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;
41 /** Increase the refcount for this process */
42 smx_actor_t SIMIX_process_ref(smx_actor_t process)
44 if (process != nullptr)
45 intrusive_ptr_add_ref(process);
49 /** Decrease the refcount for this process */
50 void SIMIX_process_unref(smx_actor_t process)
52 if (process != nullptr)
53 intrusive_ptr_release(process);
57 * \brief Returns the current agent.
59 * This functions returns the currently running SIMIX process.
61 * \return The SIMIX process
63 smx_actor_t SIMIX_process_self()
65 smx_context_t self_context = SIMIX_context_self();
67 return (self_context != nullptr) ? self_context->process() : nullptr;
71 * \brief Returns whether a process has pending asynchronous communications.
72 * \return true if there are asynchronous communications in this process
74 int SIMIX_process_has_pending_comms(smx_actor_t process) {
76 return process->comms.size() > 0;
80 * \brief Moves a process to the list of processes to destroy.
82 void SIMIX_process_cleanup(smx_actor_t process)
84 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p", process->name.c_str(), process, process->waiting_synchro);
86 process->finished = true;
87 SIMIX_process_on_exit_runall(process);
89 /* Unregister from the kill timer if any */
90 if (process->kill_timer != nullptr)
91 SIMIX_timer_remove(process->kill_timer);
93 xbt_os_mutex_acquire(simix_global->mutex);
95 /* cancel non-blocking communications */
96 smx_activity_t synchro = static_cast<smx_activity_t>(process->comms.front());
97 while (not process->comms.empty()) {
98 simgrid::kernel::activity::CommImplPtr comm =
99 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
101 /* make sure no one will finish the comm after this process is destroyed,
102 * because src_proc or dst_proc would be an invalid pointer */
104 if (comm->src_proc == process) {
105 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
106 comm, comm->detached, (int)comm->state, comm->src_proc, comm->dst_proc);
107 comm->src_proc = nullptr;
109 /* I'm not supposed to destroy a detached comm from the sender side, */
111 XBT_DEBUG("Don't destroy it since it's a detached comm and I'm the sender");
114 } else if (comm->dst_proc == process) {
115 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
116 comm, (int)comm->state, comm->src_proc, comm->dst_proc);
117 comm->dst_proc = nullptr;
119 if (comm->detached && comm->src_proc != nullptr) {
120 /* the comm will be freed right now, remove it from the sender */
121 comm->src_proc->comms.remove(comm);
124 xbt_die("Communication synchro %p is in my list but I'm not the sender nor the receiver", synchro);
126 process->comms.pop_front();
127 synchro = static_cast<smx_activity_t>(process->comms.front());
131 XBT_DEBUG("%p should not be run anymore",process);
132 simix_global->process_list.erase(process->pid);
134 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
135 xbt_swag_insert(process, simix_global->process_to_destroy);
136 process->context->iwannadie = 0;
138 xbt_os_mutex_release(simix_global->mutex);
144 * Should be called some time to time to free the memory allocated for processes that have finished (or killed).
146 void SIMIX_process_empty_trash()
148 smx_actor_t process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
151 XBT_DEBUG("Getting rid of %p",process);
152 intrusive_ptr_release(process);
153 process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
160 ActorImpl::~ActorImpl()
162 delete this->context;
163 xbt_dict_free(&this->properties);
166 static int dying_daemon(void* exit_status, void* data)
168 std::vector<ActorImpl*>* vect = &simix_global->daemons;
170 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
171 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
173 /* Don't move the whole content since we don't really care about the order */
174 std::swap(*it, vect->back());
179 /** This process will be terminated automatically when the last non-daemon process finishes */
180 void ActorImpl::daemonize()
184 simix_global->daemons.push_back(this);
185 SIMIX_process_on_exit(this, dying_daemon, this);
189 /** Whether this process is daemonized */
190 bool ActorImpl::isDaemon()
195 void create_maestro(std::function<void()> code)
197 smx_actor_t maestro = nullptr;
198 /* Create maestro process and initialize it */
199 maestro = new simgrid::simix::ActorImpl();
200 maestro->pid = simix_process_maxpid++;
202 maestro->data = nullptr;
205 maestro->context = SIMIX_context_new(std::function<void()>(), nullptr, maestro);
207 if (not simix_global)
208 xbt_die("simix is not initialized, please call MSG_init first");
210 simix_global->context_factory->create_maestro(code, maestro);
213 maestro->simcall.issuer = maestro;
214 simix_global->maestro_process = maestro;
220 /** @brief Creates and runs the maestro process */
221 void SIMIX_maestro_create(void (*code)(void*), void* data)
223 simgrid::simix::create_maestro(std::bind(code, data));
227 * \brief Internal function to create a process.
