1 /* Copyright (c) 2004-2019. 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. */
6 #include "simgrid/Exception.hpp"
9 #include "simgrid/s4u/Mailbox.hpp"
10 #include "src/instr/instr_private.hpp"
11 #include "src/kernel/activity/ExecImpl.hpp"
12 #include "src/msg/msg_private.hpp"
13 #include "src/simix/smx_private.hpp" /* MSG_task_listen looks inside the rdv directly. Not clean. */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "Logging specific to MSG (gos)");
18 * @brief Executes a task and waits for its termination.
20 * This function is used for describing the behavior of a process. It takes only one parameter.
21 * @param task a #msg_task_t to execute on the location on which the process is running.
22 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED or #MSG_HOST_FAILURE otherwise
24 msg_error_t MSG_task_execute(msg_task_t task)
26 return MSG_parallel_task_execute(task);
30 * @brief Executes a parallel task and waits for its termination.
32 * @param task a #msg_task_t to execute on the location on which the process is running.
34 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
35 * or #MSG_HOST_FAILURE otherwise
37 msg_error_t MSG_parallel_task_execute(msg_task_t task)
39 return MSG_parallel_task_execute_with_timeout(task, -1);
42 msg_error_t MSG_parallel_task_execute_with_timeout(msg_task_t task, double timeout)
44 simdata_task_t simdata = task->simdata;
45 e_smx_state_t comp_state;
46 msg_error_t status = MSG_OK;
49 xbt_assert((not simdata->compute) && not task->simdata->isused,
50 "This task is executed somewhere else. Go fix your code!");
52 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
54 if (simdata->flops_amount <= 0.0 && not simdata->host_nb) {
58 if (TRACE_actor_is_enabled())
59 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->push_event("execute");
64 if (simdata->host_nb > 0) {
66 boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(simcall_execution_parallel_start(
67 task->name ?: "", simdata->host_nb, simdata->host_list, simdata->flops_parallel_amount,
68 simdata->bytes_parallel_amount, -1.0, timeout));
69 XBT_DEBUG("Parallel execution action created: %p", simdata->compute.get());
70 if (task->category != nullptr)
71 simgrid::simix::simcall([task] { task->simdata->compute->set_category(task->category); });
73 sg_host_t host = MSG_process_get_host(MSG_process_self());
74 simdata->compute = simgrid::simix::simcall([task, host] {
75 return simgrid::kernel::activity::ExecImplPtr(
76 new simgrid::kernel::activity::ExecImpl(task->name ?: "", task->category ?: "",
77 /*timeout_detector*/ nullptr, host));
79 /* checking for infinite values */
80 xbt_assert(std::isfinite(simdata->flops_amount), "flops_amount is not finite!");
81 xbt_assert(std::isfinite(simdata->priority), "priority is not finite!");
83 simdata->compute->start(simdata->flops_amount, simdata->priority, simdata->bound);
86 comp_state = simcall_execution_wait(simdata->compute);
88 simdata->setNotUsed();
90 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
91 } catch (simgrid::HostFailureException& e) {
92 status = MSG_HOST_FAILURE;
93 } catch (simgrid::TimeoutError& e) {
95 } catch (simgrid::CancelException& e) {
96 status = MSG_TASK_CANCELED;
99 /* action ended, set comm and compute = nullptr, the actions is already destroyed in the main function */
100 simdata->flops_amount = 0.0;
101 simdata->comm = nullptr;
102 simdata->compute = nullptr;
104 if (TRACE_actor_is_enabled())
105 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->pop_event();
111 * @brief Receives a task from a mailbox.
113 * This is a blocking function, the execution flow will be blocked until the task is received. See #MSG_task_irecv
114 * for receiving tasks asynchronously.
116 * @param task a memory location for storing a #msg_task_t.
117 * @param alias name of the mailbox to receive the task from
120 * #MSG_OK if the task was successfully received,
121 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
123 msg_error_t MSG_task_receive(msg_task_t * task, const char *alias)
125 return MSG_task_receive_with_timeout(task, alias, -1);
129 * @brief Receives a task from a mailbox at a given rate.
131 * @param task a memory location for storing a #msg_task_t.
