1 /* Copyright (c) 2004-2012. 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 "msg_private.h"
7 #include "msg_mailbox.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
19 * takes only one parameter.
20 * \param task a #m_task_t to execute on the location on which the process is running.
21 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
22 * or #MSG_HOST_FAILURE otherwise
24 MSG_error_t MSG_task_execute(m_task_t task)
26 return MSG_parallel_task_execute(task);
29 /** \ingroup m_task_management
30 * \brief Creates a new #m_task_t (a parallel one....).
32 * A constructor for #m_task_t taking six arguments and returning the
34 * \param name a name for the object. It is for user-level information
36 * \param host_nb the number of hosts implied in the parallel task.
37 * \param host_list an array of \p host_nb m_host_t.
38 * \param computation_amount an array of \p host_nb
39 doubles. computation_amount[i] is the total number of operations
40 that have to be performed on host_list[i].
41 * \param communication_amount an array of \p host_nb* \p host_nb doubles.
42 * \param data a pointer to any data may want to attach to the new
43 object. It is for user-level information and can be NULL. It can
44 be retrieved with the function \ref MSG_task_get_data.
46 * \return The new corresponding object.
49 MSG_parallel_task_create(const char *name, int host_nb,
50 const m_host_t * host_list,
51 double *computation_amount,
52 double *communication_amount, void *data)
55 simdata_task_t simdata = xbt_new0(s_simdata_task_t, 1);
56 m_task_t task = xbt_new0(s_m_task_t, 1);
57 task->simdata = simdata;
60 task->name = xbt_strdup(name);
64 simdata->computation_amount = 0;
65 simdata->message_size = 0;
66 simdata->compute = NULL;
70 simdata->sender = NULL;
71 simdata->receiver = NULL;
72 simdata->source = NULL;
74 simdata->host_nb = host_nb;
75 simdata->host_list = xbt_new0(smx_host_t, host_nb);
76 simdata->comp_amount = computation_amount;
77 simdata->comm_amount = communication_amount;
79 for (i = 0; i < host_nb; i++)
80 simdata->host_list[i] = host_list[i]->smx_host;
85 /** \ingroup msg_task_usage
86 * \brief Executes a parallel task and waits for its termination.
88 * \param task a #m_task_t to execute on the location on which the process is running.
90 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
91 * or #MSG_HOST_FAILURE otherwise
93 MSG_error_t MSG_parallel_task_execute(m_task_t task)
96 simdata_task_t simdata = NULL;
97 simdata_process_t p_simdata;
98 e_smx_state_t comp_state;
100 simdata = task->simdata;
103 TRACE_msg_task_execute_start(task);
106 xbt_assert((!simdata->compute) && (task->simdata->isused == 0),
107 "This task is executed somewhere else. Go fix your code! %d",
108 task->simdata->isused);
110 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
112 if (simdata->computation_amount == 0) {
114 TRACE_msg_task_execute_end(task);
119 m_process_t self = SIMIX_process_self();
120 p_simdata = SIMIX_process_self_get_data(self);
122 p_simdata->waiting_action = simdata->compute;
125 simcall_set_category(simdata->compute, task->category);
130 if (simdata->host_nb) {
131 simcall_host_parallel_execute(task->name, simdata->host_nb,
133 simdata->comp_amount,
134 simdata->comm_amount, 1.0, -1.0);
135 comp_state = simcall_host_execution_wait(simdata->compute);
139 simcall_host_execute(task->name, p_simdata->m_host->smx_host,
140 simdata->computation_amount,
143 comp_state = simcall_host_execution_wait(simdata->compute);
146 p_simdata->waiting_action = NULL;
150 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
153 switch (e.category) {
155 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
156 simdata->comm = NULL;
157 simdata->compute = NULL;
159 TRACE_msg_task_execute_end(task);
161 MSG_RETURN(MSG_HOST_FAILURE);
164 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
165 simdata->comm = NULL;
166 simdata->compute = NULL;
168 TRACE_msg_task_execute_end(task);
170 MSG_RETURN(MSG_TASK_CANCELED);
177 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
178 simdata->computation_amount = 0.0;
179 simdata->comm = NULL;
180 simdata->compute = NULL;
182 TRACE_msg_task_execute_end(task);
189 /** \ingroup msg_task_usage
190 * \brief Sleep for the specified number of seconds
192 * Makes the current process sleep until \a time seconds have elapsed.
