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 = task->simdata;
97 m_process_t self = SIMIX_process_self();
98 simdata_process_t p_simdata = SIMIX_process_self_get_data(self);
99 e_smx_state_t comp_state;
100 MSG_error_t status = MSG_OK;
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 && !simdata->host_nb) {
114 TRACE_msg_task_execute_end(task);
124 if (simdata->host_nb > 0) {
125 simdata->compute = simcall_host_parallel_execute(task->name,
128 simdata->comp_amount,
129 simdata->comm_amount,
131 XBT_DEBUG("Parallel execution action created: %p", simdata->compute);
133 simdata->compute = simcall_host_execute(task->name,
134 p_simdata->m_host->smx_host,
135 simdata->computation_amount,
140 simcall_set_category(simdata->compute, task->category);
142 p_simdata->waiting_action = simdata->compute;
143 comp_state = simcall_host_execution_wait(simdata->compute);
145 p_simdata->waiting_action = NULL;
149 XBT_DEBUG("Execution task '%s' finished in state %d",
150 task->name, (int)comp_state);
153 switch (e.category) {
155 status = MSG_TASK_CANCELED;
162 /* action ended, set comm and compute = NULL, the actions is already destroyed
163 * in the main function */
164 simdata->computation_amount = 0.0;
165 simdata->comm = NULL;
166 simdata->compute = NULL;
168 TRACE_msg_task_execute_end(task);
175 /** \ingroup msg_task_usage
176 * \brief Sleep for the specified number of seconds
178 * Makes the current process sleep until \a time seconds have elapsed.
180 * \param nb_sec a number of second
182 MSG_error_t MSG_process_sleep(double nb_sec)
184 MSG_error_t status = MSG_OK;
185 /*m_process_t proc = MSG_process_self();*/
188 TRACE_msg_process_sleep_in(MSG_process_self());
191 /* create action to sleep */
193 /*proc->simdata->waiting_action = act_sleep;
195 FIXME: check if not setting the waiting_action breaks something on msg
197 proc->simdata->waiting_action = NULL;*/
199 simcall_process_sleep(nb_sec);
202 TRACE_msg_process_sleep_out(MSG_process_self());
207 /** \ingroup msg_task_usage
208 * \brief Deprecated function that used to receive a task from a mailbox from a specific host.
210 * Sorry, this function is not supported anymore. That wouldn't be
211 * impossible to reimplement it, but we are lacking the time to do so ourselves.
212 * If you need this functionality, you can either:
214 * - implement the buffering mechanism on the user-level by queuing all messages
215 * received in the mailbox that do not match your expectation
216 * - change your application logic to leverage the mailboxes features. For example,
217 * if you have A receiving messages from B and C, you could have A waiting on
218 * mailbox "A" most of the time, but on "A#B" when it's waiting for specific
219 * messages from B and "A#C" when waiting for messages from C. You could even get A
220 * sometime waiting on all these mailboxes using @ref MSG_comm_waitany. You can find
221 * an example of use of this function in the @ref MSG_examples section.
222 * - Provide a proper patch to implement this functionality back in MSG. That wouldn't be
223 * very difficult actually. Check the function @ref MSG_mailbox_get_task_ext. During its call to
224 * simcall_comm_recv(), the 5th argument, match_fun, is NULL. Create a function that filters
225 * messages according to the host (that you will pass as sixth argument to simcall_comm_recv()
226 * and that your filtering function will receive as first parameter, and then, the filter could
227 * simply compare the host names, for example. After sufficient testing, provide an example that
228 * we could add to the distribution, and your first contribution to SimGrid is ready. Thanks in advance.
230 * \param task a memory location for storing a #m_task_t.
231 * \param alias name of the mailbox to receive the task from
232 * \param host a #m_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 otherwise.
239 MSG_task_receive_from_host(m_task_t * task, const char *alias,
242 return MSG_task_receive_ext(task, alias, -1, host);
245 /** \ingroup msg_task_usage
246 * \brief Receives a task from a mailbox.
248 * This is a blocking function, the execution flow will be blocked
249 * until the task is received. See #MSG_task_irecv
250 * for receiving tasks asynchronously.
252 * \param task a memory location for storing a #m_task_t.
