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;
99 MSG_error_t status = MSG_OK;
101 simdata = task->simdata;
104 TRACE_msg_task_execute_start(task);
107 xbt_assert((!simdata->compute) && (task->simdata->isused == 0),
108 "This task is executed somewhere else. Go fix your code! %d",
109 task->simdata->isused);
111 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
113 if (simdata->computation_amount == 0) {
115 TRACE_msg_task_execute_end(task);
120 m_process_t self = SIMIX_process_self();
121 p_simdata = SIMIX_process_self_get_data(self);
123 p_simdata->waiting_action = simdata->compute;
126 simcall_set_category(simdata->compute, task->category);
131 if (simdata->host_nb) {
132 simcall_host_parallel_execute(task->name, simdata->host_nb,
134 simdata->comp_amount,
135 simdata->comm_amount, 1.0, -1.0);
136 comp_state = simcall_host_execution_wait(simdata->compute);
140 simcall_host_execute(task->name, p_simdata->m_host->smx_host,
141 simdata->computation_amount,
144 comp_state = simcall_host_execution_wait(simdata->compute);
147 p_simdata->waiting_action = NULL;
151 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
154 switch (e.category) {
156 status = MSG_HOST_FAILURE;
159 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
160 simdata->comm = NULL;
161 simdata->compute = NULL;
163 TRACE_msg_task_execute_end(task);
165 status = MSG_TASK_CANCELED;
172 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
173 simdata->computation_amount = 0.0;
174 simdata->comm = NULL;
175 simdata->compute = NULL;
177 TRACE_msg_task_execute_end(task);
184 /** \ingroup msg_task_usage
185 * \brief Sleep for the specified number of seconds
187 * Makes the current process sleep until \a time seconds have elapsed.
189 * \param nb_sec a number of second
191 MSG_error_t MSG_process_sleep(double nb_sec)
194 MSG_error_t status = MSG_OK;
195 /*m_process_t proc = MSG_process_self();*/
198 TRACE_msg_process_sleep_in(MSG_process_self());
201 /* create action to sleep */
203 /*proc->simdata->waiting_action = act_sleep;
205 FIXME: check if not setting the waiting_action breaks something on msg
207 proc->simdata->waiting_action = NULL;*/
210 simcall_process_sleep(nb_sec);
213 switch (e.category) {
216 TRACE_msg_process_sleep_out(MSG_process_self());
218 status = MSG_HOST_FAILURE;
227 TRACE_msg_process_sleep_out(MSG_process_self());
232 /** \ingroup msg_task_usage
233 * \brief Deprecated function that used to receive a task from a mailbox from a specific host.
235 * Sorry, this function is not supported anymore. That wouldn't be
236 * impossible to reimplement it, but we are lacking the time to do so ourselves.
237 * If you need this functionality, you can either:
239 * - implement the buffering mechanism on the user-level by queuing all messages
240 * received in the mailbox that do not match your expectation
241 * - change your application logic to leverage the mailboxes features. For example,
242 * if you have A receiving messages from B and C, you could have A waiting on
243 * mailbox "A" most of the time, but on "A#B" when it's waiting for specific
244 * messages from B and "A#C" when waiting for messages from C. You could even get A
245 * sometime waiting on all these mailboxes using @ref MSG_comm_waitany. You can find
246 * an example of use of this function in the @ref MSG_examples section.
247 * - Provide a proper patch to implement this functionality back in MSG. That wouldn't be
248 * very difficult actually. Check the function @ref MSG_mailbox_get_task_ext. During its call to
249 * simcall_comm_recv(), the 5th argument, match_fun, is NULL. Create a function that filters
250 * messages according to the host (that you will pass as sixth argument to simcall_comm_recv()
251 * and that your filtering function will receive as first parameter, and then, the filter could
252 * simply compare the host names, for example. After sufficient testing, provide an example that
253 * we could add to the distribution, and your first contribution to SimGrid is ready. Thanks in advance.
255 * \param task a memory location for storing a #m_task_t.
256 * \param alias name of the mailbox to receive the task from
257 * \param host a #m_host_t host from where the task was sent
260 * #MSG_OK if the task was successfully received,
261 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
264 MSG_task_receive_from_host(m_task_t * task, const char *alias,
267 return MSG_task_receive_ext(task, alias, -1, host);
270 /** \ingroup msg_task_usage
271 * \brief Receives a task from a mailbox.
273 * This is a blocking function, the execution flow will be blocked
274 * until the task is received. See #MSG_task_irecv
275 * for receiving tasks asynchronously.