194 * \param nb_sec a number of second
196 MSG_error_t MSG_process_sleep(double nb_sec)
199 /*m_process_t proc = MSG_process_self();*/
202 TRACE_msg_process_sleep_in(MSG_process_self());
205 /* create action to sleep */
207 /*proc->simdata->waiting_action = act_sleep;
209 FIXME: check if not setting the waiting_action breaks something on msg
211 proc->simdata->waiting_action = NULL;*/
214 simcall_process_sleep(nb_sec);
217 switch (e.category) {
220 TRACE_msg_process_sleep_out(MSG_process_self());
222 MSG_RETURN(MSG_HOST_FAILURE);
230 TRACE_msg_process_sleep_out(MSG_process_self());
235 /** \ingroup msg_task_usage
236 * \brief Deprecated function that used to receive a task from a mailbox from a specific host.
238 * Sorry, this function is not supported anymore. That wouldn't be
239 * impossible to reimplement it, but we are lacking the time to do so ourselves.
240 * If you need this functionality, you can either:
242 * - implement the buffering mechanism on the user-level by queuing all messages
243 * received in the mailbox that do not match your expectation
244 * - change your application logic to leverage the mailboxes features. For example,
245 * if you have A receiving messages from B and C, you could have A waiting on
246 * mailbox "A" most of the time, but on "A#B" when it's waiting for specific
247 * messages from B and "A#C" when waiting for messages from C. You could even get A
248 * sometime waiting on all these mailboxes using @ref MSG_comm_waitany. You can find
249 * an example of use of this function in the @ref MSG_examples section.
250 * - Provide a proper patch to implement this functionality back in MSG. That wouldn't be
251 * very difficult actually. Check the function @ref MSG_mailbox_get_task_ext. During its call to
252 * simcall_comm_recv(), the 5th argument, match_fun, is NULL. Create a function that filters
253 * messages according to the host (that you will pass as sixth argument to simcall_comm_recv()
254 * and that your filtering function will receive as first parameter, and then, the filter could
255 * simply compare the host names, for example. After sufficient testing, provide an example that
256 * we could add to the distribution, and your first contribution to SimGrid is ready. Thanks in advance.
258 * \param task a memory location for storing a #m_task_t.
259 * \param alias name of the mailbox to receive the task from
260 * \param host a #m_host_t host from where the task was sent
263 * #MSG_OK if the task was successfully received,
264 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
267 MSG_task_receive_from_host(m_task_t * task, const char *alias,
270 return MSG_task_receive_ext(task, alias, -1, host);
273 /** \ingroup msg_task_usage
274 * \brief Receives a task from a mailbox.
276 * This is a blocking function, the execution flow will be blocked
277 * until the task is received. See #MSG_task_irecv
278 * for receiving tasks asynchronously.
280 * \param task a memory location for storing a #m_task_t.
281 * \param alias name of the mailbox to receive the task from
284 * #MSG_OK if the task was successfully received,
285 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
287 MSG_error_t MSG_task_receive(m_task_t * task, const char *alias)
289 return MSG_task_receive_with_timeout(task, alias, -1);
292 /** \ingroup msg_task_usage
293 * \brief Receives a task from a mailbox with a given timeout.
295 * This is a blocking function with a timeout, the execution flow will be blocked
296 * until the task is received or the timeout is achieved. See #MSG_task_irecv
297 * for receiving tasks asynchronously. You can provide a -1 timeout
298 * to obtain an infinite timeout.
300 * \param task a memory location for storing a #m_task_t.
301 * \param alias name of the mailbox to receive the task from
302 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
305 * #MSG_OK if the task was successfully received,
306 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
309 MSG_task_receive_with_timeout(m_task_t * task, const char *alias,
312 return MSG_task_receive_ext(task, alias, timeout, NULL);
315 /** \ingroup msg_task_usage
316 * \brief Receives a task from a mailbox from a specific host with a given timeout.
318 * This is a blocking function with a timeout, the execution flow will be blocked
319 * until the task is received or the timeout is achieved. See #MSG_task_irecv
320 * for receiving tasks asynchronously. You can provide a -1 timeout
321 * to obtain an infinite timeout.
