1 /* Copyright (c) 2004-2014. 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. */
7 #include "msg_private.h"
8 #include "msg_mailbox.h"
11 #include "xbt/sysdep.h"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
14 "Logging specific to MSG (gos)");
16 /** \ingroup msg_task_usage
17 * \brief Executes a task and waits for its termination.
19 * This function is used for describing the behavior of a process. It
20 * 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
23 * or #MSG_HOST_FAILURE otherwise
25 msg_error_t MSG_task_execute(msg_task_t task)
27 /* TODO: add this to other locations */
28 msg_host_t host = MSG_process_get_host(MSG_process_self());
29 MSG_host_add_task(host, task);
31 msg_error_t ret = MSG_parallel_task_execute(task);
33 MSG_host_del_task(host, task);
38 /** \ingroup msg_task_usage
39 * \brief Executes a parallel task and waits for its termination.
41 * \param task a #msg_task_t to execute on the location on which the process is running.
43 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
44 * or #MSG_HOST_FAILURE otherwise
46 msg_error_t MSG_parallel_task_execute(msg_task_t task)
49 simdata_task_t simdata = task->simdata;
50 msg_process_t self = SIMIX_process_self();
51 simdata_process_t p_simdata = SIMIX_process_self_get_data(self);
52 e_smx_state_t comp_state;
53 msg_error_t status = MSG_OK;
56 TRACE_msg_task_execute_start(task);
59 xbt_assert((!simdata->compute) && (task->simdata->isused == 0),
60 "This task is executed somewhere else. Go fix your code! %d",
61 task->simdata->isused!=NULL);
63 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
65 if (simdata->computation_amount == 0 && !simdata->host_nb) {
67 TRACE_msg_task_execute_end(task);
74 if (msg_global->debug_multiple_use)
75 MSG_BT(simdata->isused, "Using Backtrace");
77 simdata->isused = (void*)1;
79 if (simdata->host_nb > 0) {
80 simdata->compute = simcall_host_parallel_execute(task->name,
86 XBT_DEBUG("Parallel execution action created: %p", simdata->compute);
88 unsigned long affinity_mask = (unsigned long) xbt_dict_get_or_null_ext(simdata->affinity_mask_db, (char *) p_simdata->m_host, sizeof(msg_host_t));
89 XBT_DEBUG("execute %s@%s with affinity(0x%04lx)", MSG_task_get_name(task), MSG_host_get_name(p_simdata->m_host), affinity_mask);
91 simdata->compute = simcall_host_execute(task->name,
93 simdata->computation_amount,
101 simcall_set_category(simdata->compute, task->category);
103 p_simdata->waiting_action = simdata->compute;
104 comp_state = simcall_host_execution_wait(simdata->compute);
106 p_simdata->waiting_action = NULL;
108 if (msg_global->debug_multiple_use && simdata->isused!=0)
109 xbt_ex_free(*(xbt_ex_t*)simdata->isused);
112 XBT_DEBUG("Execution task '%s' finished in state %d",
113 task->name, (int)comp_state);
116 switch (e.category) {
118 status = MSG_TASK_CANCELED;
121 status = MSG_HOST_FAILURE;
128 /* action ended, set comm and compute = NULL, the actions is already destroyed
129 * in the main function */
130 simdata->computation_amount = 0.0;
131 simdata->comm = NULL;
132 simdata->compute = NULL;
134 TRACE_msg_task_execute_end(task);
141 /** \ingroup msg_task_usage
142 * \brief Sleep for the specified number of seconds
144 * Makes the current process sleep until \a time seconds have elapsed.
146 * \param nb_sec a number of second
148 msg_error_t MSG_process_sleep(double nb_sec)
151 msg_error_t status = MSG_OK;
152 /*msg_process_t proc = MSG_process_self();*/
155 TRACE_msg_process_sleep_in(MSG_process_self());
158 /* create action to sleep */
160 /*proc->simdata->waiting_action = act_sleep;
162 FIXME: check if not setting the waiting_action breaks something on msg
164 proc->simdata->waiting_action = NULL;*/
167 simcall_process_sleep(nb_sec);
170 switch (e.category) {
172 status = MSG_TASK_CANCELED;
181 TRACE_msg_process_sleep_out(MSG_process_self());
186 /** \ingroup msg_task_usage
187 * \brief Deprecated function that used to receive a task from a mailbox from a specific host.
189 * Sorry, this function is not supported anymore. That wouldn't be
190 * impossible to reimplement it, but we are lacking the time to do so ourselves.
