list.erase(process->pid);
115 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
116 xbt_swag_insert(process, simix_global->process_to_destroy);
117 process->context->iwannadie = 0;
119 xbt_os_mutex_release(simix_global->mutex);
125 * Should be called some time to time to free the memory allocated for processes that have finished (or killed).
127 void SIMIX_process_empty_trash()
129 smx_actor_t process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
132 XBT_DEBUG("Getting rid of %p",process);
133 intrusive_ptr_release(process);
134 process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
141 ActorImpl::~ActorImpl()
143 delete this->context;
144 xbt_dict_free(&this->properties);
147 static int dying_daemon(void* exit_status, void* data)
149 std::vector<ActorImpl*>* vect = &simix_global->daemons;
151 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
152 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
154 /* Don't move the whole content since we don't really care about the order */
155 std::swap(*it, vect->back());
160 /** This process will be terminated automatically when the last non-daemon process finishes */
161 void ActorImpl::daemonize()
165 simix_global->daemons.push_back(this);
166 SIMIX_process_on_exit(this, dying_daemon, this);
170 smx_activity_t ActorImpl::suspend(smx_actor_t issuer)
173 XBT_DEBUG("Process '%s' is already suspended", name.c_str());
179 /* If we are suspending another process that is waiting on a sync, suspend its synchronization. */
180 if (this != issuer) {
182 waiting_synchro->suspend();
183 /* If the other process is not waiting, its suspension is delayed to when the process is rescheduled. */
187 return SIMIX_execution_start(this, "suspend", 0.0, 1.0, 0.0);
191 void ActorImpl::resume()
193 XBT_IN("process = %p", this);
195 if (context->iwannadie) {
196 XBT_VERB("Ignoring request to suspend a process that is currently dying.");
204 /* resume the synchronization that was blocking the resumed process. */
206 waiting_synchro->resume();
211 smx_activity_t ActorImpl::sleep(double duration)
214 THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->getCname());
216 simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
217 synchro->host = host;
218 synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
219 synchro->surf_sleep->setData(synchro);
220 XBT_DEBUG("Create sleep synchronization %p", synchro);
225 void create_maestro(std::function<void()> code)
227 smx_actor_t maestro = nullptr;
228 /* Create maestro process and initialize it */
229 maestro = new simgrid::simix::ActorImpl();
230 maestro->pid = simix_process_maxpid++;
232 maestro->data = nullptr;
235 maestro->context = SIMIX_context_new(std::function<void()>(), nullptr, maestro);
237 if (not simix_global)
238 xbt_die("simix is not initialized, please call MSG_init first");
240 simix_global->context_factory->create_maestro(code, maestro);
243 maestro->simcall.issuer = maestro;
244 simix_global->maestro_process = maestro;
250 /** @brief Creates and runs the maestro process */
251 void SIMIX_maestro_create(void (*code)(void*), void* data)
253 simgrid::simix::create_maestro(std::bind(code, data));
257 * \brief Internal function to create a process.
259 * This function actually creates the process.
260 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
261 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
263 * \return the process created
265 smx_actor_t SIMIX_process_create(const char* name, std::function<void()> code, void* data, simgrid::s4u::Host* host,
266 xbt_dict_t properties, smx_actor_t parent_process)
269 XBT_DEBUG("Start process %s on host '%s'", name, host->getCname());
272 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, host->getCname());
276 smx_actor_t process = new simgrid::simix::ActorImpl();
278 xbt_assert(code && host != nullptr, "Invalid parameters");
280 process->pid = simix_process_maxpid++;
281 process->name = simgrid::xbt::string(name);
282 process->host = host;
283 process->data = data;
284 process->simcall.issuer = process;
286 if (parent_process != nullptr) {
287 process->ppid = parent_process->pid;
288 /* SMPI process have their own data segment and each other inherit from their father */
290 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
291 if (parent_process->pid != 0) {
292 process->segment_index = parent_process->segment_index;
294 process->segment_index = process->pid - 1;
300 process->code = code;
302 XBT_VERB("Create context %s", process->name.c_str());
303 process->context = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
306 process->properties = properties;
308 /* Make sure that the process is initialized for simix, in case we are called from the Host::onCreation signal */
309 if (host->extension<simgrid::simix::Host>() == nullptr)
310 host->extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
312 /* Add the process to its host process list */
313 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
315 XBT_DEBUG("Start context '%s'", process->name.c_str());
317 /* Now insert it in the global process list and in the process to run list */
318 simix_global->process_list[process->pid] = process;
319 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->getCname());
320 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
321 intrusive_ptr_add_ref(process);
323 /* Tracing the process creation */
324 TRACE_msg_process_create(process->cname(), process->pid, process->host);
329 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname, xbt_dict_t properties,
330 smx_actor_t parent_process)
332 // This is mostly a copy/paste from SIMIX_process_new(),
333 // it'd be nice to share some code between those two functions.