323 * \param task a memory location for storing a #m_task_t.
324 * \param alias name of the mailbox to receive the task from
325 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
326 * \param host a #m_host_t host from where the task was sent
329 * #MSG_OK if the task was successfully received,
330 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
333 MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout,
337 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
339 return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
343 /** \ingroup msg_task_usage
344 * \brief Sends a task on a mailbox.
346 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
347 * to end the communication.
349 * \param task a #m_task_t to send on another location.
350 * \param alias name of the mailbox to sent the task to
351 * \return the msg_comm_t communication created
353 msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
355 return MSG_task_isend_with_matching(task,alias,NULL,NULL);
358 /** \ingroup msg_task_usage
359 * \brief Sends a task on a mailbox, with support for matching requests
361 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
362 * to end the communication.
364 * \param task a #m_task_t to send on another location.
365 * \param alias name of the mailbox to sent the task to
366 * \param match_fun boolean function which parameters are:
367 * - match_data_provided_here
368 * - match_data_provided_by_other_side_if_any
369 * - the_smx_action_describing_the_other_side
370 * \param match_data user provided data passed to match_fun
371 * \return the msg_comm_t communication created
373 XBT_INLINE msg_comm_t MSG_task_isend_with_matching(m_task_t task, const char *alias,
374 int (*match_fun)(void*,void*, smx_action_t),
377 simdata_task_t t_simdata = NULL;
378 m_process_t process = MSG_process_self();
379 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
381 /* FIXME: these functions are not traceable */
383 /* Prepare the task to send */
384 t_simdata = task->simdata;
385 t_simdata->sender = process;
386 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
388 xbt_assert(t_simdata->isused == 0,
389 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
391 t_simdata->isused = 1;
392 t_simdata->comm = NULL;
393 msg_global->sent_msg++;
395 /* Send it by calling SIMIX network layer */
396 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
397 comm->task_sent = task;
398 comm->task_received = NULL;
399 comm->status = MSG_OK;
401 simcall_comm_isend(mailbox, t_simdata->message_size,
402 t_simdata->rate, task, sizeof(void *), match_fun, NULL, match_data, 0);
403 t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
408 /** \ingroup msg_task_usage
409 * \brief Sends a task on a mailbox.
411 * This is a non blocking detached send function.
412 * Think of it as a best effort send. Keep in mind that the third parameter
413 * is only called if the communication fails. If the communication does work,
414 * it is responsibility of the receiver code to free anything related to
415 * the task, as usual. More details on this can be obtained on
416 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
417 * in the SimGrid-user mailing list archive.
419 * \param task a #m_task_t to send on another location.
420 * \param alias name of the mailbox to sent the task to
421 * \param cleanup a function to destroy the task if the
422 * communication fails, e.g. MSG_task_destroy
423 * (if NULL, no function will be called)
425 void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
427 simdata_task_t t_simdata = NULL;
428 m_process_t process = MSG_process_self();
429 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
431 /* FIXME: these functions are not traceable */
433 /* Prepare the task to send */
434 t_simdata = task->simdata;
435 t_simdata->sender = process;
436 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
438 xbt_assert(t_simdata->isused == 0,
439 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
441 t_simdata->isused = 1;
442 t_simdata->comm = NULL;
443 msg_global->sent_msg++;
445 /* Send it by calling SIMIX network layer */
446 smx_action_t comm = simcall_comm_isend(mailbox, t_simdata->message_size,
447 t_simdata->rate, task, sizeof(void *), NULL, cleanup, NULL, 1);
448 t_simdata->comm = comm;
451 /** \ingroup msg_task_usage
452 * \brief Starts listening for receiving a task from an asynchronous communication.
454 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
455 * to end the communication.
457 * \param task a memory location for storing a #m_task_t. has to be valid until the end of the communication.