253 * \param alias name of the mailbox to receive the task from
256 * #MSG_OK if the task was successfully received,
257 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
259 MSG_error_t MSG_task_receive(m_task_t * task, const char *alias)
261 return MSG_task_receive_with_timeout(task, alias, -1);
264 /** \ingroup msg_task_usage
265 * \brief Receives a task from a mailbox with a given timeout.
267 * This is a blocking function with a timeout, the execution flow will be blocked
268 * until the task is received or the timeout is achieved. See #MSG_task_irecv
269 * for receiving tasks asynchronously. You can provide a -1 timeout
270 * to obtain an infinite timeout.
272 * \param task a memory location for storing a #m_task_t.
273 * \param alias name of the mailbox to receive the task from
274 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
277 * #MSG_OK if the task was successfully received,
278 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
281 MSG_task_receive_with_timeout(m_task_t * task, const char *alias,
284 return MSG_task_receive_ext(task, alias, timeout, NULL);
287 /** \ingroup msg_task_usage
288 * \brief Receives a task from a mailbox from a specific host with a given timeout.
290 * This is a blocking function with a timeout, the execution flow will be blocked
291 * until the task is received or the timeout is achieved. See #MSG_task_irecv
292 * for receiving tasks asynchronously. You can provide a -1 timeout
293 * to obtain an infinite timeout.
295 * \param task a memory location for storing a #m_task_t.
296 * \param alias name of the mailbox to receive the task from
297 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
298 * \param host a #m_host_t host from where the task was sent
301 * #MSG_OK if the task was successfully received,
302 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
305 MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout,
309 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
311 return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
315 /** \ingroup msg_task_usage
316 * \brief Sends a task on a mailbox.
318 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
319 * to end the communication.
321 * \param task a #m_task_t to send on another location.
322 * \param alias name of the mailbox to sent the task to
323 * \return the msg_comm_t communication created
325 msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
327 return MSG_task_isend_with_matching(task,alias,NULL,NULL);
330 /** \ingroup msg_task_usage
331 * \brief Sends a task on a mailbox, with support for matching requests
333 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
334 * to end the communication.
336 * \param task a #m_task_t to send on another location.
337 * \param alias name of the mailbox to sent the task to
338 * \param match_fun boolean function which parameters are:
339 * - match_data_provided_here
340 * - match_data_provided_by_other_side_if_any
341 * - the_smx_action_describing_the_other_side
342 * \param match_data user provided data passed to match_fun
343 * \return the msg_comm_t communication created
345 XBT_INLINE msg_comm_t MSG_task_isend_with_matching(m_task_t task, const char *alias,
346 int (*match_fun)(void*,void*, smx_action_t),
349 simdata_task_t t_simdata = NULL;
350 m_process_t process = MSG_process_self();
351 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
353 /* FIXME: these functions are not traceable */
355 /* Prepare the task to send */
356 t_simdata = task->simdata;
357 t_simdata->sender = process;
358 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
360 xbt_assert(t_simdata->isused == 0,
361 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
363 t_simdata->isused = 1;
364 t_simdata->comm = NULL;
365 msg_global->sent_msg++;
367 /* Send it by calling SIMIX network layer */
368 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
369 comm->task_sent = task;
370 comm->task_received = NULL;
371 comm->status = MSG_OK;
373 simcall_comm_isend(mailbox, t_simdata->message_size,
374 t_simdata->rate, task, sizeof(void *), match_fun, NULL, match_data, 0);
375 t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
380 /** \ingroup msg_task_usage
381 * \brief Sends a task on a mailbox.
383 * This is a non blocking detached send function.
384 * Think of it as a best effort send. Keep in mind that the third parameter
385 * is only called if the communication fails. If the communication does work,
386 * it is responsibility of the receiver code to free anything related to
387 * the task, as usual. More details on this can be obtained on
388 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
389 * in the SimGrid-user mailing list archive.
391 * \param task a #m_task_t to send on another location.
392 * \param alias name of the mailbox to sent the task to
393 * \param cleanup a function to destroy the task if the
394 * communication fails, e.g. MSG_task_destroy
395 * (if NULL, no function will be called)
397 void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
399 simdata_task_t t_simdata = NULL;
400 m_process_t process = MSG_process_self();
401 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
403 /* FIXME: these functions are not traceable */
405 /* Prepare the task to send */
406 t_simdata = task->simdata;
407 t_simdata->sender = process;
408 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
410 xbt_assert(t_simdata->isused == 0,
411 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
413 t_simdata->isused = 1;
414 t_simdata->comm = NULL;
415 msg_global->sent_msg++;
417 /* Send it by calling SIMIX network layer */
418 smx_action_t comm = simcall_comm_isend(mailbox, t_simdata->message_size,
419 t_simdata->rate, task, sizeof(void *), NULL, cleanup, NULL, 1);
420 t_simdata->comm = comm;
423 /** \ingroup msg_task_usage
424 * \brief Starts listening for receiving a task from an asynchronous communication.