335 sg_host_t host = sg_host_by_name(hostname);
336 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
339 XBT_WARN("Cannot launch process '%s' on failed host '%s'",
344 smx_actor_t process = new simgrid::simix::ActorImpl();
346 process->pid = simix_process_maxpid++;
347 process->name = std::string(name);
348 process->host = host;
349 process->data = data;
350 process->simcall.issuer = process;
352 if (parent_process != nullptr) {
353 process->ppid = parent_process->pid;
354 /* SMPI process have their own data segment and each other inherit from their father */
356 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
357 if (parent_process->pid != 0) {
358 process->segment_index = parent_process->segment_index;
360 process->segment_index = process->pid - 1;
366 /* Process data for auto-restart */
367 process->code = nullptr;
369 XBT_VERB("Create context %s", process->name.c_str());
370 if (not simix_global)
371 xbt_die("simix is not initialized, please call MSG_init first");
372 process->context = simix_global->context_factory->attach(
373 simix_global->cleanup_process_function, process);
376 process->properties = properties;
378 /* Add the process to it's host process list */
379 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
381 /* Now insert it in the global process list and in the process to run list */
382 simix_global->process_list[process->pid] = process;
383 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->getCname());
384 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
386 /* Tracing the process creation */
387 TRACE_msg_process_create(process->cname(), process->pid, process->host);
389 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context);
391 xbt_die("Not a suitable context");
393 context->attach_start();
397 void SIMIX_process_detach()
399 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
401 xbt_die("Not a suitable context");
403 simix_global->cleanup_process_function(context->process());
405 // Let maestro ignore we are still alive:
406 // xbt_swag_remove(context->process(), simix_global->process_list);
408 // TODO, Remove from proces list:
409 // xbt_swag_remove(process, sg_host_simix(host)->process_list);
411 context->attach_stop();
416 * \brief Executes the processes from simix_global->process_to_run.
418 * The processes of simix_global->process_to_run are run (in parallel if
419 * possible). On exit, simix_global->process_to_run is empty, and
420 * simix_global->process_that_ran contains the list of processes that just ran.
421 * The two lists are swapped so, be careful when using them before and after a
422 * call to this function.
424 void SIMIX_process_runall()
426 SIMIX_context_runall();
428 xbt_dynar_t tmp = simix_global->process_that_ran;
429 simix_global->process_that_ran = simix_global->process_to_run;
430 simix_global->process_to_run = tmp;
431 xbt_dynar_reset(simix_global->process_to_run);
434 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_actor_t process) {
435 SIMIX_process_kill(process, simcall->issuer);
438 * \brief Internal function to kill a SIMIX process.
440 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
441 * or directly for SIMIX internal purposes.