458 * \param name of the mailbox to receive the task on
459 * \return the msg_comm_t communication created
461 msg_comm_t MSG_task_irecv(m_task_t *task, const char *name)
463 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
465 /* FIXME: these functions are not traceable */
468 xbt_assert(task, "Null pointer for the task storage");
472 ("MSG_task_irecv() was asked to write in a non empty task struct.");
474 /* Try to receive it by calling SIMIX network layer */
475 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
476 comm->task_sent = NULL;
477 comm->task_received = task;
478 comm->status = MSG_OK;
479 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL);
484 /** \ingroup msg_task_usage
485 * \brief Checks whether a communication is done, and if yes, finalizes it.
486 * \param comm the communication to test
487 * \return TRUE if the communication is finished
488 * (but it may have failed, use MSG_comm_get_status() to know its status)
489 * or FALSE if the communication is not finished yet
490 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
492 int MSG_comm_test(msg_comm_t comm)
497 finished = simcall_comm_test(comm->s_comm);
499 if (finished && comm->task_received != NULL) {
500 /* I am the receiver */
501 (*comm->task_received)->simdata->isused = 0;
505 switch (e.category) {
508 comm->status = MSG_HOST_FAILURE;
513 comm->status = MSG_TRANSFER_FAILURE;
518 comm->status = MSG_TIMEOUT;
531 /** \ingroup msg_task_usage
532 * \brief This function checks if a communication is finished.
533 * \param comms a vector of communications
534 * \return the position of the finished communication if any
535 * (but it may have failed, use MSG_comm_get_status() to know its status),
536 * or -1 if none is finished
538 int MSG_comm_testany(xbt_dynar_t comms)
541 int finished_index = -1;
543 /* create the equivalent dynar with SIMIX objects */
544 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
547 xbt_dynar_foreach(comms, cursor, comm) {
548 xbt_dynar_push(s_comms, &comm->s_comm);
551 MSG_error_t status = MSG_OK;
553 finished_index = simcall_comm_testany(s_comms);
556 switch (e.category) {
559 finished_index = e.value;
560 status = MSG_HOST_FAILURE;
564 finished_index = e.value;
565 status = MSG_TRANSFER_FAILURE;
569 finished_index = e.value;
570 status = MSG_TIMEOUT;
578 xbt_dynar_free(&s_comms);
580 if (finished_index != -1) {
581 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
582 /* the communication is finished */
583 comm->status = status;
585 if (status == MSG_OK && comm->task_received != NULL) {
586 /* I am the receiver */
587 (*comm->task_received)->simdata->isused = 0;
591 return finished_index;
594 /** \ingroup msg_task_usage
595 * \brief Destroys a communication.
596 * \param comm the communication to destroy.
598 void MSG_comm_destroy(msg_comm_t comm)
603 /** \ingroup msg_task_usage
604 * \brief Wait for the completion of a communication.
606 * It takes two parameters.
607 * \param comm the communication to wait.
608 * \param timeout Wait until the communication terminates or the timeout
609 * occurs. You can provide a -1 timeout to obtain an infinite timeout.
610 * \return MSG_error_t
612 MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
616 simcall_comm_wait(comm->s_comm, timeout);
618 if (comm->task_received != NULL) {
619 /* I am the receiver */
620 (*comm->task_received)->simdata->isused = 0;
623 /* FIXME: these functions are not traceable */
626 switch (e.category) {
628 comm->status = MSG_HOST_FAILURE;
631 comm->status = MSG_TRANSFER_FAILURE;
634 comm->status = MSG_TIMEOUT;
645 /** \ingroup msg_task_usage
646 * \brief This function is called by a sender and permit to wait for each communication
648 * \param comm a vector of communication
649 * \param nb_elem is the size of the comm vector
650 * \param timeout for each call of MSG_comm_wait
652 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
655 for (i = 0; i < nb_elem; i++) {
656 MSG_comm_wait(comm[i], timeout);
660 /** \ingroup msg_task_usage
661 * \brief This function waits for the first communication finished in a list.
