1 /* Copyright (c) 2004-2016. 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 "src/simix/smx_private.h" /* MSG_task_listen looks inside the rdv directly. Not clean. */
7 #include "msg_private.h"
10 #include "xbt/sysdep.h"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
13 "Logging specific to MSG (gos)");
15 /** \ingroup msg_task_usage
16 * \brief Executes a task and waits for its termination.
18 * This function is used for describing the behavior of a process. It takes only one parameter.
19 * \param task a #msg_task_t to execute on the location on which the process is running.
20 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED or #MSG_HOST_FAILURE otherwise
22 msg_error_t MSG_task_execute(msg_task_t task)
24 /* TODO: add this to other locations */
25 msg_host_t host = MSG_process_get_host(MSG_process_self());
26 MSG_host_add_task(host, task);
28 msg_error_t ret = MSG_parallel_task_execute(task);
30 MSG_host_del_task(host, task);
35 /** \ingroup msg_task_usage
36 * \brief Executes a parallel task and waits for its termination.
38 * \param task a #msg_task_t to execute on the location on which the process is running.
40 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
41 * or #MSG_HOST_FAILURE otherwise
43 msg_error_t MSG_parallel_task_execute(msg_task_t task)
45 simdata_task_t simdata = task->simdata;
46 simdata_process_t p_simdata = (simdata_process_t) SIMIX_process_self_get_data();
47 e_smx_state_t comp_state;
48 msg_error_t status = MSG_OK;
50 TRACE_msg_task_execute_start(task);
52 xbt_assert((!simdata->compute) && !task->simdata->isused,
53 "This task is executed somewhere else. Go fix your code!");
55 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
57 if (simdata->flops_amount == 0 && !simdata->host_nb) {
58 TRACE_msg_task_execute_end(task);
65 if (simdata->host_nb > 0) {
66 simdata->compute = static_cast<simgrid::simix::Exec*>(
67 simcall_execution_parallel_start(task->name, simdata->host_nb,simdata->host_list,
68 simdata->flops_parallel_amount, simdata->bytes_parallel_amount,
70 XBT_DEBUG("Parallel execution action created: %p", simdata->compute);
72 unsigned long affinity_mask =
73 (unsigned long)(uintptr_t) xbt_dict_get_or_null_ext(simdata->affinity_mask_db, (char *) p_simdata->m_host,
75 XBT_DEBUG("execute %s@%s with affinity(0x%04lx)",
76 MSG_task_get_name(task), MSG_host_get_name(p_simdata->m_host), affinity_mask);
78 simdata->compute = static_cast<simgrid::simix::Exec*>(
79 simcall_execution_start(task->name, simdata->flops_amount, simdata->priority,
80 simdata->bound, affinity_mask));
82 simcall_set_category(simdata->compute, task->category);
83 p_simdata->waiting_action = simdata->compute;
84 comp_state = simcall_execution_wait(simdata->compute);
86 p_simdata->waiting_action = nullptr;
87 simdata->setNotUsed();
89 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
94 status = MSG_TASK_CANCELED;
97 status = MSG_HOST_FAILURE;
104 /* action ended, set comm and compute = nullptr, the actions is already destroyed in the main function */
105 simdata->flops_amount = 0.0;
106 simdata->comm = nullptr;
107 simdata->compute = nullptr;
108 TRACE_msg_task_execute_end(task);
113 /** \ingroup msg_task_usage
114 * \brief Sleep for the specified number of seconds
116 * Makes the current process sleep until \a time seconds have elapsed.
118 * \param nb_sec a number of second
120 msg_error_t MSG_process_sleep(double nb_sec)
122 msg_error_t status = MSG_OK;
123 /*msg_process_t proc = MSG_process_self();*/
125 TRACE_msg_process_sleep_in(MSG_process_self());
128 simcall_process_sleep(nb_sec);
131 switch (e.category) {
133 XBT_DEBUG("According to the JAVA API, a sleep call should only deal with HostFailureException, WTF here ?");
134 // adsein: MSG_TASK_CANCELED is assigned when someone kills the process that made the sleep, this is not
135 // correct. For instance, when the node is turned off, the error should be MSG_HOST_FAILURE, which is by the way
136 // and according to the JAVA document, the only exception that can be triggered by MSG_Process_sleep call.
137 // To avoid possible impacts in the code, I just raised a host_failure exception for the moment in the JAVA code
138 // and did not change anythings at the C level.