132 * @param alias name of the mailbox to receive the task from
133 * @param rate limit the reception to rate bandwidth (byte/sec)
135 * The rate parameter can be used to receive a task with a limited
136 * bandwidth (smaller than the physical available value). Use
137 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
138 * rate value do disable this feature).
141 * #MSG_OK if the task was successfully received,
142 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
144 msg_error_t MSG_task_receive_bounded(msg_task_t * task, const char *alias, double rate)
146 return MSG_task_receive_with_timeout_bounded(task, alias, -1, rate);
150 * @brief Receives a task from a mailbox with a given timeout.
152 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
153 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
154 * to obtain an infinite timeout.
156 * @param task a memory location for storing a #msg_task_t.
157 * @param alias name of the mailbox to receive the task from
158 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
161 * #MSG_OK if the task was successfully received,
162 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
164 msg_error_t MSG_task_receive_with_timeout(msg_task_t * task, const char *alias, double timeout)
166 return MSG_task_receive_ext(task, alias, timeout, nullptr);
170 * @brief Receives a task from a mailbox with a given timeout and at a given rate.
172 * @param task a memory location for storing a #msg_task_t.
173 * @param alias name of the mailbox to receive the task from
174 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
175 * @param rate limit the reception to rate bandwidth (byte/sec)
177 * The rate parameter can be used to send a task with a limited
178 * bandwidth (smaller than the physical available value). Use
179 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
180 * rate value do disable this feature).
183 * #MSG_OK if the task was successfully received,
184 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
186 msg_error_t MSG_task_receive_with_timeout_bounded(msg_task_t * task, const char *alias, double timeout,double rate)
188 return MSG_task_receive_ext_bounded(task, alias, timeout, nullptr, rate);
192 * @brief Receives a task from a mailbox from a specific host with a given timeout.
194 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
195 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
196 * to obtain an infinite timeout.
198 * @param task a memory location for storing a #msg_task_t.
199 * @param alias name of the mailbox to receive the task from
200 * @param timeout is the maximum wait time for completion (provide -1 for no timeout)
201 * @param host a #msg_host_t host from where the task was sent
204 * #MSG_OK if the task was successfully received,
205 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
207 msg_error_t MSG_task_receive_ext(msg_task_t * task, const char *alias, double timeout, msg_host_t host)
209 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
210 return MSG_task_receive_ext_bounded(task, alias, timeout, host, -1.0);
214 * @brief Receives a task from a mailbox from a specific host with a given timeout and at a given rate.
216 * @param task a memory location for storing a #msg_task_t.
217 * @param alias name of the mailbox to receive the task from
218 * @param timeout is the maximum wait time for completion (provide -1 for no timeout)
219 * @param host a #msg_host_t host from where the task was sent
220 * @param rate limit the reception to rate bandwidth (byte/sec)
222 * The rate parameter can be used to receive a task with a limited
223 * bandwidth (smaller than the physical available value). Use
224 * MSG_task_receive_ext() if you don't limit the rate (or pass -1 as a
225 * rate value do disable this feature).