229 * This function actually creates the process.
230 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
231 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
233 * \return the process created
235 smx_actor_t SIMIX_process_create(const char* name, std::function<void()> code, void* data, simgrid::s4u::Host* host,
236 xbt_dict_t properties, smx_actor_t parent_process)
239 XBT_DEBUG("Start process %s on host '%s'", name, host->cname());
242 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, host->cname());
246 smx_actor_t process = new simgrid::simix::ActorImpl();
248 xbt_assert(code && host != nullptr, "Invalid parameters");
250 process->pid = simix_process_maxpid++;
251 process->name = simgrid::xbt::string(name);
252 process->host = host;
253 process->data = data;
254 process->simcall.issuer = process;
256 if (parent_process != nullptr) {
257 process->ppid = parent_process->pid;
258 /* SMPI process have their own data segment and each other inherit from their father */
260 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
261 if (parent_process->pid != 0) {
262 SIMIX_segment_index_set(process, parent_process->segment_index);
264 SIMIX_segment_index_set(process, process->pid - 1);
270 process->code = code;
272 XBT_VERB("Create context %s", process->name.c_str());
273 process->context = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
276 process->properties = properties;
278 /* Make sure that the process is initialized for simix, in case we are called from the Host::onCreation signal */
279 if (host->extension<simgrid::simix::Host>() == nullptr)
280 host->extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
282 /* Add the process to its host process list */
283 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
285 XBT_DEBUG("Start context '%s'", process->name.c_str());
287 /* Now insert it in the global process list and in the process to run list */
288 simix_global->process_list[process->pid] = process;
289 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
290 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
291 intrusive_ptr_add_ref(process);
293 /* Tracing the process creation */
294 TRACE_msg_process_create(process->cname(), process->pid, process->host);
299 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname, xbt_dict_t properties,
300 smx_actor_t parent_process)
302 // This is mostly a copy/paste from SIMIX_process_new(),
303 // it'd be nice to share some code between those two functions.
305 sg_host_t host = sg_host_by_name(hostname);
306 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
309 XBT_WARN("Cannot launch process '%s' on failed host '%s'",
314 smx_actor_t process = new simgrid::simix::ActorImpl();
316 process->pid = simix_process_maxpid++;
317 process->name = std::string(name);
318 process->host = host;
319 process->data = data;
320 process->simcall.issuer = process;
322 if (parent_process != nullptr) {
323 process->ppid = parent_process->pid;
324 /* SMPI process have their own data segment and each other inherit from their father */
326 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
327 if (parent_process->pid != 0) {
328 SIMIX_segment_index_set(process, parent_process->segment_index);
330 SIMIX_segment_index_set(process, process->pid - 1);
336 /* Process data for auto-restart */
337 process->code = nullptr;
339 XBT_VERB("Create context %s", process->name.c_str());
340 if (not simix_global)
341 xbt_die("simix is not initialized, please call MSG_init first");
342 process->context = simix_global->context_factory->attach(
343 simix_global->cleanup_process_function, process);
346 process->properties = properties;
348 /* Add the process to it's host process list */
349 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
351 /* Now insert it in the global process list and in the process to run list */
352 simix_global->process_list[process->pid] = process;
353 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
354 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
356 /* Tracing the process creation */
357 TRACE_msg_process_create(process->cname(), process->pid, process->host);
359 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context);
361 xbt_die("Not a suitable context");
363 context->attach_start();
367 void SIMIX_process_detach()
369 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
371 xbt_die("Not a suitable context");
373 simix_global->cleanup_process_function(context->process());
375 // Let maestro ignore we are still alive:
376 // xbt_swag_remove(context->process(), simix_global->process_list);
378 // TODO, Remove from proces list:
379 // xbt_swag_remove(process, sg_host_simix(host)->process_list);
381 context->attach_stop();
386 * \brief Executes the processes from simix_global->process_to_run.