139 // See comment in the jmsg_process.c file, function JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
140 status = MSG_TASK_CANCELED;
147 TRACE_msg_process_sleep_out(MSG_process_self());
151 /** \ingroup msg_task_usage
152 * \brief Receives a task from a mailbox.
154 * This is a blocking function, the execution flow will be blocked until the task is received. See #MSG_task_irecv
155 * for receiving tasks asynchronously.
157 * \param task a memory location for storing a #msg_task_t.
158 * \param alias name of the mailbox to receive the task from
161 * #MSG_OK if the task was successfully received,
162 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
164 msg_error_t MSG_task_receive(msg_task_t * task, const char *alias)
166 return MSG_task_receive_with_timeout(task, alias, -1);
169 /** \ingroup msg_task_usage
170 * \brief Receives a task from a mailbox 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 rate limit the reception to rate bandwidth
177 * #MSG_OK if the task was successfully received,
178 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
180 msg_error_t MSG_task_receive_bounded(msg_task_t * task, const char *alias, double rate)
182 return MSG_task_receive_with_timeout_bounded(task, alias, -1, rate);
185 /** \ingroup msg_task_usage
186 * \brief Receives a task from a mailbox with a given timeout.
188 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
189 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
190 * to obtain an infinite timeout.
192 * \param task a memory location for storing a #msg_task_t.
193 * \param alias name of the mailbox to receive the task from
194 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
197 * #MSG_OK if the task was successfully received,
198 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
200 msg_error_t MSG_task_receive_with_timeout(msg_task_t * task, const char *alias, double timeout)
202 return MSG_task_receive_ext(task, alias, timeout, nullptr);
205 /** \ingroup msg_task_usage
206 * \brief Receives a task from a mailbox with a given timeout and at a given rate.
208 * \param task a memory location for storing a #msg_task_t.
209 * \param alias name of the mailbox to receive the task from
210 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
211 * \param rate limit the reception to rate bandwidth
214 * #MSG_OK if the task was successfully received,
215 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
217 msg_error_t MSG_task_receive_with_timeout_bounded(msg_task_t * task, const char *alias, double timeout,double rate)
219 return MSG_task_receive_ext_bounded(task, alias, timeout, nullptr, rate);
222 /** \ingroup msg_task_usage
223 * \brief Receives a task from a mailbox from a specific host with a given timeout.
225 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
226 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
227 * to obtain an infinite timeout.
229 * \param task a memory location for storing a #msg_task_t.
230 * \param alias name of the mailbox to receive the task from
231 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
232 * \param host a #msg_host_t host from where the task was sent
235 * #MSG_OK if the task was successfully received,
236 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
238 msg_error_t MSG_task_receive_ext(msg_task_t * task, const char *alias, double timeout, msg_host_t host)
240 msg_error_t ret = MSG_OK;
241 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
243 ret = MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task, host, timeout);
246 switch (e.category) {
247 case cancel_error: /* may be thrown by MSG_mailbox_get_by_alias */
248 ret = MSG_HOST_FAILURE;
257 /** \ingroup msg_task_usage
258 * \brief Receives a task from a mailbox from a specific host with a given timeout and at a given rate.
260 * \param task a memory location for storing a #msg_task_t.
261 * \param alias name of the mailbox to receive the task from
262 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
263 * \param host a #msg_host_t host from where the task was sent
264 * \param rate limit the reception to rate bandwidth
267 * #MSG_OK if the task was successfully received,
268 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
270 msg_error_t MSG_task_receive_ext_bounded(msg_task_t * task, const char *alias, double timeout, msg_host_t host,
273 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
274 return MSG_mailbox_get_task_ext_bounded(MSG_mailbox_get_by_alias(alias), task, host, timeout, rate);
277 /* Internal function used to factorize code between MSG_task_isend_with_matching() and MSG_task_dsend(). */
278 static inline msg_comm_t MSG_task_isend_internal(msg_task_t task, const char *alias,
279 int (*match_fun)(void*,void*, smx_synchro_t),
280 void *match_data, void_f_pvoid_t cleanup, int detached)
282 simdata_task_t t_simdata = nullptr;
283 msg_process_t process = MSG_process_self();
284 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
285 int call_end = TRACE_msg_task_put_start(task);
287 /* Prepare the task to send */
288 t_simdata = task->simdata;
289 t_simdata->sender = process;
290 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data())->m_host;
291 t_simdata->setUsed();
292 t_simdata->comm = nullptr;
293 msg_global->sent_msg++;
295 /* Send it by calling SIMIX network layer */
296 smx_synchro_t act = simcall_comm_isend(SIMIX_process_self(), mailbox, t_simdata->bytes_amount, t_simdata->rate,
297 task, sizeof(void *), match_fun, cleanup, nullptr, match_data,detached);
298 t_simdata->comm = static_cast<simgrid::simix::Comm*>(act); /* FIXME: is the field t_simdata->comm still useful? */
304 comm = xbt_new0(s_msg_comm_t, 1);
305 comm->task_sent = task;
306 comm->task_received = nullptr;
307 comm->status = MSG_OK;
311 if (TRACE_is_enabled())
312 simcall_set_category(act, task->category);
314 TRACE_msg_task_put_end();
319 /** \ingroup msg_task_usage
320 * \brief Sends a task on a mailbox.