426 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
427 * to end the communication.
429 * \param task a memory location for storing a #m_task_t. has to be valid until the end of the communication.
430 * \param name of the mailbox to receive the task on
431 * \return the msg_comm_t communication created
433 msg_comm_t MSG_task_irecv(m_task_t *task, const char *name)
435 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
437 /* FIXME: these functions are not traceable */
440 xbt_assert(task, "Null pointer for the task storage");
444 ("MSG_task_irecv() was asked to write in a non empty task struct.");
446 /* Try to receive it by calling SIMIX network layer */
447 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
448 comm->task_sent = NULL;
449 comm->task_received = task;
450 comm->status = MSG_OK;
451 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL);
456 /** \ingroup msg_task_usage
457 * \brief Checks whether a communication is done, and if yes, finalizes it.
458 * \param comm the communication to test
459 * \return TRUE if the communication is finished
460 * (but it may have failed, use MSG_comm_get_status() to know its status)
461 * or FALSE if the communication is not finished yet
462 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
464 int MSG_comm_test(msg_comm_t comm)
469 finished = simcall_comm_test(comm->s_comm);
471 if (finished && comm->task_received != NULL) {
472 /* I am the receiver */
473 (*comm->task_received)->simdata->isused = 0;
477 switch (e.category) {
479 comm->status = MSG_TRANSFER_FAILURE;
484 comm->status = MSG_TIMEOUT;
497 /** \ingroup msg_task_usage
498 * \brief This function checks if a communication is finished.
499 * \param comms a vector of communications
500 * \return the position of the finished communication if any
501 * (but it may have failed, use MSG_comm_get_status() to know its status),
502 * or -1 if none is finished
504 int MSG_comm_testany(xbt_dynar_t comms)
507 int finished_index = -1;
509 /* create the equivalent dynar with SIMIX objects */
510 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
513 xbt_dynar_foreach(comms, cursor, comm) {
514 xbt_dynar_push(s_comms, &comm->s_comm);
517 MSG_error_t status = MSG_OK;
519 finished_index = simcall_comm_testany(s_comms);
522 switch (e.category) {
524 finished_index = e.value;
525 status = MSG_TRANSFER_FAILURE;
529 finished_index = e.value;
530 status = MSG_TIMEOUT;
538 xbt_dynar_free(&s_comms);
540 if (finished_index != -1) {
541 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
542 /* the communication is finished */
543 comm->status = status;
545 if (status == MSG_OK && comm->task_received != NULL) {
546 /* I am the receiver */
547 (*comm->task_received)->simdata->isused = 0;
551 return finished_index;
554 /** \ingroup msg_task_usage
555 * \brief Destroys a communication.
556 * \param comm the communication to destroy.
558 void MSG_comm_destroy(msg_comm_t comm)
563 /** \ingroup msg_task_usage
564 * \brief Wait for the completion of a communication.
566 * It takes two parameters.
567 * \param comm the communication to wait.
568 * \param timeout Wait until the communication terminates or the timeout
569 * occurs. You can provide a -1 timeout to obtain an infinite timeout.
570 * \return MSG_error_t
572 MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
576 simcall_comm_wait(comm->s_comm, timeout);
578 if (comm->task_received != NULL) {
579 /* I am the receiver */
580 (*comm->task_received)->simdata->isused = 0;
583 /* FIXME: these functions are not traceable */
586 switch (e.category) {
588 comm->status = MSG_TRANSFER_FAILURE;
591 comm->status = MSG_TIMEOUT;
602 /** \ingroup msg_task_usage
603 * \brief This function is called by a sender and permit to wait for each communication
605 * \param comm a vector of communication
606 * \param nb_elem is the size of the comm vector
607 * \param timeout for each call of MSG_comm_wait
609 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
612 for (i = 0; i < nb_elem; i++) {
613 MSG_comm_wait(comm[i], timeout);
617 /** \ingroup msg_task_usage
618 * \brief This function waits for the first communication finished in a list.
