1 /* Copyright (c) 2007-2015. 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. */
12 #include <boost/range/algorithm.hpp>
14 #include <xbt/functional.hpp>
16 #include <xbt/sysdep.h>
20 #include <simgrid/s4u/host.hpp>
24 #include "smx_private.h"
25 #include "src/kernel/activity/SynchroIo.hpp"
26 #include "src/kernel/activity/SynchroRaw.hpp"
27 #include "src/kernel/activity/SynchroSleep.hpp"
28 #include "src/mc/mc_replay.h"
29 #include "src/mc/remote/Client.hpp"
30 #include "src/msg/msg_private.h"
31 #include "src/surf/cpu_interface.hpp"
32 #include "src/surf/surf_interface.hpp"
35 #include "src/smpi/private.h"
38 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix, "Logging specific to SIMIX (process)");
40 unsigned long simix_process_maxpid = 0;
42 /** Increase the refcount for this process */
43 smx_actor_t SIMIX_process_ref(smx_actor_t process)
45 if (process != nullptr)
46 intrusive_ptr_add_ref(process);
50 /** Decrease the refcount for this process */
51 void SIMIX_process_unref(smx_actor_t process)
53 if (process != nullptr)
54 intrusive_ptr_release(process);
58 * \brief Returns the current agent.
60 * This functions returns the currently running SIMIX process.
62 * \return The SIMIX process
64 smx_actor_t SIMIX_process_self()
66 smx_context_t self_context = SIMIX_context_self();
68 return (self_context != nullptr) ? self_context->process() : nullptr;
72 * \brief Returns whether a process has pending asynchronous communications.
73 * \return true if there are asynchronous communications in this process
75 int SIMIX_process_has_pending_comms(smx_actor_t process) {
77 return process->comms.size() > 0;
81 * \brief Moves a process to the list of processes to destroy.
83 void SIMIX_process_cleanup(smx_actor_t process)
85 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p",
86 process->name.c_str(), process, process->waiting_synchro);
88 process->finished = true;
89 SIMIX_process_on_exit_runall(process);
91 /* Unregister from the kill timer if any */
92 if (process->kill_timer != nullptr)
93 SIMIX_timer_remove(process->kill_timer);
95 xbt_os_mutex_acquire(simix_global->mutex);
97 /* cancel non-blocking communications */
98 smx_activity_t synchro = static_cast<smx_activity_t>(process->comms.front());
99 while (!process->comms.empty()) {
100 simgrid::kernel::activity::Comm *comm = static_cast<simgrid::kernel::activity::Comm*>(synchro);
102 /* make sure no one will finish the comm after this process is destroyed,
103 * because src_proc or dst_proc would be an invalid pointer */
106 if (comm->src_proc == process) {
107 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
108 comm, comm->detached, (int)comm->state, comm->src_proc, comm->dst_proc);
109 comm->src_proc = nullptr;
111 /* I'm not supposed to destroy a detached comm from the sender side, */
113 XBT_DEBUG("Don't destroy it since it's a detached comm and I'm the sender");
118 else if (comm->dst_proc == process){
119 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
120 comm, (int)comm->state, comm->src_proc, comm->dst_proc);
121 comm->dst_proc = nullptr;
123 if (comm->detached && comm->src_proc != nullptr) {
124 /* the comm will be freed right now, remove it from the sender */
125 comm->src_proc->comms.remove(comm);
130 xbt_die("Communication synchro %p is in my list but I'm not the sender nor the receiver", synchro);
132 process->comms.pop_front();
133 synchro = static_cast<smx_activity_t>(process->comms.front());
136 XBT_DEBUG("%p should not be run anymore",process);
137 simix_global->process_list.erase(process->pid);
139 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
140 xbt_swag_insert(process, simix_global->process_to_destroy);
141 process->context->iwannadie = 0;
143 xbt_os_mutex_release(simix_global->mutex);
149 * Should be called some time to time to free the memory allocated for processes that have finished (or killed).