443 * \param process poor victim
444 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
446 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
448 XBT_DEBUG("Killing process %s@%s", process->cname(), process->host->getCname());
450 process->context->iwannadie = 1;
451 process->blocked = 0;
452 process->suspended = 0;
453 process->exception = nullptr;
455 /* destroy the blocking synchro if any */
456 if (process->waiting_synchro != nullptr) {
458 simgrid::kernel::activity::ExecImplPtr exec =
459 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
460 simgrid::kernel::activity::CommImplPtr comm =
461 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
462 simgrid::kernel::activity::SleepImplPtr sleep =
463 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
464 simgrid::kernel::activity::RawImplPtr raw =
465 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
466 simgrid::kernel::activity::IoImplPtr io =
467 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
469 if (exec != nullptr) {
471 } else if (comm != nullptr) {
472 process->comms.remove(process->waiting_synchro);
474 // Remove first occurrence of &process->simcall:
475 auto i = boost::range::find(process->waiting_synchro->simcalls, &process->simcall);
476 if (i != process->waiting_synchro->simcalls.end())
477 process->waiting_synchro->simcalls.remove(&process->simcall);
478 } else if (sleep != nullptr) {
479 SIMIX_process_sleep_destroy(process->waiting_synchro);
481 } else if (raw != nullptr) {
482 SIMIX_synchro_stop_waiting(process, &process->simcall);
484 } else if (io != nullptr) {
485 SIMIX_io_destroy(process->waiting_synchro);
487 xbt_die("Unknown type of activity");
491 switch (process->waiting_synchro->type) {
492 case SIMIX_SYNC_JOIN:
493 SIMIX_process_sleep_destroy(process->waiting_synchro);
497 process->waiting_synchro = nullptr;
499 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
500 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
501 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
505 /** @brief Ask another process to raise the given exception
507 * @param process The process that should raise that exception
508 * @param cat category of exception
509 * @param value value associated to the exception
510 * @param msg string information associated to the exception
512 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
513 SMX_EXCEPTION(process, cat, value, msg);
515 if (process->suspended)
518 /* cancel the blocking synchro if any */
519 if (process->waiting_synchro) {
521 simgrid::kernel::activity::ExecImplPtr exec =
522 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
523 if (exec != nullptr) {
524 SIMIX_execution_cancel(process->waiting_synchro);
527 simgrid::kernel::activity::CommImplPtr comm =
528 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
529 if (comm != nullptr) {
530 process->comms.remove(comm);
534 simgrid::kernel::activity::SleepImplPtr sleep =
535 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
536 if (sleep != nullptr) {
537 SIMIX_process_sleep_destroy(process->waiting_synchro);
538 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self()) {
539 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
540 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
544 simgrid::kernel::activity::RawImplPtr raw =
545 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
546 if (raw != nullptr) {
547 SIMIX_synchro_stop_waiting(process, &process->simcall);
550 simgrid::kernel::activity::IoImplPtr io =
551 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
553 SIMIX_io_destroy(process->waiting_synchro);
556 process->waiting_synchro = nullptr;
560 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
561 SIMIX_process_killall(simcall->issuer, reset_pid);
564 * \brief Kills all running processes.
565 * \param issuer this one will not be killed
567 void SIMIX_process_killall(smx_actor_t issuer, int reset_pid)
569 for (auto kv : simix_global->process_list)
570 if (kv.second != issuer)
571 SIMIX_process_kill(kv.second, issuer);
574 simix_process_maxpid = reset_pid;
576 SIMIX_context_runall();
578 SIMIX_process_empty_trash();
581 void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest)
583 xbt_assert((process != nullptr), "Invalid parameters");
584 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
585 process->host = dest;
586 xbt_swag_insert(process, dest->extension<simgrid::simix::Host>()->process_list);
589 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_actor_t process)
591 smx_activity_t sync_suspend = process->suspend(simcall->issuer);
593 if (process != simcall->issuer) {
594 SIMIX_simcall_answer(simcall);
596 sync_suspend->simcalls.push_back(simcall);
597 process->waiting_synchro = sync_suspend;
598 process->waiting_synchro->suspend();
600 /* If we are suspending ourselves, then just do not finish the simcall now */
603 int SIMIX_process_get_maxpid() {
604 return simix_process_maxpid;
607 int SIMIX_process_count()
609 return simix_global->process_list.size();
612 void* SIMIX_process_self_get_data()
614 smx_actor_t self = SIMIX_process_self();