619 * \param comms a vector of communications
620 * \return the position of the first finished communication
621 * (but it may have failed, use MSG_comm_get_status() to know its status)
623 int MSG_comm_waitany(xbt_dynar_t comms)
626 int finished_index = -1;
628 /* create the equivalent dynar with SIMIX objects */
629 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
632 xbt_dynar_foreach(comms, cursor, comm) {
633 xbt_dynar_push(s_comms, &comm->s_comm);
636 MSG_error_t status = MSG_OK;
638 finished_index = simcall_comm_waitany(s_comms);
641 switch (e.category) {
643 finished_index = e.value;
644 status = MSG_TRANSFER_FAILURE;
648 finished_index = e.value;
649 status = MSG_TIMEOUT;
658 xbt_assert(finished_index != -1, "WaitAny returned -1");
659 xbt_dynar_free(&s_comms);
661 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
662 /* the communication is finished */
663 comm->status = status;
665 if (comm->task_received != NULL) {
666 /* I am the receiver */
667 (*comm->task_received)->simdata->isused = 0;
670 return finished_index;
674 * \ingroup msg_task_usage
675 * \brief Returns the error (if any) that occured during a finished communication.
676 * \param comm a finished communication
677 * \return the status of the communication, or #MSG_OK if no error occured
678 * during the communication
680 MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
685 /** \ingroup msg_task_usage
686 * \brief Get a task (#m_task_t) from a communication
688 * \param comm the communication where to get the task
689 * \return the task from the communication
691 m_task_t MSG_comm_get_task(msg_comm_t comm)
693 xbt_assert(comm, "Invalid parameter");
695 return comm->task_received ? *comm->task_received : comm->task_sent;
699 * \brief This function is called by SIMIX to copy the data of a comm.
700 * \param comm the comm
701 * \param buff the data copied
702 * \param buff_size size of the buffer
704 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
707 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
709 // notify the user callback if any
710 if (msg_global->task_copy_callback) {
711 m_task_t task = buff;
712 msg_global->task_copy_callback(task,
713 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
717 /** \ingroup msg_task_usage
718 * \brief Sends a task to a mailbox
720 * This is a blocking function, the execution flow will be blocked
721 * until the task is sent (and received in the other side if #MSG_task_receive is used).
722 * See #MSG_task_isend for sending tasks asynchronously.
724 * \param task the task to be sent
725 * \param alias the mailbox name to where the task is sent
727 * \return Returns #MSG_OK if the task was successfully sent,
728 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
730 MSG_error_t MSG_task_send(m_task_t task, const char *alias)
732 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
733 return MSG_task_send_with_timeout(task, alias, -1);
736 /** \ingroup msg_task_usage
737 * \brief Sends a task to a mailbox with a maximum rate
739 * This is a blocking function, the execution flow will be blocked
740 * until the task is sent. The maxrate parameter allows the application
741 * to limit the bandwidth utilization of network links when sending the task.
743 * \param task the task to be sent
744 * \param alias the mailbox name to where the task is sent
745 * \param maxrate the maximum communication rate for sending this task
747 * \return Returns #MSG_OK if the task was successfully sent,
748 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
751 MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate)
753 task->simdata->rate = maxrate;
754 return MSG_task_send(task, alias);
757 /** \ingroup msg_task_usage
758 * \brief Sends a task to a mailbox with a timeout
760 * This is a blocking function, the execution flow will be blocked
761 * until the task is sent or the timeout is achieved.
763 * \param task the task to be sent
764 * \param alias the mailbox name to where the task is sent
765 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
767 * \return Returns #MSG_OK if the task was successfully sent,
768 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
771 MSG_task_send_with_timeout(m_task_t task, const char *alias,
774 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
778 /** \ingroup msg_task_usage
779 * \brief Check if there is a communication going on in a mailbox.
781 * \param alias the name of the mailbox to be considered
783 * \return Returns 1 if there is a communication, 0 otherwise
785 int MSG_task_listen(const char *alias)
787 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
790 /** \ingroup msg_task_usage
791 * \brief Check the number of communication actions of a given host pending in a mailbox.
793 * \param alias the name of the mailbox to be considered
794 * \param host the host to check for communication
796 * \return Returns the number of pending communication actions of the host in the
797 * given mailbox, 0 if there is no pending communication actions.