277 * \param task a memory location for storing a #m_task_t.
278 * \param alias name of the mailbox to receive the task from
281 * #MSG_OK if the task was successfully received,
282 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
284 MSG_error_t MSG_task_receive(m_task_t * task, const char *alias)
286 return MSG_task_receive_with_timeout(task, alias, -1);
289 /** \ingroup msg_task_usage
290 * \brief Receives a task from a mailbox with a given timeout.
292 * This is a blocking function with a timeout, the execution flow will be blocked
293 * until the task is received or the timeout is achieved. See #MSG_task_irecv
294 * for receiving tasks asynchronously. You can provide a -1 timeout
295 * to obtain an infinite timeout.
297 * \param task a memory location for storing a #m_task_t.
298 * \param alias name of the mailbox to receive the task from
299 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
302 * #MSG_OK if the task was successfully received,
303 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
306 MSG_task_receive_with_timeout(m_task_t * task, const char *alias,
309 return MSG_task_receive_ext(task, alias, timeout, NULL);
312 /** \ingroup msg_task_usage
313 * \brief Receives a task from a mailbox from a specific host with a given timeout.
315 * This is a blocking function with a timeout, the execution flow will be blocked
316 * until the task is received or the timeout is achieved. See #MSG_task_irecv
317 * for receiving tasks asynchronously. You can provide a -1 timeout
318 * to obtain an infinite timeout.
320 * \param task a memory location for storing a #m_task_t.
321 * \param alias name of the mailbox to receive the task from
322 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
323 * \param host a #m_host_t host from where the task was sent
326 * #MSG_OK if the task was successfully received,
327 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
330 MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout,
334 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
336 return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
340 /** \ingroup msg_task_usage
341 * \brief Sends a task on a mailbox.
343 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
344 * to end the communication.
346 * \param task a #m_task_t to send on another location.
347 * \param alias name of the mailbox to sent the task to
348 * \return the msg_comm_t communication created
350 msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
352 return MSG_task_isend_with_matching(task,alias,NULL,NULL);
355 /** \ingroup msg_task_usage
356 * \brief Sends a task on a mailbox, with support for matching requests
358 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
359 * to end the communication.
361 * \param task a #m_task_t to send on another location.
362 * \param alias name of the mailbox to sent the task to
363 * \param match_fun boolean function which parameters are:
364 * - match_data_provided_here
365 * - match_data_provided_by_other_side_if_any
366 * - the_smx_action_describing_the_other_side
367 * \param match_data user provided data passed to match_fun
368 * \return the msg_comm_t communication created
370 XBT_INLINE msg_comm_t MSG_task_isend_with_matching(m_task_t task, const char *alias,
371 int (*match_fun)(void*,void*, smx_action_t),
374 simdata_task_t t_simdata = NULL;
375 m_process_t process = MSG_process_self();
376 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
378 /* FIXME: these functions are not traceable */
380 /* Prepare the task to send */
381 t_simdata = task->simdata;
382 t_simdata->sender = process;
383 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
385 xbt_assert(t_simdata->isused == 0,
386 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
388 t_simdata->isused = 1;
389 t_simdata->comm = NULL;
390 msg_global->sent_msg++;
392 /* Send it by calling SIMIX network layer */
393 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
394 comm->task_sent = task;
395 comm->task_received = NULL;
396 comm->status = MSG_OK;
398 simcall_comm_isend(mailbox, t_simdata->message_size,
399 t_simdata->rate, task, sizeof(void *), match_fun, NULL, match_data, 0);
400 t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
405 /** \ingroup msg_task_usage
406 * \brief Sends a task on a mailbox.
408 * This is a non blocking detached send function.
409 * Think of it as a best effort send. Keep in mind that the third parameter
410 * is only called if the communication fails. If the communication does work,
411 * it is responsibility of the receiver code to free anything related to
412 * the task, as usual. More details on this can be obtained on
413 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
414 * in the SimGrid-user mailing list archive.
416 * \param task a #m_task_t to send on another location.