622 void SIMIX_process_self_set_data(void *data)
624 smx_actor_t self = SIMIX_process_self();
626 SIMIX_process_set_data(self, data);
629 void SIMIX_process_set_data(smx_actor_t process, void *data)
631 process->data = data;
634 /* needs to be public and without simcall because it is called
635 by exceptions and logging events */
636 const char* SIMIX_process_self_get_name() {
638 smx_actor_t process = SIMIX_process_self();
639 if (process == nullptr || process == simix_global->maestro_process)
642 return process->name.c_str();
645 smx_actor_t SIMIX_process_get_by_name(const char* name)
647 for (auto kv : simix_global->process_list)
648 if (kv.second->name == name)
653 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_actor_t process, double timeout)
655 if (process->finished) {
656 // The joined process is already finished, just wake up the issuer process right away
657 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
658 SIMIX_simcall_answer(simcall);
661 smx_activity_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
662 sync->simcalls.push_back(simcall);
663 simcall->issuer->waiting_synchro = sync;
666 static int SIMIX_process_join_finish(smx_process_exit_status_t status, void* synchro)
668 simgrid::kernel::activity::SleepImpl* sleep = static_cast<simgrid::kernel::activity::SleepImpl*>(synchro);
670 if (sleep->surf_sleep) {
671 sleep->surf_sleep->cancel();
673 while (not sleep->simcalls.empty()) {
674 smx_simcall_t simcall = sleep->simcalls.front();
675 sleep->simcalls.pop_front();
676 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
677 simcall->issuer->waiting_synchro = nullptr;
678 if (simcall->issuer->suspended) {
679 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
680 simcall->issuer->suspended = 0;
681 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
683 SIMIX_simcall_answer(simcall);
686 sleep->surf_sleep->unref();
687 sleep->surf_sleep = nullptr;
689 // intrusive_ptr_release(process); // FIXME: We are leaking here. See comment in SIMIX_process_join()
693 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
695 smx_activity_t res = issuer->sleep(timeout);
696 intrusive_ptr_add_ref(res.get());
697 /* We are leaking the process here, but if we don't take the ref, we get a "use after free".
698 * The correct solution would be to derivate the type SynchroSleep into a SynchroProcessJoin,
699 * but the code is not clean enough for now for this.
700 * The C API should first be properly replaced with the C++ one, which is a fair amount of work.
702 intrusive_ptr_add_ref(process);
703 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, &*res);
707 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
709 if (MC_is_active() || MC_record_replay_is_active()) {
710 MC_process_clock_add(simcall->issuer, duration);
711 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
712 SIMIX_simcall_answer(simcall);
715 smx_activity_t sync = simcall->issuer->sleep(duration);
716 sync->simcalls.push_back(simcall);
717 simcall->issuer->waiting_synchro = sync;
720 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
722 XBT_DEBUG("Destroy sleep synchro %p", synchro.get());
723 simgrid::kernel::activity::SleepImplPtr sleep =
724 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(synchro);
726 if (sleep->surf_sleep) {
727 sleep->surf_sleep->unref();
728 sleep->surf_sleep = nullptr;
733 * \brief Calling this function makes the process to yield.
735 * Only the current process can call this function, giving back the control to
738 * \param self the current process
740 void SIMIX_process_yield(smx_actor_t self)
742 XBT_DEBUG("Yield actor '%s'", self->cname());
744 /* Go into sleep and return control to maestro */
745 self->context->suspend();
747 /* Ok, maestro returned control to us */
748 XBT_DEBUG("Control returned to me: '%s'", self->name.c_str());
750 if (self->new_host) {
751 SIMIX_process_change_host(self, self->new_host);
752 self->new_host = nullptr;
755 if (self->context->iwannadie){
756 XBT_DEBUG("I wanna die!");
757 self->finished = true;
758 /* execute the on_exit functions */
759 SIMIX_process_on_exit_runall(self);
760 /* Add the process to the list of process to restart, only if the host is down */
761 if (self->auto_restart && self->host->isOff()) {
762 SIMIX_host_add_auto_restart_process(self->host, self->cname(),
763 self->code, self->data,
764 SIMIX_timer_get_date(self->kill_timer),
768 XBT_DEBUG("Process %s@%s is dead", self->cname(), self->host->getCname());
769 self->context->stop();
772 if (self->suspended) {
773 XBT_DEBUG("Hey! I'm suspended.");
774 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
779 if (self->exception != nullptr) {
780 XBT_DEBUG("Wait, maestro left me an exception");
781 std::exception_ptr exception = std::move(self->exception);
782 self->exception = nullptr;
783 std::rethrow_exception(std::move(exception));
786 if(SMPI_switch_data_segment && self->segment_index != -1){
787 SMPI_switch_data_segment(self->segment_index);
791 /* callback: termination */
792 void SIMIX_process_exception_terminate(xbt_ex_t * e)
799 * \brief Returns the list of processes to run.