800 int MSG_task_listen_from_host(const char *alias, m_host_t host)
803 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
807 /** \ingroup msg_task_usage
808 * \brief Look if there is a communication on a mailbox and return the
809 * PID of the sender process.
811 * \param alias the name of the mailbox to be considered
813 * \return Returns the PID of sender process,
814 * -1 if there is no communication in the mailbox.
816 int MSG_task_listen_from(const char *alias)
821 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
824 return MSG_process_get_PID(task->simdata->sender);
827 /** \ingroup msg_task_usage
828 * \brief Sets the tracing category of a task.
830 * This function should be called after the creation of
831 * a MSG task, to define the category of that task. The
832 * first parameter task must contain a task that was
833 * created with the function #MSG_task_create. The second
834 * parameter category must contain a category that was
835 * previously declared with the function #TRACE_category
836 * (or with #TRACE_category_with_color).
838 * See \ref tracing_tracing for details on how to trace
839 * the (categorized) resource utilization.
841 * \param task the task that is going to be categorized
842 * \param category the name of the category to be associated to the task
844 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
846 void MSG_task_set_category (m_task_t task, const char *category)
849 TRACE_msg_set_task_category (task, category);
853 /** \ingroup msg_task_usage
855 * \brief Gets the current tracing category of a task.
857 * \param task the task to be considered
859 * \see MSG_task_set_category
861 * \return Returns the name of the tracing category of the given task, NULL otherwise
863 const char *MSG_task_get_category (m_task_t task)
866 return task->category;
872 #ifdef MSG_USE_DEPRECATED
873 /** \ingroup msg_deprecated_functions
875 * \brief Return the last value returned by a MSG function (except
878 MSG_error_t MSG_get_errno(void)
880 return PROCESS_GET_ERRNO();
883 /** \ingroup msg_deprecated_functions
884 * \brief Put a task on a channel of an host and waits for the end of the
887 * This function is used for describing the behavior of a process. It
888 * takes three parameter.
889 * \param task a #m_task_t to send on another location. This task
890 will not be usable anymore when the function will return. There is
891 no automatic task duplication and you have to save your parameters
892 before calling this function. Tasks are unique and once it has been
893 sent to another location, you should not access it anymore. You do
894 not need to call MSG_task_destroy() but to avoid using, as an
895 effect of inattention, this task anymore, you definitely should
896 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
897 can be transfered iff it has been correctly created with
899 * \param dest the destination of the message
900 * \param channel the channel on which the process should put this
901 task. This value has to be >=0 and < than the maximal number of
902 channels fixed with MSG_set_channel_number().
903 * \return #MSG_HOST_FAILURE if the host on which
904 * this function was called was shut down,
905 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
906 * (network failure, dest failure) or #MSG_OK if it succeeded.
908 MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel)
910 XBT_WARN("DEPRECATED! Now use MSG_task_send");
911 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
914 /** \ingroup msg_deprecated_functions
915 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
921 MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel,
924 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
925 task->simdata->rate = maxrate;
926 return MSG_task_put(task, dest, channel);
929 /** \ingroup msg_deprecated_functions
931 * \brief Put a task on a channel of an
932 * host (with a timeout on the waiting of the destination host) and
933 * waits for the end of the transmission.
935 * This function is used for describing the behavior of a process. It
936 * takes four parameter.
937 * \param task a #m_task_t to send on another location. This task
938 will not be usable anymore when the function will return. There is
939 no automatic task duplication and you have to save your parameters
940 before calling this function. Tasks are unique and once it has been
941 sent to another location, you should not access it anymore. You do
942 not need to call MSG_task_destroy() but to avoid using, as an
943 effect of inattention, this task anymore, you definitely should
944 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
945 can be transfered iff it has been correctly created with
947 * \param dest the destination of the message
948 * \param channel the channel on which the process should put this
949 task. This value has to be >=0 and < than the maximal number of
950 channels fixed with MSG_set_channel_number().
951 * \param timeout the maximum time to wait for a task before giving
952 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
954 * \return #MSG_HOST_FAILURE if the host on which
955 this function was called was shut down,
956 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
957 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
960 MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
961 m_channel_t channel, double timeout)
963 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
964 xbt_assert((channel >= 0)
965 && (channel < msg_global->max_channel), "Invalid channel %d",
968 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", SIMIX_host_get_name(dest->smx_host));
970 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
971 (dest, channel), task, timeout);
974 /** \ingroup msg_deprecated_functions
975 * \brief Test whether there is a pending communication on a channel, and who sent it.