228 * #MSG_OK if the task was successfully received,
229 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
231 msg_error_t MSG_task_receive_ext_bounded(msg_task_t * task, const char *alias, double timeout, msg_host_t host,
234 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
235 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
236 msg_error_t ret = MSG_OK;
237 /* We no longer support getting a task from a specific host */
241 TRACE_msg_task_get_start();
244 xbt_assert(task, "Null pointer for the task storage");
247 XBT_WARN("Asked to write the received task in a non empty struct -- proceeding.");
249 /* Try to receive it by calling SIMIX network layer */
251 simcall_comm_recv(MSG_process_self()->get_impl(), mailbox->get_impl(), task, nullptr, nullptr, nullptr, nullptr,
253 XBT_DEBUG("Got task %s from %s", (*task)->name, mailbox->get_cname());
254 (*task)->simdata->setNotUsed();
255 } catch (simgrid::HostFailureException& e) {
256 ret = MSG_HOST_FAILURE;
257 } catch (simgrid::TimeoutError& e) {
259 } catch (simgrid::CancelException& e) {
260 ret = MSG_HOST_FAILURE;
261 } catch (xbt_ex& e) {
262 if (e.category == network_error)
263 ret = MSG_TRANSFER_FAILURE;
268 if (ret != MSG_HOST_FAILURE && ret != MSG_TRANSFER_FAILURE && ret != MSG_TIMEOUT) {
269 TRACE_msg_task_get_end(*task);
274 /* Internal function used to factorize code between MSG_task_isend(), MSG_task_isend_bounded(), and MSG_task_dsend(). */
275 static inline msg_comm_t MSG_task_isend_internal(msg_task_t task, const char* alias,
276 void_f_pvoid_t cleanup, int detached)
278 simdata_task_t t_simdata = nullptr;
279 msg_process_t myself = MSG_process_self();
280 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
281 TRACE_msg_task_put_start(task);
283 /* Prepare the task to send */
284 t_simdata = task->simdata;
285 t_simdata->sender = myself;
286 t_simdata->source = MSG_host_self();
287 t_simdata->setUsed();
288 t_simdata->comm = nullptr;
289 msg_global->sent_msg++;
291 /* Send it by calling SIMIX network layer */
293 simcall_comm_isend(myself->get_impl(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
294 sizeof(void*), nullptr, cleanup, nullptr, nullptr, detached);
295 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(act);
297 msg_comm_t comm = nullptr;
299 comm = new simgrid::msg::Comm(task, nullptr, act);
302 if (TRACE_is_enabled() && task->category != nullptr)
303 simgrid::simix::simcall([act, task] { act->set_category(task->category); });
305 TRACE_msg_task_put_end();
311 * @brief Sends a task on a mailbox.
313 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
315 * @param task a #msg_task_t to send on another location.
316 * @param alias name of the mailbox to sent the task to
317 * @return the msg_comm_t communication created
319 msg_comm_t MSG_task_isend(msg_task_t task, const char *alias)
321 return MSG_task_isend_internal(task, alias, nullptr, 0);
325 * @brief Sends a task on a mailbox with a maximum rate
327 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication. The maxrate
328 * parameter allows the application to limit the bandwidth utilization of network links when sending the task.
330 * @param task a #msg_task_t to send on another location.
331 * @param alias name of the mailbox to sent the task to
332 * @param maxrate the maximum communication rate for sending this task (byte/sec).
333 * @return the msg_comm_t communication created
335 msg_comm_t MSG_task_isend_bounded(msg_task_t task, const char *alias, double maxrate)
337 task->simdata->rate = maxrate;
338 return MSG_task_isend_internal(task, alias, nullptr, 0);
342 * @brief Sends a task on a mailbox.
344 * This is a non blocking detached send function.
345 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
346 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
347 * usual. More details on this can be obtained on
348 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
349 * in the SimGrid-user mailing list archive.
351 * @param task a #msg_task_t to send on another location.
352 * @param alias name of the mailbox to sent the task to
353 * @param cleanup a function to destroy the task if the communication fails, e.g. MSG_task_destroy
354 * (if nullptr, no function will be called)
356 void MSG_task_dsend(msg_task_t task, const char *alias, void_f_pvoid_t cleanup)
358 msg_comm_t XBT_ATTRIB_UNUSED comm = MSG_task_isend_internal(task, alias, cleanup, 1);
359 xbt_assert(comm == nullptr);
363 * @brief Sends a task on a mailbox with a maximal rate.
365 * This is a non blocking detached send function.
366 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
367 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
368 * usual. More details on this can be obtained on
369 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
370 * in the SimGrid-user mailing list archive.
372 * The rate parameter can be used to send a task with a limited
373 * bandwidth (smaller than the physical available value). Use
374 * MSG_task_dsend() if you don't limit the rate (or pass -1 as a rate
375 * value do disable this feature).
377 * @param task a #msg_task_t to send on another location.
378 * @param alias name of the mailbox to sent the task to
379 * @param cleanup a function to destroy the task if the
380 * communication fails, e.g. MSG_task_destroy
381 * (if nullptr, no function will be called)
382 * @param maxrate the maximum communication rate for sending this task (byte/sec)
385 void MSG_task_dsend_bounded(msg_task_t task, const char *alias, void_f_pvoid_t cleanup, double maxrate)
387 task->simdata->rate = maxrate;
388 MSG_task_dsend(task, alias, cleanup);
392 * @brief Starts listening for receiving a task from an asynchronous communication.