801 xbt_dynar_t SIMIX_process_get_runnable()
803 return simix_global->process_to_run;
807 * \brief Returns the process from PID.
809 smx_actor_t SIMIX_process_from_PID(aid_t PID)
811 if (simix_global->process_list.find(PID) == simix_global->process_list.end())
813 return simix_global->process_list.at(PID);
816 /** @brief returns a dynar containing all currently existing processes */
817 xbt_dynar_t SIMIX_processes_as_dynar() {
818 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t),nullptr);
819 for (auto kv : simix_global->process_list) {
820 smx_actor_t proc = kv.second;
821 xbt_dynar_push(res,&proc);
826 void SIMIX_process_on_exit_runall(smx_actor_t process) {
827 smx_process_exit_status_t exit_status = (process->context->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
828 while (not process->on_exit.empty()) {
829 s_smx_process_exit_fun_t exit_fun = process->on_exit.back();
830 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
831 process->on_exit.pop_back();
835 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void *data) {
836 xbt_assert(process, "current process not found: are you in maestro context ?");
838 s_smx_process_exit_fun_t exit_fun = {fun, data};
840 process->on_exit.push_back(exit_fun);
844 * \brief Sets the auto-restart status of the process.
845 * If set to 1, the process will be automatically restarted when its host
848 void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart) {
849 process->auto_restart = auto_restart;
852 smx_actor_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_actor_t process) {
853 return SIMIX_process_restart(process, simcall->issuer);
855 /** @brief Restart a process, starting it again from the beginning. */
856 smx_actor_t SIMIX_process_restart(smx_actor_t process, smx_actor_t issuer) {
857 XBT_DEBUG("Restarting process %s on %s", process->cname(), process->host->getCname());
859 //retrieve the arguments of the old process
860 //FIXME: Factorize this with SIMIX_host_add_auto_restart_process ?
861 simgrid::simix::ProcessArg arg;
862 arg.name = process->name;
863 arg.code = process->code;
864 arg.host = process->host;
865 arg.kill_time = SIMIX_timer_get_date(process->kill_timer);
866 arg.data = process->data;
867 arg.properties = nullptr;
868 arg.auto_restart = process->auto_restart;
870 //kill the old process
871 SIMIX_process_kill(process, issuer);
873 //start the new process
874 smx_actor_t actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
875 arg.properties, nullptr);
876 if (arg.kill_time >= 0)
877 simcall_process_set_kill_time(actor, arg.kill_time);
878 if (arg.auto_restart)
879 simcall_process_auto_restart_set(actor, arg.auto_restart);
885 * \ingroup simix_process_management
886 * \brief Creates and runs a new SIMIX process.
888 * The structure and the corresponding thread are created and put in the list of ready processes.
890 * \param name a name for the process. It is for user-level information and can be nullptr.
891 * \param code the main function of the process
892 * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can be nullptr.
893 * It can be retrieved with the function \ref simcall_process_get_data.
894 * \param host where the new agent is executed.
895 * \param kill_time time when the process is killed
896 * \param argc first argument passed to \a code
897 * \param argv second argument passed to \a code
898 * \param properties the properties of the process
899 * \param auto_restart either it is autorestarting or not.
902 smx_actor_t simcall_process_create(const char* name, xbt_main_func_t code, void* data, sg_host_t host, int argc,
903 char** argv, xbt_dict_t properties)
907 auto wrapped_code = simgrid::xbt::wrapMain(code, argc, argv);
908 for (int i = 0; i != argc; ++i)
911 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
915 smx_actor_t simcall_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
916 xbt_dict_t properties)
920 smx_actor_t self = SIMIX_process_self();
921 return simgrid::simix::kernelImmediate([name, code, data, host, properties, self] {
922 return SIMIX_process_create(name, std::move(code), data, host, properties, self);