322 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
324 * \param task a #msg_task_t to send on another location.
325 * \param alias name of the mailbox to sent the task to
326 * \return the msg_comm_t communication created
328 msg_comm_t MSG_task_isend(msg_task_t task, const char *alias)
330 return MSG_task_isend_internal(task, alias, nullptr, nullptr, nullptr, 0);
333 /** \ingroup msg_task_usage
334 * \brief Sends a task on a mailbox with a maximum rate
336 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication. The maxrate
337 * parameter allows the application to limit the bandwidth utilization of network links when sending the task.
339 * \param task a #msg_task_t to send on another location.
340 * \param alias name of the mailbox to sent the task to
341 * \param maxrate the maximum communication rate for sending this task .
342 * \return the msg_comm_t communication created
344 msg_comm_t MSG_task_isend_bounded(msg_task_t task, const char *alias, double maxrate)
346 task->simdata->rate = maxrate;
347 return MSG_task_isend_internal(task, alias, nullptr, nullptr, nullptr, 0);
350 /** \ingroup msg_task_usage
351 * \brief Sends a task on a mailbox, with support for matching requests
353 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
355 * \param task a #msg_task_t to send on another location.
356 * \param alias name of the mailbox to sent the task to
357 * \param match_fun boolean function which parameters are:
358 * - match_data_provided_here
359 * - match_data_provided_by_other_side_if_any
360 * - the_smx_synchro_describing_the_other_side
361 * \param match_data user provided data passed to match_fun
362 * \return the msg_comm_t communication created
364 msg_comm_t MSG_task_isend_with_matching(msg_task_t task, const char *alias,
365 int (*match_fun)(void*, void*, smx_synchro_t), void *match_data)
367 return MSG_task_isend_internal(task, alias, match_fun, match_data, nullptr, 0);
370 /** \ingroup msg_task_usage
371 * \brief Sends a task on a mailbox.
373 * This is a non blocking detached send function.
374 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
375 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
376 * usual. More details on this can be obtained on
377 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
378 * in the SimGrid-user mailing list archive.
380 * \param task a #msg_task_t to send on another location.
381 * \param alias name of the mailbox to sent the task to
382 * \param cleanup a function to destroy the task if the communication fails, e.g. MSG_task_destroy
383 * (if nullptr, no function will be called)
385 void MSG_task_dsend(msg_task_t task, const char *alias, void_f_pvoid_t cleanup)
387 MSG_task_isend_internal(task, alias, nullptr, nullptr, cleanup, 1);
390 /** \ingroup msg_task_usage
391 * \brief Sends a task on a mailbox with a maximal rate.
393 * This is a non blocking detached send function.
394 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
395 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
396 * usual. More details on this can be obtained on
397 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
398 * in the SimGrid-user mailing list archive.
400 * \param task a #msg_task_t to send on another location.
401 * \param alias name of the mailbox to sent the task to
402 * \param cleanup a function to destroy the task if the
403 * communication fails, e.g. MSG_task_destroy
404 * (if nullptr, no function will be called)
405 * \param maxrate the maximum communication rate for sending this task
408 void MSG_task_dsend_bounded(msg_task_t task, const char *alias, void_f_pvoid_t cleanup, double maxrate)
410 task->simdata->rate = maxrate;
411 MSG_task_dsend(task, alias, cleanup);
414 /** \ingroup msg_task_usage
415 * \brief Starts listening for receiving a task from an asynchronous communication.