151 void SIMIX_process_empty_trash()
153 smx_actor_t process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
156 XBT_DEBUG("Getting rid of %p",process);
157 intrusive_ptr_release(process);
158 process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
165 ActorImpl::~ActorImpl()
167 delete this->context;
168 xbt_dict_free(&this->properties);
171 static int dying_daemon(void* exit_status, void* data)
173 std::vector<ActorImpl*>* vect = &simix_global->daemons;
175 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
176 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
178 /* Don't move the whole content since we don't really care about the order */
179 std::swap(*it, vect->back());
184 /** This process will be terminated automatically when the last non-daemon process finishes */
185 void ActorImpl::daemonize()
189 simix_global->daemons.push_back(this);
190 SIMIX_process_on_exit(this, dying_daemon, this);
194 /** Whether this process is daemonized */
195 bool ActorImpl::isDaemon()
200 void create_maestro(std::function<void()> code)
202 smx_actor_t maestro = nullptr;
203 /* Create maestro process and initialize it */
204 maestro = new simgrid::simix::ActorImpl();
205 maestro->pid = simix_process_maxpid++;
207 maestro->data = nullptr;
210 maestro->context = SIMIX_context_new(std::function<void()>(), nullptr, maestro);
213 xbt_die("simix is not initialized, please call MSG_init first");
215 simix_global->context_factory->create_maestro(code, maestro);
218 maestro->simcall.issuer = maestro;
219 simix_global->maestro_process = maestro;
225 /** @brief Creates and runs the maestro process */
226 void SIMIX_maestro_create(void (*code)(void*), void* data)
228 simgrid::simix::create_maestro(std::bind(code, data));
232 * \brief Internal function to create a process.
234 * This function actually creates the process.
235 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
236 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
238 * \return the process created
240 smx_actor_t SIMIX_process_create(
242 std::function<void()> code,
245 xbt_dict_t properties,
246 smx_actor_t parent_process)
249 XBT_DEBUG("Start process %s on host '%s'", name, host->cname());
252 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, host->cname());
256 smx_actor_t process = new simgrid::simix::ActorImpl();
258 xbt_assert(code && host != nullptr, "Invalid parameters");
260 process->pid = simix_process_maxpid++;
261 process->name = simgrid::xbt::string(name);
262 process->host = host;
263 process->data = data;
264 process->simcall.issuer = process;
266 if (parent_process != nullptr) {
267 process->ppid = parent_process->pid;
268 /* SMPI process have their own data segment and each other inherit from their father */
270 if (smpi_privatize_global_variables) {
271 if (parent_process->pid != 0) {
272 SIMIX_segment_index_set(process, parent_process->segment_index);
274 SIMIX_segment_index_set(process, process->pid - 1);
280 process->code = code;
282 XBT_VERB("Create context %s", process->name.c_str());
283 process->context = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
286 process->properties = properties;
288 /* Add the process to it's host process list */
289 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
291 XBT_DEBUG("Start context '%s'", process->name.c_str());
293 /* Now insert it in the global process list and in the process to run list */
294 simix_global->process_list[process->pid] = process;
295 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
296 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
298 /* Tracing the process creation */
299 TRACE_msg_process_create(process->cname(), process->pid, process->host);
304 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname, xbt_dict_t properties,
305 smx_actor_t parent_process)
307 // This is mostly a copy/paste from SIMIX_process_new(),
308 // it'd be nice to share some code between those two functions.
310 sg_host_t host = sg_host_by_name(hostname);
311 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
314 XBT_WARN("Cannot launch process '%s' on failed host '%s'",
319 smx_actor_t process = new simgrid::simix::ActorImpl();
321 process->pid = simix_process_maxpid++;
322 process->name = std::string(name);
323 process->host = host;
324 process->data = data;
325 process->simcall.issuer = process;
327 if (parent_process != nullptr) {
328 process->ppid = parent_process->pid;
329 /* SMPI process have their own data segment and each other inherit from their father */
331 if (smpi_privatize_global_variables) {
332 if (parent_process->pid != 0) {
333 SIMIX_segment_index_set(process, parent_process->segment_index);
335 SIMIX_segment_index_set(process, process->pid - 1);
341 /* Process data for auto-restart */
342 process->code = nullptr;
344 XBT_VERB("Create context %s", process->name.c_str());
346 xbt_die("simix is not initialized, please call MSG_init first");
347 process->context = simix_global->context_factory->attach(
348 simix_global->cleanup_process_function, process);
351 process->properties = properties;
353 /* Add the process to it's host process list */
354 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
356 /* Now insert it in the global process list and in the process to run list */
357 simix_global->process_list[process->pid] = process;
358 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
359 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
361 /* Tracing the process creation */
362 TRACE_msg_process_create(process->cname(), process->pid, process->host);
364 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context);
366 xbt_die("Not a suitable context");
368 context->attach_start();
372 void SIMIX_process_detach()
374 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
376 xbt_die("Not a suitable context");
378 simix_global->cleanup_process_function(context->process());
380 // Let maestro ignore we are still alive:
381 // xbt_swag_remove(context->process(), simix_global->process_list);
383 // TODO, Remove from proces list:
384 // xbt_swag_remove(process, sg_host_simix(host)->process_list);
386 context->attach_stop();
391 * \brief Executes the processes from simix_global->process_to_run.