662 * \param comms a vector of communications
663 * \return the position of the first finished communication
664 * (but it may have failed, use MSG_comm_get_status() to know its status)
666 int MSG_comm_waitany(xbt_dynar_t comms)
669 int finished_index = -1;
671 /* create the equivalent dynar with SIMIX objects */
672 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
675 xbt_dynar_foreach(comms, cursor, comm) {
676 xbt_dynar_push(s_comms, &comm->s_comm);
679 MSG_error_t status = MSG_OK;
681 finished_index = simcall_comm_waitany(s_comms);
684 switch (e.category) {
687 finished_index = e.value;
688 status = MSG_HOST_FAILURE;
692 finished_index = e.value;
693 status = MSG_TRANSFER_FAILURE;
697 finished_index = e.value;
698 status = MSG_TIMEOUT;
707 xbt_assert(finished_index != -1, "WaitAny returned -1");
708 xbt_dynar_free(&s_comms);
710 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
711 /* the communication is finished */
712 comm->status = status;
714 if (comm->task_received != NULL) {
715 /* I am the receiver */
716 (*comm->task_received)->simdata->isused = 0;
719 return finished_index;
723 * \ingroup msg_task_usage
724 * \brief Returns the error (if any) that occured during a finished communication.
725 * \param comm a finished communication
726 * \return the status of the communication, or #MSG_OK if no error occured
727 * during the communication
729 MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
734 /** \ingroup msg_task_usage
735 * \brief Get a task (#m_task_t) from a communication
737 * \param comm the communication where to get the task
738 * \return the task from the communication
740 m_task_t MSG_comm_get_task(msg_comm_t comm)
742 xbt_assert(comm, "Invalid parameter");
744 return comm->task_received ? *comm->task_received : comm->task_sent;
748 * \brief This function is called by SIMIX to copy the data of a comm.
749 * \param comm the comm
750 * \param buff the data copied
751 * \param buff_size size of the buffer
753 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
756 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
758 // notify the user callback if any
759 if (msg_global->task_copy_callback) {
760 m_task_t task = buff;
761 msg_global->task_copy_callback(task,
762 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
766 /** \ingroup msg_task_usage
767 * \brief Sends a task to a mailbox
769 * This is a blocking function, the execution flow will be blocked
770 * until the task is sent (and received in the other side if #MSG_task_receive is used).
771 * See #MSG_task_isend for sending tasks asynchronously.
773 * \param task the task to be sent
774 * \param alias the mailbox name to where the task is sent
776 * \return Returns #MSG_OK if the task was successfully sent,
777 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
779 MSG_error_t MSG_task_send(m_task_t task, const char *alias)
781 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
782 return MSG_task_send_with_timeout(task, alias, -1);
785 /** \ingroup msg_task_usage
786 * \brief Sends a task to a mailbox with a maximum rate
788 * This is a blocking function, the execution flow will be blocked
789 * until the task is sent. The maxrate parameter allows the application
790 * to limit the bandwidth utilization of network links when sending the task.
792 * \param task the task to be sent
793 * \param alias the mailbox name to where the task is sent
794 * \param maxrate the maximum communication rate for sending this task
796 * \return Returns #MSG_OK if the task was successfully sent,
797 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
800 MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate)
802 task->simdata->rate = maxrate;
803 return MSG_task_send(task, alias);
806 /** \ingroup msg_task_usage
807 * \brief Sends a task to a mailbox with a timeout
809 * This is a blocking function, the execution flow will be blocked
810 * until the task is sent or the timeout is achieved.
812 * \param task the task to be sent
813 * \param alias the mailbox name to where the task is sent
814 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
816 * \return Returns #MSG_OK if the task was successfully sent,
817 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
820 MSG_task_send_with_timeout(m_task_t task, const char *alias,
823 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
827 /** \ingroup msg_task_usage
828 * \brief Check if there is a communication going on in a mailbox.
830 * \param alias the name of the mailbox to be considered
832 * \return Returns 1 if there is a communication, 0 otherwise
834 int MSG_task_listen(const char *alias)
836 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
839 /** \ingroup msg_task_usage
840 * \brief Check the number of communication actions of a given host pending in a mailbox.
842 * \param alias the name of the mailbox to be considered
843 * \param host the host to check for communication
845 * \return Returns the number of pending communication actions of the host in the
846 * given mailbox, 0 if there is no pending communication actions.
849 int MSG_task_listen_from_host(const char *alias, m_host_t host)
852 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
856 /** \ingroup msg_task_usage
857 * \brief Look if there is a communication on a mailbox and return the
858 * PID of the sender process.
860 * \param alias the name of the mailbox to be considered
862 * \return Returns the PID of sender process,
863 * -1 if there is no communication in the mailbox.