394 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
396 * @param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
397 * @param name of the mailbox to receive the task on
398 * @return the msg_comm_t communication created
400 msg_comm_t MSG_task_irecv(msg_task_t *task, const char *name)
402 return MSG_task_irecv_bounded(task, name, -1.0);
406 * @brief Starts listening for receiving a task from an asynchronous communication at a given rate.
408 * The rate parameter can be used to receive a task with a limited
409 * bandwidth (smaller than the physical available value). Use
410 * MSG_task_irecv() if you don't limit the rate (or pass -1 as a rate
411 * value do disable this feature).
413 * @param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
414 * @param name of the mailbox to receive the task on
415 * @param rate limit the bandwidth to the given rate (byte/sec)
416 * @return the msg_comm_t communication created
418 msg_comm_t MSG_task_irecv_bounded(msg_task_t *task, const char *name, double rate)
420 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(name);
422 /* FIXME: these functions are not traceable */
424 xbt_assert(task, "Null pointer for the task storage");
427 XBT_CRITICAL("MSG_task_irecv() was asked to write in a non empty task struct.");
429 /* Try to receive it by calling SIMIX network layer */
430 msg_comm_t comm = new simgrid::msg::Comm(
432 simcall_comm_irecv(SIMIX_process_self(), mbox->get_impl(), task, nullptr, nullptr, nullptr, nullptr, rate));
438 * @brief Checks whether a communication is done, and if yes, finalizes it.
439 * @param comm the communication to test
440 * @return 'true' if the communication is finished
441 * (but it may have failed, use MSG_comm_get_status() to know its status)
442 * or 'false' if the communication is not finished yet
443 * If the status is 'false', don't forget to use MSG_process_sleep() after the test.
445 int MSG_comm_test(msg_comm_t comm)
447 bool finished = false;
450 finished = simcall_comm_test(comm->s_comm);
451 if (finished && comm->task_received != nullptr) {
452 /* I am the receiver */
453 (*comm->task_received)->simdata->setNotUsed();
455 } catch (simgrid::TimeoutError& e) {
456 comm->status = MSG_TIMEOUT;
460 if (e.category == network_error) {
461 comm->status = MSG_TRANSFER_FAILURE;
472 * @brief This function checks if a communication is finished.
473 * @param comms a vector of communications
474 * @return the position of the finished communication if any
475 * (but it may have failed, use MSG_comm_get_status() to know its status),
476 * or -1 if none is finished
478 int MSG_comm_testany(xbt_dynar_t comms)
480 int finished_index = -1;
482 /* Create the equivalent array with SIMIX objects: */
483 std::vector<simgrid::kernel::activity::ActivityImplPtr> s_comms;
484 s_comms.reserve(xbt_dynar_length(comms));
487 xbt_dynar_foreach(comms, cursor, comm) {
488 s_comms.push_back(comm->s_comm);
491 msg_error_t status = MSG_OK;
493 finished_index = simcall_comm_testany(s_comms.data(), s_comms.size());
494 } catch (simgrid::TimeoutError& e) {
495 finished_index = e.value;
496 status = MSG_TIMEOUT;
499 if (e.category != network_error)
501 finished_index = e.value;
502 status = MSG_TRANSFER_FAILURE;
505 if (finished_index != -1) {
506 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
507 /* the communication is finished */
508 comm->status = status;
510 if (status == MSG_OK && comm->task_received != nullptr) {
511 /* I am the receiver */
512 (*comm->task_received)->simdata->setNotUsed();
516 return finished_index;
519 /** @brief Destroys the provided communication. */
520 void MSG_comm_destroy(msg_comm_t comm)
525 /** @brief Wait for the completion of a communication.
527 * It takes two parameters.
528 * @param comm the communication to wait.
529 * @param timeout Wait until the communication terminates or the timeout occurs.
530 * You can provide a -1 timeout to obtain an infinite timeout.