191 * If you need this functionality, you can either:
193 * - implement the buffering mechanism on the user-level by queuing all messages
194 * received in the mailbox that do not match your expectation
195 * - change your application logic to leverage the mailboxes features. For example,
196 * if you have A receiving messages from B and C, you could have A waiting on
197 * mailbox "A" most of the time, but on "A#B" when it's waiting for specific
198 * messages from B and "A#C" when waiting for messages from C. You could even get A
199 * sometime waiting on all these mailboxes using @ref MSG_comm_waitany. You can find
200 * an example of use of this function in the @ref MSG_examples section.
201 * - Provide a proper patch to implement this functionality back in MSG. That wouldn't be
202 * very difficult actually. Check the function @ref MSG_mailbox_get_task_ext. During its call to
203 * simcall_comm_recv(), the 5th argument, match_fun, is NULL. Create a function that filters
204 * messages according to the host (that you will pass as sixth argument to simcall_comm_recv()
205 * and that your filtering function will receive as first parameter, and then, the filter could
206 * simply compare the host names, for example. After sufficient testing, provide an example that
207 * we could add to the distribution, and your first contribution to SimGrid is ready. Thanks in advance.
209 * \param task a memory location for storing a #msg_task_t.
210 * \param alias name of the mailbox to receive the task from
211 * \param host a #msg_host_t host from where the task was sent
214 * #MSG_OK if the task was successfully received,
215 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
218 MSG_task_receive_from_host(msg_task_t * task, const char *alias,
221 return MSG_task_receive_ext(task, alias, -1, host);
225 *\brief Deprecated function that used to receive a task from a mailbox from a specific host
226 *\brief at a given rate
228 * \param task a memory location for storing a #msg_task_t.
229 * \param alias name of the mailbox to receive the task from
230 * \param host a #msg_host_t host from where the task was sent
231 * \param rate limit the reception to rate bandwidth
234 * #MSG_OK if the task was successfully received,
235 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
238 MSG_task_receive_from_host_bounded(msg_task_t * task, const char *alias,
239 msg_host_t host, double rate)
241 return MSG_task_receive_ext_bounded(task, alias, -1, host, rate);
244 /** \ingroup msg_task_usage
245 * \brief Receives a task from a mailbox.
247 * This is a blocking function, the execution flow will be blocked
248 * until the task is received. See #MSG_task_irecv
249 * for receiving tasks asynchronously.
251 * \param task a memory location for storing a #msg_task_t.
252 * \param alias name of the mailbox to receive the task from
255 * #MSG_OK if the task was successfully received,
256 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
258 msg_error_t MSG_task_receive(msg_task_t * task, const char *alias)
260 return MSG_task_receive_with_timeout(task, alias, -1);
263 /** \ingroup msg_task_usage
264 * \brief Receives a task from a mailbox at a given rate.
266 * \param task a memory location for storing a #msg_task_t.
267 * \param alias name of the mailbox to receive the task from
268 * \param rate limit the reception to rate bandwidth
271 * #MSG_OK if the task was successfully received,
272 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
274 msg_error_t MSG_task_receive_bounded(msg_task_t * task, const char *alias,
277 return MSG_task_receive_with_timeout_bounded(task, alias, -1, rate);
280 /** \ingroup msg_task_usage
281 * \brief Receives a task from a mailbox with a given timeout.
283 * This is a blocking function with a timeout, the execution flow will be blocked
284 * until the task is received or the timeout is achieved. See #MSG_task_irecv
285 * for receiving tasks asynchronously. You can provide a -1 timeout
286 * to obtain an infinite timeout.
288 * \param task a memory location for storing a #msg_task_t.
289 * \param alias name of the mailbox to receive the task from
290 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
293 * #MSG_OK if the task was successfully received,
294 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
297 MSG_task_receive_with_timeout(msg_task_t * task, const char *alias,
300 return MSG_task_receive_ext(task, alias, timeout, NULL);
303 /** \ingroup msg_task_usage
304 * \brief Receives a task from a mailbox with a given timeout and at a given rate.
306 * \param task a memory location for storing a #msg_task_t.
307 * \param alias name of the mailbox to receive the task from
308 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
309 * \param rate limit the reception to rate bandwidth
312 * #MSG_OK if the task was successfully received,
313 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
316 MSG_task_receive_with_timeout_bounded(msg_task_t * task, const char *alias,
317 double timeout,double rate)
319 return MSG_task_receive_ext_bounded(task, alias, timeout, NULL, rate);
322 /** \ingroup msg_task_usage
323 * \brief Receives a task from a mailbox from a specific host with a given timeout.