388 * The processes of simix_global->process_to_run are run (in parallel if
389 * possible). On exit, simix_global->process_to_run is empty, and
390 * simix_global->process_that_ran contains the list of processes that just ran.
391 * The two lists are swapped so, be careful when using them before and after a
392 * call to this function.
394 void SIMIX_process_runall()
396 SIMIX_context_runall();
398 xbt_dynar_t tmp = simix_global->process_that_ran;
399 simix_global->process_that_ran = simix_global->process_to_run;
400 simix_global->process_to_run = tmp;
401 xbt_dynar_reset(simix_global->process_to_run);
404 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_actor_t process) {
405 SIMIX_process_kill(process, simcall->issuer);
408 * \brief Internal function to kill a SIMIX process.
410 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
411 * or directly for SIMIX internal purposes.
413 * \param process poor victim
414 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
416 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
418 XBT_DEBUG("Killing process %s@%s", process->cname(), process->host->cname());
420 process->context->iwannadie = 1;
421 process->blocked = 0;
422 process->suspended = 0;
423 process->exception = nullptr;
425 /* destroy the blocking synchro if any */
426 if (process->waiting_synchro) {
428 simgrid::kernel::activity::ExecImplPtr exec =
429 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
430 simgrid::kernel::activity::CommImplPtr comm =
431 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
432 simgrid::kernel::activity::SleepImplPtr sleep =
433 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
434 simgrid::kernel::activity::RawImplPtr raw =
435 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
436 simgrid::kernel::activity::IoImplPtr io =
437 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
439 if (exec != nullptr) {
442 } else if (comm != nullptr) {
443 process->comms.remove(process->waiting_synchro);
445 // Remove first occurrence of &process->simcall:
446 auto i = boost::range::find(process->waiting_synchro->simcalls, &process->simcall);
447 if (i != process->waiting_synchro->simcalls.end())
448 process->waiting_synchro->simcalls.remove(&process->simcall);
450 } else if (sleep != nullptr) {
451 SIMIX_process_sleep_destroy(process->waiting_synchro);
453 } else if (raw != nullptr) {
454 SIMIX_synchro_stop_waiting(process, &process->simcall);
455 process->waiting_synchro->unref();
457 } else if (io != nullptr) {
458 SIMIX_io_destroy(process->waiting_synchro);
462 switch (process->waiting_synchro->type) {
463 case SIMIX_SYNC_JOIN:
464 SIMIX_process_sleep_destroy(process->waiting_synchro);
468 process->waiting_synchro = nullptr;
470 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
471 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
472 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
476 /** @brief Ask another process to raise the given exception
478 * @param process The process that should raise that exception
479 * @param cat category of exception
480 * @param value value associated to the exception
481 * @param msg string information associated to the exception
483 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
484 SMX_EXCEPTION(process, cat, value, msg);
486 if (process->suspended)
487 SIMIX_process_resume(process);
489 /* cancel the blocking synchro if any */
490 if (process->waiting_synchro) {
492 simgrid::kernel::activity::ExecImplPtr exec =
493 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
494 if (exec != nullptr) {
495 SIMIX_execution_cancel(process->waiting_synchro);
498 simgrid::kernel::activity::CommImplPtr comm =
499 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
500 if (comm != nullptr) {
501 process->comms.remove(comm);
505 simgrid::kernel::activity::SleepImplPtr sleep =
506 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
507 if (sleep != nullptr) {
508 SIMIX_process_sleep_destroy(process->waiting_synchro);
509 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self()) {
510 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
511 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
515 simgrid::kernel::activity::RawImplPtr raw =
516 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
517 if (raw != nullptr) {
518 SIMIX_synchro_stop_waiting(process, &process->simcall);
521 simgrid::kernel::activity::IoImplPtr io =
522 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(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 (not 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, void* synchro)
705 simgrid::kernel::activity::SleepImpl* sleep = static_cast<simgrid::kernel::activity::SleepImpl*>(synchro);
707 if (sleep->surf_sleep) {
708 sleep->surf_sleep->cancel();
710 while (not sleep->simcalls.empty()) {
711 smx_simcall_t simcall = sleep->simcalls.front();
712 sleep->simcalls.pop_front();
713 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
714 simcall->issuer->waiting_synchro = nullptr;
715 if (simcall->issuer->suspended) {
716 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
717 simcall->issuer->suspended = 0;
718 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
720 SIMIX_simcall_answer(simcall);
723 sleep->surf_sleep->unref();
724 sleep->surf_sleep = nullptr;
727 // intrusive_ptr_release(process); // FIXME: We are leaking here. See comment in SIMIX_process_join()
731 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
733 smx_activity_t res = SIMIX_process_sleep(issuer, timeout);
735 /* We are leaking the process here, but if we don't take the ref, we get a "use after free".