393 * The processes of simix_global->process_to_run are run (in parallel if
394 * possible). On exit, simix_global->process_to_run is empty, and
395 * simix_global->process_that_ran contains the list of processes that just ran.
396 * The two lists are swapped so, be careful when using them before and after a
397 * call to this function.
399 void SIMIX_process_runall()
401 SIMIX_context_runall();
403 xbt_dynar_t tmp = simix_global->process_that_ran;
404 simix_global->process_that_ran = simix_global->process_to_run;
405 simix_global->process_to_run = tmp;
406 xbt_dynar_reset(simix_global->process_to_run);
409 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_actor_t process) {
410 SIMIX_process_kill(process, simcall->issuer);
413 * \brief Internal function to kill a SIMIX process.
415 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
416 * or directly for SIMIX internal purposes.
418 * \param process poor victim
419 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
421 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
423 XBT_DEBUG("Killing process %s@%s", process->cname(), process->host->cname());
425 process->context->iwannadie = 1;
426 process->blocked = 0;
427 process->suspended = 0;
428 process->exception = nullptr;
430 /* destroy the blocking synchro if any */
431 if (process->waiting_synchro) {
433 simgrid::kernel::activity::Exec *exec = dynamic_cast<simgrid::kernel::activity::Exec*>(process->waiting_synchro);
434 simgrid::kernel::activity::Comm *comm = dynamic_cast<simgrid::kernel::activity::Comm*>(process->waiting_synchro);
435 simgrid::kernel::activity::Sleep *sleep = dynamic_cast<simgrid::kernel::activity::Sleep*>(process->waiting_synchro);
436 simgrid::kernel::activity::Raw *raw = dynamic_cast<simgrid::kernel::activity::Raw*>(process->waiting_synchro);
437 simgrid::kernel::activity::Io *io = dynamic_cast<simgrid::kernel::activity::Io*>(process->waiting_synchro);
439 if (exec != nullptr) {
442 } else if (comm != nullptr) {
443 process->comms.remove(process->waiting_synchro);
446 // Remove first occurrence of &process->simcall:
447 auto i = boost::range::find(
448 process->waiting_synchro->simcalls,
450 if (i != process->waiting_synchro->simcalls.end())
451 process->waiting_synchro->simcalls.remove(&process->simcall);
455 } else if (sleep != nullptr) {
456 SIMIX_process_sleep_destroy(process->waiting_synchro);
458 } else if (raw != nullptr) {
459 SIMIX_synchro_stop_waiting(process, &process->simcall);
460 delete process->waiting_synchro;
462 } else if (io != nullptr) {
463 SIMIX_io_destroy(process->waiting_synchro);
467 switch (process->waiting_synchro->type) {
468 case SIMIX_SYNC_JOIN:
469 SIMIX_process_sleep_destroy(process->waiting_synchro);
473 process->waiting_synchro = nullptr;
475 if(!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
476 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
477 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
481 /** @brief Ask another process to raise the given exception
483 * @param process The process that should raise that exception
484 * @param cat category of exception
485 * @param value value associated to the exception
486 * @param msg string information associated to the exception
488 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
489 SMX_EXCEPTION(process, cat, value, msg);
491 if (process->suspended)
492 SIMIX_process_resume(process);
494 /* cancel the blocking synchro if any */
495 if (process->waiting_synchro) {
497 simgrid::kernel::activity::Exec *exec = dynamic_cast<simgrid::kernel::activity::Exec*>(process->waiting_synchro);
498 if (exec != nullptr) {
499 SIMIX_execution_cancel(process->waiting_synchro);
502 simgrid::kernel::activity::Comm *comm = dynamic_cast<simgrid::kernel::activity::Comm*>(process->waiting_synchro);
503 if (comm != nullptr) {
504 process->comms.remove(comm);
508 simgrid::kernel::activity::Sleep *sleep = dynamic_cast<simgrid::kernel::activity::Sleep*>(process->waiting_synchro);
509 if (sleep != nullptr) {
510 SIMIX_process_sleep_destroy(process->waiting_synchro);
511 if (!xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self()) {
512 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
513 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
517 simgrid::kernel::activity::Raw *raw = dynamic_cast<simgrid::kernel::activity::Raw*>(process->waiting_synchro);
518 if (raw != nullptr) {
519 SIMIX_synchro_stop_waiting(process, &process->simcall);
522 simgrid::kernel::activity::Io *io = dynamic_cast<simgrid::kernel::activity::Io*>(process->waiting_synchro);
524 SIMIX_io_destroy(process->waiting_synchro);
527 process->waiting_synchro = nullptr;
531 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
532 SIMIX_process_killall(simcall->issuer, reset_pid);
535 * \brief Kills all running processes.