865 int MSG_task_listen_from(const char *alias)
870 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
873 return MSG_process_get_PID(task->simdata->sender);
876 /** \ingroup msg_task_usage
877 * \brief Sets the tracing category of a task.
879 * This function should be called after the creation of
880 * a MSG task, to define the category of that task. The
881 * first parameter task must contain a task that was
882 * created with the function #MSG_task_create. The second
883 * parameter category must contain a category that was
884 * previously declared with the function #TRACE_category
885 * (or with #TRACE_category_with_color).
887 * See \ref tracing_tracing for details on how to trace
888 * the (categorized) resource utilization.
890 * \param task the task that is going to be categorized
891 * \param category the name of the category to be associated to the task
893 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
895 void MSG_task_set_category (m_task_t task, const char *category)
898 TRACE_msg_set_task_category (task, category);
902 /** \ingroup msg_task_usage
904 * \brief Gets the current tracing category of a task.
906 * \param task the task to be considered
908 * \see MSG_task_set_category
910 * \return Returns the name of the tracing category of the given task, NULL otherwise
912 const char *MSG_task_get_category (m_task_t task)
915 return task->category;
921 #ifdef MSG_USE_DEPRECATED
922 /** \ingroup msg_deprecated_functions
924 * \brief Return the last value returned by a MSG function (except
927 MSG_error_t MSG_get_errno(void)
929 return PROCESS_GET_ERRNO();
932 /** \ingroup msg_deprecated_functions
933 * \brief Put a task on a channel of an host and waits for the end of the
936 * This function is used for describing the behavior of a process. It
937 * takes three parameter.
938 * \param task a #m_task_t to send on another location. This task
939 will not be usable anymore when the function will return. There is
940 no automatic task duplication and you have to save your parameters
941 before calling this function. Tasks are unique and once it has been
942 sent to another location, you should not access it anymore. You do
943 not need to call MSG_task_destroy() but to avoid using, as an
944 effect of inattention, this task anymore, you definitely should
945 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
946 can be transfered iff it has been correctly created with
948 * \param dest the destination of the message
949 * \param channel the channel on which the process should put this
950 task. This value has to be >=0 and < than the maximal number of
951 channels fixed with MSG_set_channel_number().
952 * \return #MSG_HOST_FAILURE if the host on which
953 * this function was called was shut down,
954 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
955 * (network failure, dest failure) or #MSG_OK if it succeeded.
957 MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel)
959 XBT_WARN("DEPRECATED! Now use MSG_task_send");
960 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
963 /** \ingroup msg_deprecated_functions
964 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
970 MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel,
973 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
974 task->simdata->rate = maxrate;
975 return MSG_task_put(task, dest, channel);
978 /** \ingroup msg_deprecated_functions
980 * \brief Put a task on a channel of an
981 * host (with a timeout on the waiting of the destination host) and
982 * waits for the end of the transmission.
984 * This function is used for describing the behavior of a process. It
985 * takes four parameter.
986 * \param task a #m_task_t to send on another location. This task
987 will not be usable anymore when the function will return. There is
988 no automatic task duplication and you have to save your parameters
989 before calling this function. Tasks are unique and once it has been
990 sent to another location, you should not access it anymore. You do
991 not need to call MSG_task_destroy() but to avoid using, as an
992 effect of inattention, this task anymore, you definitely should
993 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
994 can be transfered iff it has been correctly created with
996 * \param dest the destination of the message
997 * \param channel the channel on which the process should put this
998 task. This value has to be >=0 and < than the maximal number of
999 channels fixed with MSG_set_channel_number().
1000 * \param timeout the maximum time to wait for a task before giving
1001 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1002 will not be modified
1003 * \return #MSG_HOST_FAILURE if the host on which
1004 this function was called was shut down,
1005 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
1006 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
1009 MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
1010 m_channel_t channel, double timeout)
1012 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
1013 xbt_assert((channel >= 0)
1014 && (channel < msg_global->max_channel), "Invalid channel %d",
1017 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", SIMIX_host_get_name(dest->smx_host));
1019 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
1020 (dest, channel), task, timeout);
1023 /** \ingroup msg_deprecated_functions
1024 * \brief Test whether there is a pending communication on a channel, and who sent it.