736 * The correct solution would be to derivate the type SynchroSleep into a SynchroProcessJoin,
737 * but the code is not clean enough for now for this.
738 * The C API should first be properly replaced with the C++ one, which is a fair amount of work.
740 intrusive_ptr_add_ref(process);
741 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, &*res);
745 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
747 if (MC_is_active() || MC_record_replay_is_active()) {
748 MC_process_clock_add(simcall->issuer, duration);
749 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
750 SIMIX_simcall_answer(simcall);
753 smx_activity_t sync = SIMIX_process_sleep(simcall->issuer, duration);
754 sync->simcalls.push_back(simcall);
755 simcall->issuer->waiting_synchro = sync;
758 smx_activity_t SIMIX_process_sleep(smx_actor_t process, double duration)
760 sg_host_t host = process->host;
763 THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->cname());
765 simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
766 synchro->host = host;
767 synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
768 synchro->surf_sleep->setData(synchro);
769 XBT_DEBUG("Create sleep synchronization %p", synchro);
774 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
776 XBT_DEBUG("Destroy synchro %p", synchro);
777 simgrid::kernel::activity::SleepImplPtr sleep =
778 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(synchro);
780 if (sleep->surf_sleep) {
781 sleep->surf_sleep->unref();
782 sleep->surf_sleep = nullptr;
787 * \brief Calling this function makes the process to yield.
789 * Only the current process can call this function, giving back the control to
792 * \param self the current process
794 void SIMIX_process_yield(smx_actor_t self)
796 XBT_DEBUG("Yield actor '%s'", self->cname());
798 /* Go into sleep and return control to maestro */
799 self->context->suspend();
801 /* Ok, maestro returned control to us */
802 XBT_DEBUG("Control returned to me: '%s'", self->name.c_str());
804 if (self->new_host) {
805 SIMIX_process_change_host(self, self->new_host);
806 self->new_host = nullptr;
809 if (self->context->iwannadie){
810 XBT_DEBUG("I wanna die!");
811 self->finished = true;
812 /* execute the on_exit functions */
813 SIMIX_process_on_exit_runall(self);
814 /* Add the process to the list of process to restart, only if the host is down */
815 if (self->auto_restart && self->host->isOff()) {
816 SIMIX_host_add_auto_restart_process(self->host, self->cname(),
817 self->code, self->data,
818 SIMIX_timer_get_date(self->kill_timer),
822 XBT_DEBUG("Process %s@%s is dead", self->cname(), self->host->cname());
823 self->context->stop();
826 if (self->suspended) {
827 XBT_DEBUG("Hey! I'm suspended.");
828 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
830 SIMIX_process_suspend(self, self);
833 if (self->exception != nullptr) {
834 XBT_DEBUG("Wait, maestro left me an exception");
835 std::exception_ptr exception = std::move(self->exception);
836 self->exception = nullptr;
837 std::rethrow_exception(std::move(exception));
840 if(SMPI_switch_data_segment && self->segment_index != -1){
841 SMPI_switch_data_segment(self->segment_index);
845 /* callback: termination */
846 void SIMIX_process_exception_terminate(xbt_ex_t * e)
852 smx_context_t SIMIX_process_get_context(smx_actor_t p) {
856 void SIMIX_process_set_context(smx_actor_t p,smx_context_t c) {
861 * \brief Returns the list of processes to run.