536 * \param issuer this one will not be killed
538 void SIMIX_process_killall(smx_actor_t issuer, int reset_pid)
540 for (auto kv : simix_global->process_list)
541 if (kv.second != issuer)
542 SIMIX_process_kill(kv.second, issuer);
545 simix_process_maxpid = reset_pid;
547 SIMIX_context_runall();
549 SIMIX_process_empty_trash();
552 void simcall_HANDLER_process_set_host(smx_simcall_t simcall, smx_actor_t process, sg_host_t dest)
554 process->new_host = dest;
557 void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest)
559 xbt_assert((process != nullptr), "Invalid parameters");
560 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
561 process->host = dest;
562 xbt_swag_insert(process, dest->extension<simgrid::simix::Host>()->process_list);
566 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_actor_t process)
568 smx_activity_t sync_suspend = SIMIX_process_suspend(process, simcall->issuer);
570 if (process != simcall->issuer) {
571 SIMIX_simcall_answer(simcall);
573 sync_suspend->simcalls.push_back(simcall);
574 process->waiting_synchro = sync_suspend;
575 process->waiting_synchro->suspend();
577 /* If we are suspending ourselves, then just do not finish the simcall now */
580 smx_activity_t SIMIX_process_suspend(smx_actor_t process, smx_actor_t issuer)
582 if (process->suspended) {
583 XBT_DEBUG("Process '%s' is already suspended", process->name.c_str());
587 process->suspended = 1;
589 /* If we are suspending another process that is waiting on a sync, suspend its synchronization. */
590 if (process != issuer) {
592 if (process->waiting_synchro)
593 process->waiting_synchro->suspend();
594 /* If the other process is not waiting, its suspension is delayed to when the process is rescheduled. */
598 return SIMIX_execution_start(process, "suspend", 0.0, 1.0, 0.0);
602 void SIMIX_process_resume(smx_actor_t process)
604 XBT_IN("process = %p", process);
606 if (process->context->iwannadie) {
607 XBT_VERB("Ignoring request to suspend a process that is currently dying.");
611 if (!process->suspended)
613 process->suspended = 0;
615 /* resume the synchronization that was blocking the resumed process. */
616 if (process->waiting_synchro)
617 process->waiting_synchro->resume();
622 int SIMIX_process_get_maxpid() {
623 return simix_process_maxpid;
626 int SIMIX_process_count()
628 return simix_global->process_list.size();
631 int SIMIX_process_get_PID(smx_actor_t self)
639 void* SIMIX_process_self_get_data()
641 smx_actor_t self = SIMIX_process_self();
649 void SIMIX_process_self_set_data(void *data)
651 smx_actor_t self = SIMIX_process_self();
653 SIMIX_process_set_data(self, data);
656 void SIMIX_process_set_data(smx_actor_t process, void *data)
658 process->data = data;
661 /* needs to be public and without simcall because it is called
662 by exceptions and logging events */
663 const char* SIMIX_process_self_get_name() {
665 smx_actor_t process = SIMIX_process_self();
666 if (process == nullptr || process == simix_global->maestro_process)
669 return process->name.c_str();
672 smx_actor_t SIMIX_process_get_by_name(const char* name)
674 for (auto kv : simix_global->process_list)
675 if (kv.second->name == name)
680 int SIMIX_process_is_suspended(smx_actor_t process)
682 return process->suspended;
685 xbt_dict_t SIMIX_process_get_properties(smx_actor_t process)
687 return process->properties;
690 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_actor_t process, double timeout)
692 if (process->finished) {
693 // The joined process is already finished, just wake up the issuer process right away
694 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
695 SIMIX_simcall_answer(simcall);
698 smx_activity_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
699 sync->simcalls.push_back(simcall);
700 simcall->issuer->waiting_synchro = sync;
703 static int SIMIX_process_join_finish(smx_process_exit_status_t status, smx_activity_t synchro){
704 simgrid::kernel::activity::Sleep *sleep = static_cast<simgrid::kernel::activity::Sleep*>(synchro);
706 if (sleep->surf_sleep) {
707 sleep->surf_sleep->cancel();
709 while (!sleep->simcalls.empty()) {
710 smx_simcall_t simcall = sleep->simcalls.front();
711 sleep->simcalls.pop_front();