417 * \param alias name of the mailbox to sent the task to
418 * \param cleanup a function to destroy the task if the
419 * communication fails, e.g. MSG_task_destroy
420 * (if NULL, no function will be called)
422 void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
424 simdata_task_t t_simdata = NULL;
425 m_process_t process = MSG_process_self();
426 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
428 /* FIXME: these functions are not traceable */
430 /* Prepare the task to send */
431 t_simdata = task->simdata;
432 t_simdata->sender = process;
433 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
435 xbt_assert(t_simdata->isused == 0,
436 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
438 t_simdata->isused = 1;
439 t_simdata->comm = NULL;
440 msg_global->sent_msg++;
442 /* Send it by calling SIMIX network layer */
443 smx_action_t comm = simcall_comm_isend(mailbox, t_simdata->message_size,
444 t_simdata->rate, task, sizeof(void *), NULL, cleanup, NULL, 1);
445 t_simdata->comm = comm;
448 /** \ingroup msg_task_usage
449 * \brief Starts listening for receiving a task from an asynchronous communication.
451 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
452 * to end the communication.
454 * \param task a memory location for storing a #m_task_t. has to be valid until the end of the communication.
455 * \param name of the mailbox to receive the task on
456 * \return the msg_comm_t communication created
458 msg_comm_t MSG_task_irecv(m_task_t *task, const char *name)
460 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
462 /* FIXME: these functions are not traceable */
465 xbt_assert(task, "Null pointer for the task storage");
469 ("MSG_task_irecv() was asked to write in a non empty task struct.");
471 /* Try to receive it by calling SIMIX network layer */
472 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
473 comm->task_sent = NULL;
474 comm->task_received = task;
475 comm->status = MSG_OK;
476 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL);
481 /** \ingroup msg_task_usage
482 * \brief Checks whether a communication is done, and if yes, finalizes it.
483 * \param comm the communication to test
484 * \return TRUE if the communication is finished
485 * (but it may have failed, use MSG_comm_get_status() to know its status)
486 * or FALSE if the communication is not finished yet
487 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
489 int MSG_comm_test(msg_comm_t comm)
494 finished = simcall_comm_test(comm->s_comm);
496 if (finished && comm->task_received != NULL) {
497 /* I am the receiver */
498 (*comm->task_received)->simdata->isused = 0;
502 switch (e.category) {
505 comm->status = MSG_HOST_FAILURE;
510 comm->status = MSG_TRANSFER_FAILURE;
515 comm->status = MSG_TIMEOUT;
528 /** \ingroup msg_task_usage
529 * \brief This function checks if a communication is finished.
530 * \param comms a vector of communications
531 * \return the position of the finished communication if any
532 * (but it may have failed, use MSG_comm_get_status() to know its status),
533 * or -1 if none is finished
535 int MSG_comm_testany(xbt_dynar_t comms)
538 int finished_index = -1;
540 /* create the equivalent dynar with SIMIX objects */
541 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
544 xbt_dynar_foreach(comms, cursor, comm) {
545 xbt_dynar_push(s_comms, &comm->s_comm);
548 MSG_error_t status = MSG_OK;
550 finished_index = simcall_comm_testany(s_comms);
553 switch (e.category) {
556 finished_index = e.value;
557 status = MSG_HOST_FAILURE;
561 finished_index = e.value;
562 status = MSG_TRANSFER_FAILURE;
566 finished_index = e.value;
567 status = MSG_TIMEOUT;
575 xbt_dynar_free(&s_comms);
577 if (finished_index != -1) {
578 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
579 /* the communication is finished */
580 comm->status = status;
582 if (status == MSG_OK && comm->task_received != NULL) {
583 /* I am the receiver */
584 (*comm->task_received)->simdata->isused = 0;
588 return finished_index;
591 /** \ingroup msg_task_usage
592 * \brief Destroys a communication.
593 * \param comm the communication to destroy.
595 void MSG_comm_destroy(msg_comm_t comm)
600 /** \ingroup msg_task_usage
601 * \brief Wait for the completion of a communication.
603 * It takes two parameters.
604 * \param comm the communication to wait.
605 * \param timeout Wait until the communication terminates or the timeout
606 * occurs. You can provide a -1 timeout to obtain an infinite timeout.
607 * \return MSG_error_t
609 MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
613 simcall_comm_wait(comm->s_comm, timeout);
615 if (comm->task_received != NULL) {
616 /* I am the receiver */
617 (*comm->task_received)->simdata->isused = 0;
620 /* FIXME: these functions are not traceable */
623 switch (e.category) {
625 comm->status = MSG_HOST_FAILURE;
628 comm->status = MSG_TRANSFER_FAILURE;
631 comm->status = MSG_TIMEOUT;
642 /** \ingroup msg_task_usage
643 * \brief This function is called by a sender and permit to wait for each communication
645 * \param comm a vector of communication
646 * \param nb_elem is the size of the comm vector
647 * \param timeout for each call of MSG_comm_wait
649 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
652 for (i = 0; i < nb_elem; i++) {
653 MSG_comm_wait(comm[i], timeout);
657 /** \ingroup msg_task_usage
658 * \brief This function waits for the first communication finished in a list.