863 xbt_dynar_t SIMIX_process_get_runnable()
865 return simix_global->process_to_run;
869 * \brief Returns the process from PID.
871 smx_actor_t SIMIX_process_from_PID(aid_t PID)
873 if (simix_global->process_list.find(PID) == simix_global->process_list.end())
875 return simix_global->process_list.at(PID);
878 /** @brief returns a dynar containing all currently existing processes */
879 xbt_dynar_t SIMIX_processes_as_dynar() {
880 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t),nullptr);
881 for (auto kv : simix_global->process_list) {
882 smx_actor_t proc = kv.second;
883 xbt_dynar_push(res,&proc);
888 void SIMIX_process_on_exit_runall(smx_actor_t process) {
889 s_smx_process_exit_fun_t exit_fun;
890 smx_process_exit_status_t exit_status = (process->context->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
891 while (not process->on_exit.empty()) {
892 exit_fun = process->on_exit.back();
893 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
894 process->on_exit.pop_back();
898 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void *data) {
899 xbt_assert(process, "current process not found: are you in maestro context ?");
901 s_smx_process_exit_fun_t exit_fun = {fun, data};
903 process->on_exit.push_back(exit_fun);
907 * \brief Sets the auto-restart status of the process.
908 * If set to 1, the process will be automatically restarted when its host
911 void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart) {
912 process->auto_restart = auto_restart;
915 smx_actor_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_actor_t process) {
916 return SIMIX_process_restart(process, simcall->issuer);
918 /** @brief Restart a process, starting it again from the beginning. */
919 smx_actor_t SIMIX_process_restart(smx_actor_t process, smx_actor_t issuer) {
920 XBT_DEBUG("Restarting process %s on %s", process->cname(), process->host->cname());
922 //retrieve the arguments of the old process
923 //FIXME: Factorize this with SIMIX_host_add_auto_restart_process ?
924 simgrid::simix::ProcessArg arg;
925 arg.name = process->name;
926 arg.code = process->code;
927 arg.host = process->host;
928 arg.kill_time = SIMIX_timer_get_date(process->kill_timer);
929 arg.data = process->data;
930 arg.properties = nullptr;
931 arg.auto_restart = process->auto_restart;
933 //kill the old process
934 SIMIX_process_kill(process, issuer);
936 //start the new process
937 smx_actor_t actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
938 arg.properties, nullptr);
939 if (arg.kill_time >= 0)
940 simcall_process_set_kill_time(actor, arg.kill_time);
941 if (arg.auto_restart)
942 simcall_process_auto_restart_set(actor, arg.auto_restart);
947 void SIMIX_segment_index_set(smx_actor_t proc, int index){
948 proc->segment_index = index;
952 * \ingroup simix_process_management
953 * \brief Creates and runs a new SIMIX process.
955 * The structure and the corresponding thread are created and put in the list of ready processes.
957 * \param name a name for the process. It is for user-level information and can be nullptr.
958 * \param code the main function of the process
959 * \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.
960 * It can be retrieved with the function \ref simcall_process_get_data.
961 * \param host where the new agent is executed.
962 * \param kill_time time when the process is killed
963 * \param argc first argument passed to \a code
964 * \param argv second argument passed to \a code
965 * \param properties the properties of the process
966 * \param auto_restart either it is autorestarting or not.
968 smx_actor_t simcall_process_create(const char* name, xbt_main_func_t code, void* data, sg_host_t host, int argc,
969 char** argv, xbt_dict_t properties)
973 auto wrapped_code = simgrid::xbt::wrapMain(code, argc, argv);
974 for (int i = 0; i != argc; ++i)
977 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
981 smx_actor_t simcall_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
982 xbt_dict_t properties)
986 smx_actor_t self = SIMIX_process_self();
987 return simgrid::simix::kernelImmediate([name, code, data, host, properties, self] {
988 return SIMIX_process_create(name, std::move(code), data, host, properties, self);