417 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
419 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
420 * \param name of the mailbox to receive the task on
421 * \return the msg_comm_t communication created
423 msg_comm_t MSG_task_irecv(msg_task_t *task, const char *name)
425 return MSG_task_irecv_bounded(task, name, -1.0);
428 /** \ingroup msg_task_usage
429 * \brief Starts listening for receiving a task from an asynchronous communication at a given rate.
431 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
432 * \param name of the mailbox to receive the task on
433 * \param rate limit the bandwidth to the given rate
434 * \return the msg_comm_t communication created
436 msg_comm_t MSG_task_irecv_bounded(msg_task_t *task, const char *name, double rate)
438 smx_mailbox_t rdv = MSG_mailbox_get_by_alias(name);
440 /* FIXME: these functions are not traceable */
442 xbt_assert(task, "Null pointer for the task storage");
445 XBT_CRITICAL("MSG_task_irecv() was asked to write in a non empty task struct.");
447 /* Try to receive it by calling SIMIX network layer */
448 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
449 comm->task_sent = nullptr;
450 comm->task_received = task;
451 comm->status = MSG_OK;
452 comm->s_comm = simcall_comm_irecv(MSG_process_self(), rdv, task, nullptr, nullptr, nullptr, nullptr, rate);
457 /** \ingroup msg_task_usage
458 * \brief Checks whether a communication is done, and if yes, finalizes it.
459 * \param comm the communication to test
460 * \return TRUE if the communication is finished
461 * (but it may have failed, use MSG_comm_get_status() to know its status)
462 * or FALSE if the communication is not finished yet
463 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
465 int MSG_comm_test(msg_comm_t comm)
470 finished = simcall_comm_test(comm->s_comm);
471 if (finished && comm->task_received != nullptr) {
472 /* I am the receiver */
473 (*comm->task_received)->simdata->setNotUsed();
477 switch (e.category) {
479 comm->status = MSG_TRANSFER_FAILURE;
483 comm->status = MSG_TIMEOUT;
494 /** \ingroup msg_task_usage
495 * \brief This function checks if a communication is finished.
496 * \param comms a vector of communications
497 * \return the position of the finished communication if any
498 * (but it may have failed, use MSG_comm_get_status() to know its status),
499 * or -1 if none is finished
501 int MSG_comm_testany(xbt_dynar_t comms)
503 int finished_index = -1;
505 /* create the equivalent dynar with SIMIX objects */
506 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_synchro_t), nullptr);
509 xbt_dynar_foreach(comms, cursor, comm) {
510 xbt_dynar_push(s_comms, &comm->s_comm);
513 msg_error_t status = MSG_OK;
515 finished_index = simcall_comm_testany(s_comms);
518 switch (e.category) {
520 finished_index = e.value;
521 status = MSG_TRANSFER_FAILURE;
524 finished_index = e.value;
525 status = MSG_TIMEOUT;
531 xbt_dynar_free(&s_comms);
533 if (finished_index != -1) {
534 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
535 /* the communication is finished */
536 comm->status = status;
538 if (status == MSG_OK && comm->task_received != nullptr) {
539 /* I am the receiver */
540 (*comm->task_received)->simdata->setNotUsed();
544 return finished_index;
547 /** \ingroup msg_task_usage
548 * \brief Destroys a communication.
549 * \param comm the communication to destroy.
551 void MSG_comm_destroy(msg_comm_t comm)
556 /** \ingroup msg_task_usage
557 * \brief Wait for the completion of a communication.
559 * It takes two parameters.
560 * \param comm the communication to wait.
561 * \param timeout Wait until the communication terminates or the timeout occurs.
562 * You can provide a -1 timeout to obtain an infinite timeout.
563 * \return msg_error_t
565 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
568 simcall_comm_wait(comm->s_comm, timeout);
570 if (comm->task_received != nullptr) {
571 /* I am the receiver */
572 (*comm->task_received)->simdata->setNotUsed();
575 /* FIXME: these functions are not traceable */
578 switch (e.category) {
580 comm->status = MSG_TRANSFER_FAILURE;
583 comm->status = MSG_TIMEOUT;
593 /** \ingroup msg_task_usage
594 * \brief This function is called by a sender and permit to wait for each communication
596 * \param comm a vector of communication
597 * \param nb_elem is the size of the comm vector
598 * \param timeout for each call of MSG_comm_wait
600 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
603 for (i = 0; i < nb_elem; i++) {
604 MSG_comm_wait(comm[i], timeout);
608 /** \ingroup msg_task_usage
609 * \brief This function waits for the first communication finished in a list.