659 * \param comms a vector of communications
660 * \return the position of the first finished communication
661 * (but it may have failed, use MSG_comm_get_status() to know its status)
663 int MSG_comm_waitany(xbt_dynar_t comms)
666 int finished_index = -1;
668 /* create the equivalent dynar with SIMIX objects */
669 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
672 xbt_dynar_foreach(comms, cursor, comm) {
673 xbt_dynar_push(s_comms, &comm->s_comm);
676 MSG_error_t status = MSG_OK;
678 finished_index = simcall_comm_waitany(s_comms);
681 switch (e.category) {
684 finished_index = e.value;
685 status = MSG_HOST_FAILURE;
689 finished_index = e.value;
690 status = MSG_TRANSFER_FAILURE;
694 finished_index = e.value;
695 status = MSG_TIMEOUT;
704 xbt_assert(finished_index != -1, "WaitAny returned -1");
705 xbt_dynar_free(&s_comms);
707 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
708 /* the communication is finished */
709 comm->status = status;
711 if (comm->task_received != NULL) {
712 /* I am the receiver */
713 (*comm->task_received)->simdata->isused = 0;
716 return finished_index;
720 * \ingroup msg_task_usage
721 * \brief Returns the error (if any) that occured during a finished communication.
722 * \param comm a finished communication
723 * \return the status of the communication, or #MSG_OK if no error occured
724 * during the communication
726 MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
731 /** \ingroup msg_task_usage
732 * \brief Get a task (#m_task_t) from a communication
734 * \param comm the communication where to get the task
735 * \return the task from the communication
737 m_task_t MSG_comm_get_task(msg_comm_t comm)
739 xbt_assert(comm, "Invalid parameter");
741 return comm->task_received ? *comm->task_received : comm->task_sent;
745 * \brief This function is called by SIMIX to copy the data of a comm.
746 * \param comm the comm
747 * \param buff the data copied
748 * \param buff_size size of the buffer
750 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
753 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
755 // notify the user callback if any
756 if (msg_global->task_copy_callback) {
757 m_task_t task = buff;
758 msg_global->task_copy_callback(task,
759 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
763 /** \ingroup msg_task_usage
764 * \brief Sends a task to a mailbox
766 * This is a blocking function, the execution flow will be blocked
767 * until the task is sent (and received in the other side if #MSG_task_receive is used).
768 * See #MSG_task_isend for sending tasks asynchronously.
770 * \param task the task to be sent
771 * \param alias the mailbox name to where the task is sent
773 * \return Returns #MSG_OK if the task was successfully sent,
774 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
776 MSG_error_t MSG_task_send(m_task_t task, const char *alias)
778 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
779 return MSG_task_send_with_timeout(task, alias, -1);
782 /** \ingroup msg_task_usage
783 * \brief Sends a task to a mailbox with a maximum rate
785 * This is a blocking function, the execution flow will be blocked
786 * until the task is sent. The maxrate parameter allows the application
787 * to limit the bandwidth utilization of network links when sending the task.
789 * \param task the task to be sent
790 * \param alias the mailbox name to where the task is sent
791 * \param maxrate the maximum communication rate for sending this task
793 * \return Returns #MSG_OK if the task was successfully sent,
794 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
797 MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate)
799 task->simdata->rate = maxrate;
800 return MSG_task_send(task, alias);
803 /** \ingroup msg_task_usage
804 * \brief Sends a task to a mailbox with a timeout
806 * This is a blocking function, the execution flow will be blocked
807 * until the task is sent or the timeout is achieved.
809 * \param task the task to be sent
810 * \param alias the mailbox name to where the task is sent
811 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
813 * \return Returns #MSG_OK if the task was successfully sent,
814 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
817 MSG_task_send_with_timeout(m_task_t task, const char *alias,
820 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
824 /** \ingroup msg_task_usage
825 * \brief Check if there is a communication going on in a mailbox.
827 * \param alias the name of the mailbox to be considered
829 * \return Returns 1 if there is a communication, 0 otherwise
831 int MSG_task_listen(const char *alias)
833 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
836 /** \ingroup msg_task_usage
837 * \brief Check the number of communication actions of a given host pending in a mailbox.