531 * @return msg_error_t
533 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
536 simcall_comm_wait(comm->s_comm, timeout);
538 if (comm->task_received != nullptr) {
539 /* I am the receiver */
540 (*comm->task_received)->simdata->setNotUsed();
543 /* FIXME: these functions are not traceable */
544 } catch (simgrid::TimeoutError& e) {
545 comm->status = MSG_TIMEOUT;
548 if (e.category == network_error)
549 comm->status = MSG_TRANSFER_FAILURE;
557 /** @brief This function is called by a sender and permit to wait for each communication
559 * @param comm a vector of communication
560 * @param nb_elem is the size of the comm vector
561 * @param timeout for each call of MSG_comm_wait
563 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
565 for (int i = 0; i < nb_elem; i++)
566 MSG_comm_wait(comm[i], timeout);
569 /** @brief This function waits for the first communication finished in a list.
570 * @param comms a vector of communications
571 * @return the position of the first finished communication
572 * (but it may have failed, use MSG_comm_get_status() to know its status)
574 int MSG_comm_waitany(xbt_dynar_t comms)
576 int finished_index = -1;
578 /* create the equivalent dynar with SIMIX objects */
579 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(simgrid::kernel::activity::ActivityImpl*), nullptr);
582 xbt_dynar_foreach(comms, cursor, comm) {
583 xbt_dynar_push_as(s_comms, simgrid::kernel::activity::ActivityImpl*, comm->s_comm.get());
586 msg_error_t status = MSG_OK;
588 finished_index = simcall_comm_waitany(s_comms, -1);
589 } catch (simgrid::TimeoutError& e) {
590 finished_index = e.value;
591 status = MSG_TIMEOUT;
594 if (e.category == network_error) {
595 finished_index = e.value;
596 status = MSG_TRANSFER_FAILURE;
602 xbt_assert(finished_index != -1, "WaitAny returned -1");
603 xbt_dynar_free(&s_comms);
605 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
606 /* the communication is finished */
607 comm->status = status;
609 if (comm->task_received != nullptr) {
610 /* I am the receiver */
611 (*comm->task_received)->simdata->setNotUsed();
614 return finished_index;
618 * @brief Returns the error (if any) that occurred during a finished communication.
619 * @param comm a finished communication
620 * @return the status of the communication, or #MSG_OK if no error occurred
621 * during the communication
623 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
628 /** @brief Get a task (#msg_task_t) from a communication
630 * @param comm the communication where to get the task
631 * @return the task from the communication
633 msg_task_t MSG_comm_get_task(msg_comm_t comm)
635 xbt_assert(comm, "Invalid parameter");
637 return comm->task_received ? *comm->task_received : comm->task_sent;
641 * @brief This function is called by SIMIX in kernel mode to copy the data of a comm.
642 * @param comm the comm
643 * @param buff the data copied
644 * @param buff_size size of the buffer
646 void MSG_comm_copy_data_from_SIMIX(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
648 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
650 // notify the user callback if any
651 if (msg_global->task_copy_callback) {
652 msg_task_t task = static_cast<msg_task_t>(buff);
653 msg_global->task_copy_callback(task, comm->src_actor_->ciface(), comm->dst_actor_->ciface());
658 * @brief Sends a task to a mailbox
660 * This is a blocking function, the execution flow will be blocked until the task is sent (and received on the other
661 * side if #MSG_task_receive is used).
662 * See #MSG_task_isend for sending tasks asynchronously.
664 * @param task the task to be sent
665 * @param alias the mailbox name to where the task is sent
667 * @return Returns #MSG_OK if the task was successfully sent,
668 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
670 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
672 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
673 return MSG_task_send_with_timeout(task, alias, -1);
677 * @brief Sends a task to a mailbox with a maximum rate
679 * This is a blocking function, the execution flow will be blocked until the task is sent. The maxrate parameter allows
680 * the application to limit the bandwidth utilization of network links when sending the task.
682 * The maxrate parameter can be used to send a task with a limited
683 * bandwidth (smaller than the physical available value). Use
684 * MSG_task_send() if you don't limit the rate (or pass -1 as a rate
685 * value do disable this feature).