325 * This is a blocking function with a timeout, the execution flow will be blocked
326 * until the task is received or the timeout is achieved. See #MSG_task_irecv
327 * for receiving tasks asynchronously. You can provide a -1 timeout
328 * to obtain an infinite timeout.
330 * \param task a memory location for storing a #msg_task_t.
331 * \param alias name of the mailbox to receive the task from
332 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
333 * \param host a #msg_host_t host from where the task was sent
336 * #MSG_OK if the task was successfully received,
337 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
340 MSG_task_receive_ext(msg_task_t * task, const char *alias, double timeout,
344 msg_error_t ret = MSG_OK;
346 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
349 ret = MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
353 switch (e.category) {
354 case cancel_error: /* may be thrown by MSG_mailbox_get_by_alias */
355 ret = MSG_HOST_FAILURE;
365 /** \ingroup msg_task_usage
366 * \brief Receives a task from a mailbox from a specific host with a given timeout
367 * and at a given rate.
369 * \param task a memory location for storing a #msg_task_t.
370 * \param alias name of the mailbox to receive the task from
371 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
372 * \param host a #msg_host_t host from where the task was sent
373 * \param rate limit the reception to rate bandwidth
376 * #MSG_OK if the task was successfully received,
377 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
380 MSG_task_receive_ext_bounded(msg_task_t * task, const char *alias, double timeout,
381 msg_host_t host, double rate)
384 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
386 return MSG_mailbox_get_task_ext_bounded(MSG_mailbox_get_by_alias(alias), task,
387 host, timeout, rate);
390 /* Internal function used to factorize code between
391 * MSG_task_isend_with_matching() and MSG_task_dsend().
394 msg_comm_t MSG_task_isend_internal(msg_task_t task, const char *alias,
395 int (*match_fun)(void*,void*, smx_action_t),
396 void *match_data, void_f_pvoid_t cleanup,
399 simdata_task_t t_simdata = NULL;
400 msg_process_t process = MSG_process_self();
401 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
404 int call_end = TRACE_msg_task_put_start(task);
407 /* Prepare the task to send */
408 t_simdata = task->simdata;
409 t_simdata->sender = process;
410 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
412 if (t_simdata->isused != 0) {
413 if (msg_global->debug_multiple_use){
414 XBT_ERROR("This task is already used in there:");
415 xbt_backtrace_display(t_simdata->isused);
416 XBT_ERROR("And you try to reuse it from here:");
417 xbt_backtrace_display_current();
419 xbt_assert(t_simdata->isused == 0,
420 "This task is still being used somewhere else. You cannot send it now. Go fix your code! (use --cfg=msg/debug_multiple_use:on to get the backtrace of the other process)");
424 if (msg_global->debug_multiple_use)
425 MSG_BT(t_simdata->isused, "Using Backtrace");
427 t_simdata->isused = (void*)1;
428 t_simdata->comm = NULL;
429 msg_global->sent_msg++;
431 /* Send it by calling SIMIX network layer */
432 smx_action_t act = simcall_comm_isend(mailbox, t_simdata->message_size,
433 t_simdata->rate, task, sizeof(void *),
434 match_fun, cleanup, match_data,detached);
435 t_simdata->comm = act; /* FIXME: is the field t_simdata->comm still useful? */
441 comm = xbt_new0(s_msg_comm_t, 1);
442 comm->task_sent = task;
443 comm->task_received = NULL;
444 comm->status = MSG_OK;
449 if (TRACE_is_enabled()) {
450 simcall_set_category(act, task->category);
454 TRACE_msg_task_put_end();
461 /** \ingroup msg_task_usage
462 * \brief Sends a task on a mailbox.
464 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
465 * to end the communication.
467 * \param task a #msg_task_t to send on another location.
468 * \param alias name of the mailbox to sent the task to
469 * \return the msg_comm_t communication created
471 msg_comm_t MSG_task_isend(msg_task_t task, const char *alias)
473 return MSG_task_isend_internal(task, alias, NULL, NULL, NULL, 0);
476 /** \ingroup msg_task_usage
477 * \brief Sends a task on a mailbox with a maximum rate
479 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
480 * to end the communication. The maxrate parameter allows the application
481 * to limit the bandwidth utilization of network links when sending the task.
483 * \param task a #msg_task_t to send on another location.
484 * \param alias name of the mailbox to sent the task to
485 * \param maxrate the maximum communication rate for sending this task .
486 * \return the msg_comm_t communication created
488 msg_comm_t MSG_task_isend_bounded(msg_task_t task, const char *alias,
491 task->simdata->rate = maxrate;
492 return MSG_task_isend_internal(task, alias, NULL, NULL, NULL, 0);
496 /** \ingroup msg_task_usage
497 * \brief Sends a task on a mailbox, with support for matching requests
499 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
500 * to end the communication.