712 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
713 simcall->issuer->waiting_synchro = nullptr;
714 if (simcall->issuer->suspended) {
715 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
716 simcall->issuer->suspended = 0;
717 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
719 SIMIX_simcall_answer(simcall);
722 sleep->surf_sleep->unref();
723 sleep->surf_sleep = nullptr;
726 // intrusive_ptr_release(process); // FIXME: We are leaking here. See comment in SIMIX_process_join()
730 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
732 smx_activity_t res = SIMIX_process_sleep(issuer, timeout);
733 static_cast<simgrid::kernel::activity::ActivityImpl*>(res)->ref();
734 /* We are leaking the process here, but if we don't take the ref, we get a "use after free".
735 * The correct solution would be to derivate the type SynchroSleep into a SynchroProcessJoin,
736 * but the code is not clean enough for now for this.
737 * The C API should first be properly replaced with the C++ one, which is a fair amount of work.
739 intrusive_ptr_add_ref(process);
740 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, res);
744 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
746 if (MC_is_active() || MC_record_replay_is_active()) {
747 MC_process_clock_add(simcall->issuer, duration);
748 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
749 SIMIX_simcall_answer(simcall);
752 smx_activity_t sync = SIMIX_process_sleep(simcall->issuer, duration);
753 sync->simcalls.push_back(simcall);
754 simcall->issuer->waiting_synchro = sync;
757 smx_activity_t SIMIX_process_sleep(smx_actor_t process, double duration)
759 sg_host_t host = process->host;
762 THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->cname());
764 simgrid::kernel::activity::Sleep *synchro = new simgrid::kernel::activity::Sleep();
765 synchro->host = host;
766 synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
767 synchro->surf_sleep->setData(synchro);
768 XBT_DEBUG("Create sleep synchronization %p", synchro);
773 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
775 XBT_DEBUG("Destroy synchro %p", synchro);
776 simgrid::kernel::activity::Sleep *sleep = static_cast<simgrid::kernel::activity::Sleep*>(synchro);
778 if (sleep->surf_sleep) {
779 sleep->surf_sleep->unref();
780 sleep->surf_sleep = nullptr;
786 * \brief Calling this function makes the process to yield.
788 * Only the current process can call this function, giving back the control to
791 * \param self the current process
793 void SIMIX_process_yield(smx_actor_t self)
795 XBT_DEBUG("Yield actor '%s'", self->cname());
797 /* Go into sleep and return control to maestro */
798 self->context->suspend();
800 /* Ok, maestro returned control to us */
801 XBT_DEBUG("Control returned to me: '%s'", self->name.c_str());
803 if (self->new_host) {
804 SIMIX_process_change_host(self, self->new_host);
805 self->new_host = nullptr;
808 if (self->context->iwannadie){
809 XBT_DEBUG("I wanna die!");
810 self->finished = true;
811 /* execute the on_exit functions */
812 SIMIX_process_on_exit_runall(self);
813 /* Add the process to the list of process to restart, only if the host is down */
814 if (self->auto_restart && self->host->isOff()) {
815 SIMIX_host_add_auto_restart_process(self->host, self->cname(),
816 self->code, self->data,
817 SIMIX_timer_get_date(self->kill_timer),
821 XBT_DEBUG("Process %s@%s is dead", self->cname(), self->host->cname());
822 self->context->stop();
825 if (self->suspended) {
826 XBT_DEBUG("Hey! I'm suspended.");
827 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
829 SIMIX_process_suspend(self, self);
832 if (self->exception != nullptr) {
833 XBT_DEBUG("Wait, maestro left me an exception");
834 std::exception_ptr exception = std::move(self->exception);
835 self->exception = nullptr;
836 std::rethrow_exception(std::move(exception));
839 if(SMPI_switch_data_segment && self->segment_index != -1){
840 SMPI_switch_data_segment(self->segment_index);
844 /* callback: termination */
845 void SIMIX_process_exception_terminate(xbt_ex_t * e)
851 smx_context_t SIMIX_process_get_context(smx_actor_t p) {
855 void SIMIX_process_set_context(smx_actor_t p,smx_context_t c) {
860 * \brief Returns the list of processes to run.