687 * @param task the task to be sent
688 * @param alias the mailbox name to where the task is sent
689 * @param maxrate the maximum communication rate for sending this task (byte/sec)
691 * @return Returns #MSG_OK if the task was successfully sent,
692 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
694 msg_error_t MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
696 task->simdata->rate = maxrate;
697 return MSG_task_send(task, alias);
701 * @brief Sends a task to a mailbox with a timeout
703 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
705 * @param task the task to be sent
706 * @param alias the mailbox name to where the task is sent
707 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
709 * @return Returns #MSG_OK if the task was successfully sent,
710 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
712 msg_error_t MSG_task_send_with_timeout(msg_task_t task, const char *alias, double timeout)
714 msg_error_t ret = MSG_OK;
715 simdata_task_t t_simdata = nullptr;
716 msg_process_t process = MSG_process_self();
717 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
719 TRACE_msg_task_put_start(task);
721 /* Prepare the task to send */
722 t_simdata = task->simdata;
723 t_simdata->sender = process;
724 t_simdata->source = MSG_host_self();
726 t_simdata->setUsed();
728 t_simdata->comm = nullptr;
729 msg_global->sent_msg++;
731 /* Try to send it by calling SIMIX network layer */
733 smx_activity_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simix call */
734 comm = simcall_comm_isend(SIMIX_process_self(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
735 sizeof(void*), nullptr, nullptr, nullptr, nullptr, 0);
736 if (TRACE_is_enabled() && task->category != nullptr)
737 simgrid::simix::simcall([comm, task] { comm->set_category(task->category); });
738 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(comm);
739 simcall_comm_wait(comm, timeout);
740 } catch (simgrid::TimeoutError& e) {
742 } catch (simgrid::CancelException& e) {
743 ret = MSG_HOST_FAILURE;
744 } catch (xbt_ex& e) {
745 if (e.category == network_error)
746 ret = MSG_TRANSFER_FAILURE;
750 /* If the send failed, it is not used anymore */
751 t_simdata->setNotUsed();
754 TRACE_msg_task_put_end();
759 * @brief Sends a task to a mailbox with a timeout and with a maximum rate
761 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
763 * The maxrate parameter can be used to send a task with a limited
764 * bandwidth (smaller than the physical available value). Use
765 * MSG_task_send_with_timeout() if you don't limit the rate (or pass -1 as a rate
766 * value do disable this feature).
768 * @param task the task to be sent
769 * @param alias the mailbox name to where the task is sent
770 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
771 * @param maxrate the maximum communication rate for sending this task (byte/sec)
773 * @return Returns #MSG_OK if the task was successfully sent,
774 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
776 msg_error_t MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias, double timeout, double maxrate)
778 task->simdata->rate = maxrate;
779 return MSG_task_send_with_timeout(task, alias, timeout);
783 * @brief Look if there is a communication on a mailbox and return the PID of the sender process.
785 * @param alias the name of the mailbox to be considered
787 * @return Returns the PID of sender process,
788 * -1 if there is no communication in the mailbox.
790 int MSG_task_listen_from(const char *alias)
792 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(alias);
793 simgrid::kernel::activity::CommImplPtr comm =
794 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(mbox->front());
799 return MSG_process_get_PID(static_cast<msg_task_t>(comm->src_buff_)->simdata->sender);
803 * @brief Sets the tracing category of a task.
805 * This function should be called after the creation of a MSG task, to define the category of that task. The
806 * first parameter task must contain a task that was created with the function #MSG_task_create. The second
807 * parameter category must contain a category that was previously declared with the function #TRACE_category
808 * (or with #TRACE_category_with_color).
810 * See @ref outcomes_vizu for details on how to trace the (categorized) resource utilization.
812 * @param task the task that is going to be categorized
813 * @param category the name of the category to be associated to the task
815 * @see MSG_task_get_category, TRACE_category, TRACE_category_with_color
817 void MSG_task_set_category (msg_task_t task, const char *category)
819 TRACE_msg_set_task_category (task, category);
823 * @brief Gets the current tracing category of a task.
825 * @param task the task to be considered
827 * @see MSG_task_set_category
829 * @return Returns the name of the tracing category of the given task, nullptr otherwise
831 const char *MSG_task_get_category (msg_task_t task)
833 return task->category;