502 * \param task a #msg_task_t to send on another location.
503 * \param alias name of the mailbox to sent the task to
504 * \param match_fun boolean function which parameters are:
505 * - match_data_provided_here
506 * - match_data_provided_by_other_side_if_any
507 * - the_smx_action_describing_the_other_side
508 * \param match_data user provided data passed to match_fun
509 * \return the msg_comm_t communication created
511 msg_comm_t MSG_task_isend_with_matching(msg_task_t task, const char *alias,
512 int (*match_fun)(void*, void*,
516 return MSG_task_isend_internal(task, alias, match_fun, match_data, NULL, 0);
519 /** \ingroup msg_task_usage
520 * \brief Sends a task on a mailbox.
522 * This is a non blocking detached send function.
523 * Think of it as a best effort send. Keep in mind that the third parameter
524 * is only called if the communication fails. If the communication does work,
525 * it is responsibility of the receiver code to free anything related to
526 * the task, as usual. More details on this can be obtained on
527 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
528 * in the SimGrid-user mailing list archive.
530 * \param task a #msg_task_t to send on another location.
531 * \param alias name of the mailbox to sent the task to
532 * \param cleanup a function to destroy the task if the
533 * communication fails, e.g. MSG_task_destroy
534 * (if NULL, no function will be called)
536 void MSG_task_dsend(msg_task_t task, const char *alias, void_f_pvoid_t cleanup)
538 MSG_task_isend_internal(task, alias, NULL, NULL, cleanup, 1);
541 /** \ingroup msg_task_usage
542 * \brief Sends a task on a mailbox with a maximal rate.
544 * This is a non blocking detached send function.
545 * Think of it as a best effort send. Keep in mind that the third parameter
546 * is only called if the communication fails. If the communication does work,
547 * it is responsibility of the receiver code to free anything related to
548 * the task, as usual. More details on this can be obtained on
549 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
550 * in the SimGrid-user mailing list archive.
552 * \param task a #msg_task_t to send on another location.
553 * \param alias name of the mailbox to sent the task to
554 * \param cleanup a function to destroy the task if the
555 * communication fails, e.g. MSG_task_destroy
556 * (if NULL, no function will be called)
557 * \param maxrate the maximum communication rate for sending this task
560 void MSG_task_dsend_bounded(msg_task_t task, const char *alias,
561 void_f_pvoid_t cleanup, double maxrate)
563 task->simdata->rate = maxrate;
564 MSG_task_dsend(task, alias, cleanup);
567 /** \ingroup msg_task_usage
568 * \brief Starts listening for receiving a task from an asynchronous communication.
570 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
571 * to end the communication.
573 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
574 * \param name of the mailbox to receive the task on
575 * \return the msg_comm_t communication created
577 msg_comm_t MSG_task_irecv(msg_task_t *task, const char *name)
579 return MSG_task_irecv_bounded(task, name, -1.0);
582 /** \ingroup msg_task_usage
583 * \brief Starts listening for receiving a task from an asynchronous communication
586 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
587 * \param name of the mailbox to receive the task on
588 * \param rate limit the bandwidth to the given rate
589 * \return the msg_comm_t communication created
591 msg_comm_t MSG_task_irecv_bounded(msg_task_t *task, const char *name,
594 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
596 /* FIXME: these functions are not traceable */
599 xbt_assert(task, "Null pointer for the task storage");
603 ("MSG_task_irecv() was asked to write in a non empty task struct.");
605 /* Try to receive it by calling SIMIX network layer */
606 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
607 comm->task_sent = NULL;
608 comm->task_received = task;
609 comm->status = MSG_OK;
610 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL, rate);
615 /** \ingroup msg_task_usage
616 * \brief Checks whether a communication is done, and if yes, finalizes it.
617 * \param comm the communication to test
618 * \return TRUE if the communication is finished
619 * (but it may have failed, use MSG_comm_get_status() to know its status)
620 * or FALSE if the communication is not finished yet
621 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
623 int MSG_comm_test(msg_comm_t comm)
629 finished = simcall_comm_test(comm->s_comm);
631 if (finished && comm->task_received != NULL) {
632 /* I am the receiver */
633 simdata_task_t simdata = (*comm->task_received)->simdata;
634 if (msg_global->debug_multiple_use && simdata->isused!=0)
635 xbt_ex_free(*(xbt_ex_t*)simdata->isused);
640 switch (e.category) {
642 comm->status = MSG_TRANSFER_FAILURE;
647 comm->status = MSG_TIMEOUT;
660 /** \ingroup msg_task_usage
661 * \brief This function checks if a communication is finished.