839 * \param alias the name of the mailbox to be considered
840 * \param host the host to check for communication
842 * \return Returns the number of pending communication actions of the host in the
843 * given mailbox, 0 if there is no pending communication actions.
846 int MSG_task_listen_from_host(const char *alias, m_host_t host)
849 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
853 /** \ingroup msg_task_usage
854 * \brief Look if there is a communication on a mailbox and return the
855 * PID of the sender process.
857 * \param alias the name of the mailbox to be considered
859 * \return Returns the PID of sender process,
860 * -1 if there is no communication in the mailbox.
862 int MSG_task_listen_from(const char *alias)
867 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
870 return MSG_process_get_PID(task->simdata->sender);
873 /** \ingroup msg_task_usage
874 * \brief Sets the tracing category of a task.
876 * This function should be called after the creation of
877 * a MSG task, to define the category of that task. The
878 * first parameter task must contain a task that was
879 * created with the function #MSG_task_create. The second
880 * parameter category must contain a category that was
881 * previously declared with the function #TRACE_category
882 * (or with #TRACE_category_with_color).
884 * See \ref tracing_tracing for details on how to trace
885 * the (categorized) resource utilization.
887 * \param task the task that is going to be categorized
888 * \param category the name of the category to be associated to the task
890 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
892 void MSG_task_set_category (m_task_t task, const char *category)
895 TRACE_msg_set_task_category (task, category);
899 /** \ingroup msg_task_usage
901 * \brief Gets the current tracing category of a task.
903 * \param task the task to be considered
905 * \see MSG_task_set_category
907 * \return Returns the name of the tracing category of the given task, NULL otherwise
909 const char *MSG_task_get_category (m_task_t task)
912 return task->category;
918 #ifdef MSG_USE_DEPRECATED
919 /** \ingroup msg_deprecated_functions
921 * \brief Return the last value returned by a MSG function (except
924 MSG_error_t MSG_get_errno(void)
926 return PROCESS_GET_ERRNO();
929 /** \ingroup msg_deprecated_functions
930 * \brief Put a task on a channel of an host and waits for the end of the
933 * This function is used for describing the behavior of a process. It
934 * takes three parameter.
935 * \param task a #m_task_t to send on another location. This task
936 will not be usable anymore when the function will return. There is
937 no automatic task duplication and you have to save your parameters
938 before calling this function. Tasks are unique and once it has been
939 sent to another location, you should not access it anymore. You do
940 not need to call MSG_task_destroy() but to avoid using, as an
941 effect of inattention, this task anymore, you definitely should
942 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
943 can be transfered iff it has been correctly created with
945 * \param dest the destination of the message
946 * \param channel the channel on which the process should put this
947 task. This value has to be >=0 and < than the maximal number of
948 channels fixed with MSG_set_channel_number().
949 * \return #MSG_HOST_FAILURE if the host on which
950 * this function was called was shut down,
951 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
952 * (network failure, dest failure) or #MSG_OK if it succeeded.
954 MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel)
956 XBT_WARN("DEPRECATED! Now use MSG_task_send");
957 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
960 /** \ingroup msg_deprecated_functions
961 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
967 MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel,
970 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
971 task->simdata->rate = maxrate;
972 return MSG_task_put(task, dest, channel);
975 /** \ingroup msg_deprecated_functions
977 * \brief Put a task on a channel of an
978 * host (with a timeout on the waiting of the destination host) and
979 * waits for the end of the transmission.
981 * This function is used for describing the behavior of a process. It
982 * takes four parameter.
983 * \param task a #m_task_t to send on another location. This task
984 will not be usable anymore when the function will return. There is
985 no automatic task duplication and you have to save your parameters
986 before calling this function. Tasks are unique and once it has been
987 sent to another location, you should not access it anymore. You do
988 not need to call MSG_task_destroy() but to avoid using, as an
989 effect of inattention, this task anymore, you definitely should
990 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
991 can be transfered iff it has been correctly created with
993 * \param dest the destination of the message
994 * \param channel the channel on which the process should put this
995 task. This value has to be >=0 and < than the maximal number of
996 channels fixed with MSG_set_channel_number().
997 * \param timeout the maximum time to wait for a task before giving
998 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1000 * \return #MSG_HOST_FAILURE if the host on which
1001 this function was called was shut down,
1002 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
1003 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
1006 MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
1007 m_channel_t channel, double timeout)
1009 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
1010 xbt_assert((channel >= 0)
1011 && (channel < msg_global->max_channel), "Invalid channel %d",
1014 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", SIMIX_host_get_name(dest->smx_host));
1016 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
1017 (dest, channel), task, timeout);
1020 /** \ingroup msg_deprecated_functions
1021 * \brief Test whether there is a pending communication on a channel, and who sent it.