610 * \param comms a vector of communications
611 * \return the position of the first finished communication
612 * (but it may have failed, use MSG_comm_get_status() to know its status)
614 int MSG_comm_waitany(xbt_dynar_t comms)
616 int finished_index = -1;
618 /* create the equivalent dynar with SIMIX objects */
619 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_synchro_t), nullptr);
622 xbt_dynar_foreach(comms, cursor, comm) {
623 xbt_dynar_push(s_comms, &comm->s_comm);
626 msg_error_t status = MSG_OK;
628 finished_index = simcall_comm_waitany(s_comms);
631 switch (e.category) {
633 finished_index = e.value;
634 status = MSG_TRANSFER_FAILURE;
637 finished_index = e.value;
638 status = MSG_TIMEOUT;
645 xbt_assert(finished_index != -1, "WaitAny returned -1");
646 xbt_dynar_free(&s_comms);
648 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
649 /* the communication is finished */
650 comm->status = status;
652 if (comm->task_received != nullptr) {
653 /* I am the receiver */
654 (*comm->task_received)->simdata->setNotUsed();
657 return finished_index;
661 * \ingroup msg_task_usage
662 * \brief Returns the error (if any) that occurred during a finished communication.
663 * \param comm a finished communication
664 * \return the status of the communication, or #MSG_OK if no error occurred
665 * during the communication
667 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
672 /** \ingroup msg_task_usage
673 * \brief Get a task (#msg_task_t) from a communication
675 * \param comm the communication where to get the task
676 * \return the task from the communication
678 msg_task_t MSG_comm_get_task(msg_comm_t comm)
680 xbt_assert(comm, "Invalid parameter");
682 return comm->task_received ? *comm->task_received : comm->task_sent;
686 * \brief This function is called by SIMIX in kernel mode to copy the data of a comm.
687 * \param comm the comm
688 * \param buff the data copied
689 * \param buff_size size of the buffer
691 void MSG_comm_copy_data_from_SIMIX(smx_synchro_t synchro, void* buff, size_t buff_size)
693 simgrid::simix::Comm *comm = static_cast<simgrid::simix::Comm*>(synchro);
695 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
697 // notify the user callback if any
698 if (msg_global->task_copy_callback) {
699 msg_task_t task = (msg_task_t) buff;
700 msg_global->task_copy_callback(task, comm->src_proc, comm->dst_proc);
704 /** \ingroup msg_task_usage
705 * \brief Sends a task to a mailbox
707 * This is a blocking function, the execution flow will be blocked until the task is sent (and received on the other
708 * side if #MSG_task_receive is used).
709 * See #MSG_task_isend for sending tasks asynchronously.
711 * \param task the task to be sent
712 * \param alias the mailbox name to where the task is sent
714 * \return Returns #MSG_OK if the task was successfully sent,
715 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
717 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
719 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
720 return MSG_task_send_with_timeout(task, alias, -1);
723 /** \ingroup msg_task_usage
724 * \brief Sends a task to a mailbox with a maximum rate
726 * This is a blocking function, the execution flow will be blocked until the task is sent. The maxrate parameter allows
727 * the application to limit the bandwidth utilization of network links when sending the task.