1026 * It takes one parameter.
1027 * \param channel the channel on which the process should be
1028 listening. This value has to be >=0 and < than the maximal
1029 number of channels fixed with MSG_set_channel_number().
1030 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
1032 int MSG_task_probe_from(m_channel_t channel)
1034 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
1037 xbt_assert((channel >= 0)
1038 && (channel < msg_global->max_channel), "Invalid channel %d",
1043 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
1044 (MSG_host_self(), channel))))
1047 return MSG_process_get_PID(task->simdata->sender);
1050 /** \ingroup msg_deprecated_functions
1051 * \brief Test whether there is a pending communication on a channel.
1053 * It takes one parameter.
1054 * \param channel the channel on which the process should be
1055 listening. This value has to be >=0 and < than the maximal
1056 number of channels fixed with MSG_set_channel_number().
1057 * \return 1 if there is a pending communication and 0 otherwise
1059 int MSG_task_Iprobe(m_channel_t channel)
1061 XBT_WARN("DEPRECATED!");
1062 xbt_assert((channel >= 0)
1063 && (channel < msg_global->max_channel), "Invalid channel %d",
1067 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1068 (MSG_host_self(), channel));
1071 /** \ingroup msg_deprecated_functions
1073 * \brief Return the number of tasks waiting to be received on a \a
1074 channel and sent by \a host.
1076 * It takes two parameters.
1077 * \param channel the channel on which the process should be
1078 listening. This value has to be >=0 and < than the maximal
1079 number of channels fixed with MSG_set_channel_number().
1080 * \param host the host that is to be watched.
1081 * \return the number of tasks waiting to be received on \a channel
1082 and sent by \a host.
1084 int MSG_task_probe_from_host(int channel, m_host_t host)
1086 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1087 xbt_assert((channel >= 0)
1088 && (channel < msg_global->max_channel), "Invalid channel %d",
1092 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1093 (MSG_host_self(), channel),
1098 /** \ingroup msg_deprecated_functions
1099 * \brief Listen on \a channel and waits for receiving a task from \a host.
1101 * It takes three parameters.
1102 * \param task a memory location for storing a #m_task_t. It will
1103 hold a task when this function will return. Thus \a task should not
1104 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1105 those two condition does not hold, there will be a warning message.
1106 * \param channel the channel on which the process should be
1107 listening. This value has to be >=0 and < than the maximal
1108 number of channels fixed with MSG_set_channel_number().
1109 * \param host the host that is to be watched.
1110 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1113 MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
1115 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1116 return MSG_task_get_ext(task, channel, -1, host);
1119 /** \ingroup msg_deprecated_functions
1120 * \brief Listen on a channel and wait for receiving a task.
1122 * It takes two parameters.
1123 * \param task a memory location for storing a #m_task_t. It will
1124 hold a task when this function will return. Thus \a task should not
1125 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1126 those two condition does not hold, there will be a warning message.
1127 * \param channel the channel on which the process should be
1128 listening. This value has to be >=0 and < than the maximal
1129 number of channels fixed with MSG_set_channel_number().
1130 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1132 MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel)
1134 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1135 return MSG_task_get_with_timeout(task, channel, -1);
1138 /** \ingroup msg_deprecated_functions
1139 * \brief Listen on a channel and wait for receiving a task with a timeout.
1141 * It takes three parameters.
1142 * \param task a memory location for storing a #m_task_t. It will
1143 hold a task when this function will return. Thus \a task should not
1144 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1145 those two condition does not hold, there will be a warning message.
1146 * \param channel the channel on which the process should be
1147 listening. This value has to be >=0 and < than the maximal
1148 number of channels fixed with MSG_set_channel_number().
1149 * \param max_duration the maximum time to wait for a task before giving
1150 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1151 will not be modified and will still be
1152 equal to \c NULL when returning.
1153 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1156 MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel,
1157 double max_duration)
1159 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1160 return MSG_task_get_ext(task, channel, max_duration, NULL);
1164 MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout,
1167 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1168 xbt_assert((channel >= 0)
1169 && (channel < msg_global->max_channel), "Invalid channel %d",
1173 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1174 (MSG_host_self(), channel), task, host,