862 xbt_dynar_t SIMIX_process_get_runnable()
864 return simix_global->process_to_run;
868 * \brief Returns the process from PID.
870 smx_actor_t SIMIX_process_from_PID(int PID)
872 if (simix_global->process_list.find(PID) == simix_global->process_list.end())
874 return simix_global->process_list.at(PID);
877 /** @brief returns a dynar containing all currently existing processes */
878 xbt_dynar_t SIMIX_processes_as_dynar() {
879 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t),nullptr);
880 for (auto kv : simix_global->process_list) {
881 smx_actor_t proc = kv.second;
882 xbt_dynar_push(res,&proc);
887 void SIMIX_process_on_exit_runall(smx_actor_t process) {
888 s_smx_process_exit_fun_t exit_fun;
889 smx_process_exit_status_t exit_status = (process->context->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
890 while (!process->on_exit.empty()) {
891 exit_fun = process->on_exit.back();
892 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
893 process->on_exit.pop_back();
897 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void *data) {
898 xbt_assert(process, "current process not found: are you in maestro context ?");
900 s_smx_process_exit_fun_t exit_fun = {fun, data};
902 process->on_exit.push_back(exit_fun);
906 * \brief Sets the auto-restart status of the process.
907 * If set to 1, the process will be automatically restarted when its host
910 void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart) {
911 process->auto_restart = auto_restart;
914 smx_actor_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_actor_t process) {
915 return SIMIX_process_restart(process, simcall->issuer);
917 /** @brief Restart a process, starting it again from the beginning. */
918 smx_actor_t SIMIX_process_restart(smx_actor_t process, smx_actor_t issuer) {
919 XBT_DEBUG("Restarting process %s on %s", process->cname(), process->host->cname());
921 //retrieve the arguments of the old process
922 //FIXME: Factorize this with SIMIX_host_add_auto_restart_process ?
923 simgrid::simix::ProcessArg arg;
924 arg.name = process->name;
925 arg.code = process->code;
926 arg.host = process->host;
927 arg.kill_time = SIMIX_timer_get_date(process->kill_timer);
928 arg.data = process->data;
929 arg.properties = nullptr;
930 arg.auto_restart = process->auto_restart;
932 //kill the old process
933 SIMIX_process_kill(process, issuer);
935 //start the new process
936 smx_actor_t actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
937 arg.properties, nullptr);
938 if (arg.kill_time >= 0)
939 simcall_process_set_kill_time(actor, arg.kill_time);
940 if (arg.auto_restart)
941 simcall_process_auto_restart_set(actor, arg.auto_restart);
946 void SIMIX_segment_index_set(smx_actor_t proc, int index){
947 proc->segment_index = index;
951 * \ingroup simix_process_management
952 * \brief Creates and runs a new SIMIX process.
954 * The structure and the corresponding thread are created and put in the list of ready processes.
956 * \param name a name for the process. It is for user-level information and can be nullptr.
957 * \param code the main function of the process
958 * \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.
959 * It can be retrieved with the function \ref simcall_process_get_data.
960 * \param host where the new agent is executed.
961 * \param kill_time time when the process is killed
962 * \param argc first argument passed to \a code
963 * \param argv second argument passed to \a code
964 * \param properties the properties of the process
965 * \param auto_restart either it is autorestarting or not.
967 smx_actor_t simcall_process_create(const char* name, xbt_main_func_t code, void* data, sg_host_t host, int argc,
968 char** argv, xbt_dict_t properties)
972 auto wrapped_code = simgrid::xbt::wrapMain(code, argc, argv);
973 for (int i = 0; i != argc; ++i)
976 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
980 smx_actor_t simcall_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
981 xbt_dict_t properties)
985 smx_actor_t self = SIMIX_process_self();
986 return simgrid::simix::kernelImmediate([name, code, data, host, properties, self] {
987 return SIMIX_process_create(name, std::move(code), data, host, properties, self);