729 * \param task the task to be sent
730 * \param alias the mailbox name to where the task is sent
731 * \param maxrate the maximum communication rate for sending this task
733 * \return Returns #MSG_OK if the task was successfully sent,
734 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
736 msg_error_t MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
738 task->simdata->rate = maxrate;
739 return MSG_task_send(task, alias);
742 /** \ingroup msg_task_usage
743 * \brief Sends a task to a mailbox with a timeout
745 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
747 * \param task the task to be sent
748 * \param alias the mailbox name to where the task is sent
749 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
751 * \return Returns #MSG_OK if the task was successfully sent,
752 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
754 msg_error_t MSG_task_send_with_timeout(msg_task_t task, const char *alias, double timeout)
756 msg_error_t ret = MSG_OK;
757 simdata_task_t t_simdata = nullptr;
758 msg_process_t process = MSG_process_self();
759 simdata_process_t p_simdata = (simdata_process_t) SIMIX_process_self_get_data();
760 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
762 int call_end = TRACE_msg_task_put_start(task); //must be after CHECK_HOST()
764 /* Prepare the task to send */
765 t_simdata = task->simdata;
766 t_simdata->sender = process;
767 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data())->m_host;
769 t_simdata->setUsed();
771 t_simdata->comm = nullptr;
772 msg_global->sent_msg++;
774 p_simdata->waiting_task = task;
776 /* Try to send it by calling SIMIX network layer */
778 smx_synchro_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simix call */
779 comm = simcall_comm_isend(SIMIX_process_self(), mailbox,t_simdata->bytes_amount,
780 t_simdata->rate, task, sizeof(void *), nullptr, nullptr, nullptr, task, 0);
781 if (TRACE_is_enabled())
782 simcall_set_category(comm, task->category);
783 t_simdata->comm = static_cast<simgrid::simix::Comm*>(comm);
784 simcall_comm_wait(comm, timeout);
787 switch (e.category) {
789 ret = MSG_HOST_FAILURE;
792 ret = MSG_TRANSFER_FAILURE;
801 /* If the send failed, it is not used anymore */
802 t_simdata->setNotUsed();
805 p_simdata->waiting_task = nullptr;
807 TRACE_msg_task_put_end();
811 /** \ingroup msg_task_usage
812 * \brief Sends a task to a mailbox with a timeout and with a maximum rate
814 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
816 * \param task the task to be sent
817 * \param alias the mailbox name to where the task is sent
818 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
819 * \param maxrate the maximum communication rate for sending this task
821 * \return Returns #MSG_OK if the task was successfully sent,
822 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
824 msg_error_t MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias, double timeout, double maxrate)
826 task->simdata->rate = maxrate;
827 return MSG_task_send_with_timeout(task, alias, timeout);
830 /** \ingroup msg_task_usage
831 * \brief Check if there is a communication going on in a mailbox.
833 * \param alias the name of the mailbox to be considered
835 * \return Returns 1 if there is a communication, 0 otherwise
837 int MSG_task_listen(const char *alias)
839 smx_mailbox_t mbox = MSG_mailbox_get_by_alias(alias);
840 return !MSG_mailbox_is_empty(mbox) || (mbox->permanent_receiver && !mbox->done_comm_queue->empty());
843 /** \ingroup msg_task_usage
844 * \brief Look if there is a communication on a mailbox and return the PID of the sender process.
846 * \param alias the name of the mailbox to be considered
848 * \return Returns the PID of sender process,
849 * -1 if there is no communication in the mailbox.
851 int MSG_task_listen_from(const char *alias)
855 if (nullptr == (task = MSG_mailbox_front(MSG_mailbox_get_by_alias(alias))))
858 return MSG_process_get_PID(task->simdata->sender);
861 /** \ingroup msg_task_usage
862 * \brief Sets the tracing category of a task.
864 * This function should be called after the creation of a MSG task, to define the category of that task. The
865 * first parameter task must contain a task that was created with the function #MSG_task_create. The second
866 * parameter category must contain a category that was previously declared with the function #TRACE_category
867 * (or with #TRACE_category_with_color).
869 * See \ref outcomes_vizu for details on how to trace the (categorized) resource utilization.
871 * \param task the task that is going to be categorized
872 * \param category the name of the category to be associated to the task
874 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
876 void MSG_task_set_category (msg_task_t task, const char *category)
878 TRACE_msg_set_task_category (task, category);
881 /** \ingroup msg_task_usage
883 * \brief Gets the current tracing category of a task.
885 * \param task the task to be considered
887 * \see MSG_task_set_category
889 * \return Returns the name of the tracing category of the given task, nullptr otherwise
891 const char *MSG_task_get_category (msg_task_t task)
893 return task->category;
897 * \brief Returns the value of a given AS or router property
899 * \param asr the name of a router or AS
900 * \param name a property name
901 * \return value of a property (or nullptr if property not set)
903 const char *MSG_as_router_get_property_value(const char* asr, const char *name)
905 return (char*) xbt_dict_get_or_null(MSG_as_router_get_properties(asr), name);
909 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to
912 * \param asr the name of a router or AS
913 * \return a dict containing the properties
915 xbt_dict_t MSG_as_router_get_properties(const char* asr)
917 return (simcall_asr_get_properties(asr));
921 * \brief Change the value of a given AS or router
923 * \param asr the name of a router or AS
924 * \param name a property name
925 * \param value what to change the property to
926 * \param free_ctn the freeing function to use to kill the value on need
928 void MSG_as_router_set_property_value(const char* asr, const char *name, char *value,void_f_pvoid_t free_ctn) {
929 xbt_dict_set(MSG_as_router_get_properties(asr), name, value,free_ctn);