977 * It takes one parameter.
978 * \param channel the channel on which the process should be
979 listening. This value has to be >=0 and < than the maximal
980 number of channels fixed with MSG_set_channel_number().
981 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
983 int MSG_task_probe_from(m_channel_t channel)
985 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
988 xbt_assert((channel >= 0)
989 && (channel < msg_global->max_channel), "Invalid channel %d",
994 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
995 (MSG_host_self(), channel))))
998 return MSG_process_get_PID(task->simdata->sender);
1001 /** \ingroup msg_deprecated_functions
1002 * \brief Test whether there is a pending communication on a channel.
1004 * It takes one parameter.
1005 * \param channel the channel on which the process should be
1006 listening. This value has to be >=0 and < than the maximal
1007 number of channels fixed with MSG_set_channel_number().
1008 * \return 1 if there is a pending communication and 0 otherwise
1010 int MSG_task_Iprobe(m_channel_t channel)
1012 XBT_WARN("DEPRECATED!");
1013 xbt_assert((channel >= 0)
1014 && (channel < msg_global->max_channel), "Invalid channel %d",
1018 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1019 (MSG_host_self(), channel));
1022 /** \ingroup msg_deprecated_functions
1024 * \brief Return the number of tasks waiting to be received on a \a
1025 channel and sent by \a host.
1027 * It takes two parameters.
1028 * \param channel the channel on which the process should be
1029 listening. This value has to be >=0 and < than the maximal
1030 number of channels fixed with MSG_set_channel_number().
1031 * \param host the host that is to be watched.
1032 * \return the number of tasks waiting to be received on \a channel
1033 and sent by \a host.
1035 int MSG_task_probe_from_host(int channel, m_host_t host)
1037 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1038 xbt_assert((channel >= 0)
1039 && (channel < msg_global->max_channel), "Invalid channel %d",
1043 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1044 (MSG_host_self(), channel),
1049 /** \ingroup msg_deprecated_functions
1050 * \brief Listen on \a channel and waits for receiving a task from \a host.
1052 * It takes three parameters.
1053 * \param task a memory location for storing a #m_task_t. It will
1054 hold a task when this function will return. Thus \a task should not
1055 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1056 those two condition does not hold, there will be a warning message.
1057 * \param channel the channel on which the process should be
1058 listening. This value has to be >=0 and < than the maximal
1059 number of channels fixed with MSG_set_channel_number().
1060 * \param host the host that is to be watched.
1061 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1064 MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
1066 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1067 return MSG_task_get_ext(task, channel, -1, host);
1070 /** \ingroup msg_deprecated_functions
1071 * \brief Listen on a channel and wait for receiving a task.
1073 * It takes two parameters.
1074 * \param task a memory location for storing a #m_task_t. It will
1075 hold a task when this function will return. Thus \a task should not
1076 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1077 those two condition does not hold, there will be a warning message.
1078 * \param channel the channel on which the process should be
1079 listening. This value has to be >=0 and < than the maximal
1080 number of channels fixed with MSG_set_channel_number().
1081 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1083 MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel)
1085 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1086 return MSG_task_get_with_timeout(task, channel, -1);
1089 /** \ingroup msg_deprecated_functions
1090 * \brief Listen on a channel and wait for receiving a task with a timeout.
1092 * It takes three parameters.
1093 * \param task a memory location for storing a #m_task_t. It will
1094 hold a task when this function will return. Thus \a task should not
1095 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1096 those two condition does not hold, there will be a warning message.
1097 * \param channel the channel on which the process should be
1098 listening. This value has to be >=0 and < than the maximal
1099 number of channels fixed with MSG_set_channel_number().
1100 * \param max_duration the maximum time to wait for a task before giving
1101 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1102 will not be modified and will still be
1103 equal to \c NULL when returning.
1104 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1107 MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel,
1108 double max_duration)
1110 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1111 return MSG_task_get_ext(task, channel, max_duration, NULL);
1115 MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout,
1118 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1119 xbt_assert((channel >= 0)
1120 && (channel < msg_global->max_channel), "Invalid channel %d",
1124 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1125 (MSG_host_self(), channel), task, host,