1023 * It takes one parameter.
1024 * \param channel the channel on which the process should be
1025 listening. This value has to be >=0 and < than the maximal
1026 number of channels fixed with MSG_set_channel_number().
1027 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
1029 int MSG_task_probe_from(m_channel_t channel)
1031 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
1034 xbt_assert((channel >= 0)
1035 && (channel < msg_global->max_channel), "Invalid channel %d",
1040 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
1041 (MSG_host_self(), channel))))
1044 return MSG_process_get_PID(task->simdata->sender);
1047 /** \ingroup msg_deprecated_functions
1048 * \brief Test whether there is a pending communication on a channel.
1050 * It takes one parameter.
1051 * \param channel the channel on which the process should be
1052 listening. This value has to be >=0 and < than the maximal
1053 number of channels fixed with MSG_set_channel_number().
1054 * \return 1 if there is a pending communication and 0 otherwise
1056 int MSG_task_Iprobe(m_channel_t channel)
1058 XBT_WARN("DEPRECATED!");
1059 xbt_assert((channel >= 0)
1060 && (channel < msg_global->max_channel), "Invalid channel %d",
1064 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1065 (MSG_host_self(), channel));
1068 /** \ingroup msg_deprecated_functions
1070 * \brief Return the number of tasks waiting to be received on a \a
1071 channel and sent by \a host.
1073 * It takes two parameters.
1074 * \param channel the channel on which the process should be
1075 listening. This value has to be >=0 and < than the maximal
1076 number of channels fixed with MSG_set_channel_number().
1077 * \param host the host that is to be watched.
1078 * \return the number of tasks waiting to be received on \a channel
1079 and sent by \a host.
1081 int MSG_task_probe_from_host(int channel, m_host_t host)
1083 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1084 xbt_assert((channel >= 0)
1085 && (channel < msg_global->max_channel), "Invalid channel %d",
1089 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1090 (MSG_host_self(), channel),
1095 /** \ingroup msg_deprecated_functions
1096 * \brief Listen on \a channel and waits for receiving a task from \a host.
1098 * It takes three parameters.
1099 * \param task a memory location for storing a #m_task_t. It will
1100 hold a task when this function will return. Thus \a task should not
1101 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1102 those two condition does not hold, there will be a warning message.
1103 * \param channel the channel on which the process should be
1104 listening. This value has to be >=0 and < than the maximal
1105 number of channels fixed with MSG_set_channel_number().
1106 * \param host the host that is to be watched.
1107 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1110 MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
1112 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1113 return MSG_task_get_ext(task, channel, -1, host);
1116 /** \ingroup msg_deprecated_functions
1117 * \brief Listen on a channel and wait for receiving a task.
1119 * It takes two parameters.
1120 * \param task a memory location for storing a #m_task_t. It will
1121 hold a task when this function will return. Thus \a task should not
1122 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1123 those two condition does not hold, there will be a warning message.
1124 * \param channel the channel on which the process should be
1125 listening. This value has to be >=0 and < than the maximal
1126 number of channels fixed with MSG_set_channel_number().
1127 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1129 MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel)
1131 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1132 return MSG_task_get_with_timeout(task, channel, -1);
1135 /** \ingroup msg_deprecated_functions
1136 * \brief Listen on a channel and wait for receiving a task with a timeout.
1138 * It takes three parameters.
1139 * \param task a memory location for storing a #m_task_t. It will
1140 hold a task when this function will return. Thus \a task should not
1141 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1142 those two condition does not hold, there will be a warning message.
1143 * \param channel the channel on which the process should be
1144 listening. This value has to be >=0 and < than the maximal
1145 number of channels fixed with MSG_set_channel_number().
1146 * \param max_duration the maximum time to wait for a task before giving
1147 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1148 will not be modified and will still be
1149 equal to \c NULL when returning.
1150 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1153 MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel,
1154 double max_duration)
1156 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1157 return MSG_task_get_ext(task, channel, max_duration, NULL);
1161 MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout,
1164 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1165 xbt_assert((channel >= 0)
1166 && (channel < msg_global->max_channel), "Invalid channel %d",
1170 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1171 (MSG_host_self(), channel), task, host,