662 * \param comms a vector of communications
663 * \return the position of the finished communication if any
664 * (but it may have failed, use MSG_comm_get_status() to know its status),
665 * or -1 if none is finished
667 int MSG_comm_testany(xbt_dynar_t comms)
670 int finished_index = -1;
672 /* create the equivalent dynar with SIMIX objects */
673 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
676 xbt_dynar_foreach(comms, cursor, comm) {
677 xbt_dynar_push(s_comms, &comm->s_comm);
680 msg_error_t status = MSG_OK;
682 finished_index = simcall_comm_testany(s_comms);
685 switch (e.category) {
687 finished_index = e.value;
688 status = MSG_TRANSFER_FAILURE;
692 finished_index = e.value;
693 status = MSG_TIMEOUT;
701 xbt_dynar_free(&s_comms);
703 if (finished_index != -1) {
704 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
705 /* the communication is finished */
706 comm->status = status;
708 if (status == MSG_OK && comm->task_received != NULL) {
709 /* I am the receiver */
710 simdata_task_t simdata = (*comm->task_received)->simdata;
711 if (msg_global->debug_multiple_use && simdata->isused!=0)
712 xbt_ex_free(*(xbt_ex_t*)simdata->isused);
717 return finished_index;
720 /** \ingroup msg_task_usage
721 * \brief Destroys a communication.
722 * \param comm the communication to destroy.
724 void MSG_comm_destroy(msg_comm_t comm)
729 /** \ingroup msg_task_usage
730 * \brief Wait for the completion of a communication.
732 * It takes two parameters.
733 * \param comm the communication to wait.
734 * \param timeout Wait until the communication terminates or the timeout
735 * occurs. You can provide a -1 timeout to obtain an infinite timeout.
736 * \return msg_error_t
738 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
742 simcall_comm_wait(comm->s_comm, timeout);
744 if (comm->task_received != NULL) {
745 /* I am the receiver */
746 simdata_task_t simdata = (*comm->task_received)->simdata;
747 if (msg_global->debug_multiple_use && simdata->isused!=0)
748 xbt_ex_free(*(xbt_ex_t*)simdata->isused);
752 /* FIXME: these functions are not traceable */
755 switch (e.category) {
757 comm->status = MSG_TRANSFER_FAILURE;
760 comm->status = MSG_TIMEOUT;
771 /** \ingroup msg_task_usage
772 * \brief This function is called by a sender and permit to wait for each communication
774 * \param comm a vector of communication
775 * \param nb_elem is the size of the comm vector
776 * \param timeout for each call of MSG_comm_wait
778 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
781 for (i = 0; i < nb_elem; i++) {
782 MSG_comm_wait(comm[i], timeout);
786 /** \ingroup msg_task_usage
787 * \brief This function waits for the first communication finished in a list.
788 * \param comms a vector of communications
789 * \return the position of the first finished communication
790 * (but it may have failed, use MSG_comm_get_status() to know its status)
792 int MSG_comm_waitany(xbt_dynar_t comms)
795 int finished_index = -1;
797 /* create the equivalent dynar with SIMIX objects */
798 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
801 xbt_dynar_foreach(comms, cursor, comm) {
802 xbt_dynar_push(s_comms, &comm->s_comm);
805 msg_error_t status = MSG_OK;
807 finished_index = simcall_comm_waitany(s_comms);
810 switch (e.category) {
812 finished_index = e.value;
813 status = MSG_TRANSFER_FAILURE;
817 finished_index = e.value;
818 status = MSG_TIMEOUT;
827 xbt_assert(finished_index != -1, "WaitAny returned -1");
828 xbt_dynar_free(&s_comms);
830 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
831 /* the communication is finished */
832 comm->status = status;
834 if (comm->task_received != NULL) {
835 /* I am the receiver */
836 simdata_task_t simdata = (*comm->task_received)->simdata;
837 if (msg_global->debug_multiple_use && simdata->isused!=0)
838 xbt_ex_free(*(xbt_ex_t*)simdata->isused);
842 return finished_index;
846 * \ingroup msg_task_usage
847 * \brief Returns the error (if any) that occured during a finished communication.
848 * \param comm a finished communication
849 * \return the status of the communication, or #MSG_OK if no error occured
850 * during the communication
852 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
857 /** \ingroup msg_task_usage
858 * \brief Get a task (#msg_task_t) from a communication
860 * \param comm the communication where to get the task
861 * \return the task from the communication
863 msg_task_t MSG_comm_get_task(msg_comm_t comm)
865 xbt_assert(comm, "Invalid parameter");
867 return comm->task_received ? *comm->task_received : comm->task_sent;
871 * \brief This function is called by SIMIX in kernel mode to copy the data of a comm.
872 * \param comm the comm
873 * \param buff the data copied
874 * \param buff_size size of the buffer
876 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
879 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
881 // notify the user callback if any
882 if (msg_global->task_copy_callback) {
883 msg_task_t task = buff;
884 msg_global->task_copy_callback(task,
885 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
889 /** \ingroup msg_task_usage
890 * \brief Sends a task to a mailbox
892 * This is a blocking function, the execution flow will be blocked
893 * until the task is sent (and received in the other side if #MSG_task_receive is used).
894 * See #MSG_task_isend for sending tasks asynchronously.
896 * \param task the task to be sent
897 * \param alias the mailbox name to where the task is sent
899 * \return Returns #MSG_OK if the task was successfully sent,
900 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
902 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
904 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
905 return MSG_task_send_with_timeout(task, alias, -1);
908 /** \ingroup msg_task_usage
909 * \brief Sends a task to a mailbox with a maximum rate
911 * This is a blocking function, the execution flow will be blocked
912 * until the task is sent. The maxrate parameter allows the application
913 * to limit the bandwidth utilization of network links when sending the task.
915 * \param task the task to be sent
916 * \param alias the mailbox name to where the task is sent
917 * \param maxrate the maximum communication rate for sending this task
919 * \return Returns #MSG_OK if the task was successfully sent,
920 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
923 MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
925 task->simdata->rate = maxrate;
926 return MSG_task_send(task, alias);
929 /** \ingroup msg_task_usage
930 * \brief Sends a task to a mailbox with a timeout
932 * This is a blocking function, the execution flow will be blocked
933 * until the task is sent or the timeout is achieved.
935 * \param task the task to be sent
936 * \param alias the mailbox name to where the task is sent
937 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
939 * \return Returns #MSG_OK if the task was successfully sent,
940 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
943 MSG_task_send_with_timeout(msg_task_t task, const char *alias,
946 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
950 /** \ingroup msg_task_usage
951 * \brief Sends a task to a mailbox with a timeout and with a maximum rate
953 * This is a blocking function, the execution flow will be blocked
954 * until the task is sent or the timeout is achieved.
956 * \param task the task to be sent
957 * \param alias the mailbox name to where the task is sent
958 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
959 * \param maxrate the maximum communication rate for sending this task
961 * \return Returns #MSG_OK if the task was successfully sent,
962 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
965 MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias,
966 double timeout, double maxrate)
968 task->simdata->rate = maxrate;
969 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
973 /** \ingroup msg_task_usage
974 * \brief Check if there is a communication going on in a mailbox.
976 * \param alias the name of the mailbox to be considered
978 * \return Returns 1 if there is a communication, 0 otherwise
980 int MSG_task_listen(const char *alias)
982 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
985 /** \ingroup msg_task_usage
986 * \brief Check the number of communication actions of a given host pending in a mailbox.
988 * \param alias the name of the mailbox to be considered
989 * \param host the host to check for communication
991 * \return Returns the number of pending communication actions of the host in the
992 * given mailbox, 0 if there is no pending communication actions.
995 int MSG_task_listen_from_host(const char *alias, msg_host_t host)
998 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
1002 /** \ingroup msg_task_usage
1003 * \brief Look if there is a communication on a mailbox and return the
1004 * PID of the sender process.
1006 * \param alias the name of the mailbox to be considered
1008 * \return Returns the PID of sender process,
1009 * -1 if there is no communication in the mailbox.
1011 int MSG_task_listen_from(const char *alias)
1016 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
1019 return MSG_process_get_PID(task->simdata->sender);
1022 /** \ingroup msg_task_usage
1023 * \brief Sets the tracing category of a task.
1025 * This function should be called after the creation of
1026 * a MSG task, to define the category of that task. The
1027 * first parameter task must contain a task that was
1028 * created with the function #MSG_task_create. The second
1029 * parameter category must contain a category that was
1030 * previously declared with the function #TRACE_category
1031 * (or with #TRACE_category_with_color).
1033 * See \ref tracing for details on how to trace
1034 * the (categorized) resource utilization.
1036 * \param task the task that is going to be categorized
1037 * \param category the name of the category to be associated to the task
1039 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
1041 void MSG_task_set_category (msg_task_t task, const char *category)
1044 TRACE_msg_set_task_category (task, category);
1048 /** \ingroup msg_task_usage
1050 * \brief Gets the current tracing category of a task.
1052 * \param task the task to be considered
1054 * \see MSG_task_set_category
1056 * \return Returns the name of the tracing category of the given task, NULL otherwise
1058 const char *MSG_task_get_category (msg_task_t task)
1061 return task->category;
1068 * \brief Returns the value of a given AS or router property
1070 * \param asr the name of a router or AS
1071 * \param name a property name
1072 * \return value of a property (or NULL if property not set)
1074 const char *MSG_as_router_get_property_value(const char* asr, const char *name)
1076 return xbt_dict_get_or_null(MSG_as_router_get_properties(asr), name);
1080 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to
1081 * a the AS or router
1083 * \param asr the name of a router or AS
1084 * \return a dict containing the properties
1086 xbt_dict_t MSG_as_router_get_properties(const char* asr)
1088 return (simcall_asr_get_properties(asr));
1092 * \brief Change the value of a given AS or router
1094 * \param asr the name of a router or AS
1095 * \param name a property name
1096 * \param value what to change the property to
1097 * \param free_ctn the freeing function to use to kill the value on need
1099 void MSG_as_router_set_property_value(const char* asr, const char *name, char *value,void_f_pvoid_t free_ctn) {
1100 xbt_dict_set(MSG_as_router_get_properties(asr), name, value,free_ctn);
1103 #ifdef MSG_USE_DEPRECATED
1104 /** \ingroup msg_deprecated_functions
1106 * \brief Return the last value returned by a MSG function (except
1107 * MSG_get_errno...).
1109 msg_error_t MSG_get_errno(void)
1111 return PROCESS_GET_ERRNO();
1114 /** \ingroup msg_deprecated_functions
1115 * \brief Put a task on a channel of an host and waits for the end of the
1118 * This function is used for describing the behavior of a process. It
1119 * takes three parameter.
1120 * \param task a #msg_task_t to send on another location. This task
1121 will not be usable anymore when the function will return. There is
1122 no automatic task duplication and you have to save your parameters
1123 before calling this function. Tasks are unique and once it has been
1124 sent to another location, you should not access it anymore. You do
1125 not need to call MSG_task_destroy() but to avoid using, as an
1126 effect of inattention, this task anymore, you definitely should
1127 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
1128 can be transfered iff it has been correctly created with
1130 * \param dest the destination of the message
1131 * \param channel the channel on which the process should put this
1132 task. This value has to be >=0 and < than the maximal number of
1133 channels fixed with MSG_set_channel_number().
1134 * \return #MSG_HOST_FAILURE if the host on which
1135 * this function was called was shut down,
1136 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
1137 * (network failure, dest failure) or #MSG_OK if it succeeded.
1139 msg_error_t MSG_task_put(msg_task_t task, msg_host_t dest, m_channel_t channel)
1141 XBT_WARN("DEPRECATED! Now use MSG_task_send");
1142 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
1145 /** \ingroup msg_deprecated_functions
1146 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
1152 MSG_task_put_bounded(msg_task_t task, msg_host_t dest, m_channel_t channel,
1155 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
1156 task->simdata->rate = maxrate;
1157 return MSG_task_put(task, dest, channel);
1160 /** \ingroup msg_deprecated_functions
1162 * \brief Put a task on a channel of an
1163 * host (with a timeout on the waiting of the destination host) and
1164 * waits for the end of the transmission.
1166 * This function is used for describing the behavior of a process. It
1167 * takes four parameter.
1168 * \param task a #msg_task_t to send on another location. This task
1169 will not be usable anymore when the function will return. There is
1170 no automatic task duplication and you have to save your parameters
1171 before calling this function. Tasks are unique and once it has been
1172 sent to another location, you should not access it anymore. You do
1173 not need to call MSG_task_destroy() but to avoid using, as an
1174 effect of inattention, this task anymore, you definitely should
1175 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
1176 can be transfered iff it has been correctly created with
1178 * \param dest the destination of the message
1179 * \param channel the channel on which the process should put this
1180 task. This value has to be >=0 and < than the maximal number of
1181 channels fixed with MSG_set_channel_number().
1182 * \param timeout the maximum time to wait for a task before giving
1183 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1184 will not be modified
1185 * \return #MSG_HOST_FAILURE if the host on which
1186 this function was called was shut down,
1187 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
1188 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
1191 MSG_task_put_with_timeout(msg_task_t task, msg_host_t dest,
1192 m_channel_t channel, double timeout)
1194 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
1195 xbt_assert((channel >= 0)
1196 && (channel < msg_global->max_channel), "Invalid channel %d",
1199 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", MSG_host_get_name(dest));
1201 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
1202 (dest, channel), task, timeout);
1205 /** \ingroup msg_deprecated_functions
1206 * \brief Test whether there is a pending communication on a channel, and who sent it.
1208 * It takes one parameter.
1209 * \param channel the channel on which the process should be
1210 listening. This value has to be >=0 and < than the maximal
1211 number of channels fixed with MSG_set_channel_number().
1212 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
1214 int MSG_task_probe_from(m_channel_t channel)
1216 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
1219 xbt_assert((channel >= 0)
1220 && (channel < msg_global->max_channel), "Invalid channel %d",
1225 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
1226 (MSG_host_self(), channel))))
1229 return MSG_process_get_PID(task->simdata->sender);
1232 /** \ingroup msg_deprecated_functions
1233 * \brief Test whether there is a pending communication on a channel.
1235 * It takes one parameter.
1236 * \param channel the channel on which the process should be
1237 listening. This value has to be >=0 and < than the maximal
1238 number of channels fixed with MSG_set_channel_number().
1239 * \return 1 if there is a pending communication and 0 otherwise
1241 int MSG_task_Iprobe(m_channel_t channel)
1243 XBT_WARN("DEPRECATED!");
1244 xbt_assert((channel >= 0)
1245 && (channel < msg_global->max_channel), "Invalid channel %d",
1249 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1250 (MSG_host_self(), channel));
1253 /** \ingroup msg_deprecated_functions
1255 * \brief Return the number of tasks waiting to be received on a \a
1256 channel and sent by \a host.
1258 * It takes two parameters.
1259 * \param channel the channel on which the process should be
1260 listening. This value has to be >=0 and < than the maximal
1261 number of channels fixed with MSG_set_channel_number().
1262 * \param host the host that is to be watched.
1263 * \return the number of tasks waiting to be received on \a channel
1264 and sent by \a host.
1266 int MSG_task_probe_from_host(int channel, msg_host_t host)
1268 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1269 xbt_assert((channel >= 0)
1270 && (channel < msg_global->max_channel), "Invalid channel %d",
1274 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1275 (MSG_host_self(), channel),
1280 /** \ingroup msg_deprecated_functions
1281 * \brief Listen on \a channel and waits for receiving a task from \a host.
1283 * It takes three parameters.
1284 * \param task a memory location for storing a #msg_task_t. It will
1285 hold a task when this function will return. Thus \a task should not
1286 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1287 those two condition does not hold, there will be a warning message.
1288 * \param channel the channel on which the process should be
1289 listening. This value has to be >=0 and < than the maximal
1290 number of channels fixed with MSG_set_channel_number().
1291 * \param host the host that is to be watched.
1292 * \return a #msg_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1295 MSG_task_get_from_host(msg_task_t * task, m_channel_t channel, msg_host_t host)
1297 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1298 return MSG_task_get_ext(task, channel, -1, host);
1301 /** \ingroup msg_deprecated_functions
1302 * \brief Listen on a channel and wait for receiving a task.
1304 * It takes two parameters.
1305 * \param task a memory location for storing a #msg_task_t. It will
1306 hold a task when this function will return. Thus \a task should not
1307 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1308 those two condition does not hold, there will be a warning message.
1309 * \param channel the channel on which the process should be
1310 listening. This value has to be >=0 and < than the maximal
1311 number of channels fixed with MSG_set_channel_number().
1312 * \return a #msg_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1314 msg_error_t MSG_task_get(msg_task_t * task, m_channel_t channel)
1316 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1317 return MSG_task_get_with_timeout(task, channel, -1);
1320 /** \ingroup msg_deprecated_functions
1321 * \brief Listen on a channel and wait for receiving a task with a timeout.
1323 * It takes three parameters.
1324 * \param task a memory location for storing a #msg_task_t. It will
1325 hold a task when this function will return. Thus \a task should not
1326 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1327 those two condition does not hold, there will be a warning message.
1328 * \param channel the channel on which the process should be
1329 listening. This value has to be >=0 and < than the maximal
1330 number of channels fixed with MSG_set_channel_number().
1331 * \param max_duration the maximum time to wait for a task before giving
1332 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1333 will not be modified and will still be
1334 equal to \c NULL when returning.
1335 * \return a #msg_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1338 MSG_task_get_with_timeout(msg_task_t * task, m_channel_t channel,
1339 double max_duration)
1341 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1342 return MSG_task_get_ext(task, channel, max_duration, NULL);
1346 MSG_task_get_ext(msg_task_t * task, m_channel_t channel, double timeout,
1349 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1350 xbt_assert((channel >= 0)
1351 && (channel < msg_global->max_channel), "Invalid channel %d",
1355 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1356 (MSG_host_self(), channel), task, host,