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)
27 simdata_task_t simdata = NULL;
28 simdata_process_t p_simdata;
29 e_smx_state_t comp_state;
31 simdata = task->simdata;
33 xbt_assert(simdata->host_nb == 0,
34 "This is a parallel task. Go to hell.");
37 TRACE_msg_task_execute_start(task);
40 xbt_assert((!simdata->compute) && (task->simdata->isused == 0),
41 "This task is executed somewhere else. Go fix your code! %d",
42 task->simdata->isused);
44 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
46 if (simdata->computation_amount == 0) {
48 TRACE_msg_task_execute_end(task);
53 m_process_t self = SIMIX_process_self();
54 p_simdata = SIMIX_process_self_get_data(self);
57 simcall_host_execute(task->name, p_simdata->m_host->smx_host,
58 simdata->computation_amount,
61 simcall_set_category(simdata->compute, task->category);
64 p_simdata->waiting_action = simdata->compute;
66 comp_state = simcall_host_execution_wait(simdata->compute);
67 p_simdata->waiting_action = NULL;
71 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
73 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
74 simdata->computation_amount = 0.0;
76 simdata->compute = NULL;
78 TRACE_msg_task_execute_end(task);
85 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
87 simdata->compute = NULL;
89 TRACE_msg_task_execute_end(task);
91 MSG_RETURN(MSG_HOST_FAILURE);
94 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
96 simdata->compute = NULL;
98 TRACE_msg_task_execute_end(task);
100 MSG_RETURN(MSG_TASK_CANCELED);
110 /** \ingroup m_task_management
111 * \brief Creates a new #m_task_t (a parallel one....).
113 * A constructor for #m_task_t taking six arguments and returning the
114 corresponding object.
115 * \param name a name for the object. It is for user-level information
117 * \param host_nb the number of hosts implied in the parallel task.
118 * \param host_list an array of \p host_nb m_host_t.
119 * \param computation_amount an array of \p host_nb
120 doubles. computation_amount[i] is the total number of operations
121 that have to be performed on host_list[i].
122 * \param communication_amount an array of \p host_nb* \p host_nb doubles.
123 * \param data a pointer to any data may want to attach to the new
124 object. It is for user-level information and can be NULL. It can
125 be retrieved with the function \ref MSG_task_get_data.
127 * \return The new corresponding object.
130 MSG_parallel_task_create(const char *name, int host_nb,
131 const m_host_t * host_list,
132 double *computation_amount,
133 double *communication_amount, void *data)
136 simdata_task_t simdata = xbt_new0(s_simdata_task_t, 1);
137 m_task_t task = xbt_new0(s_m_task_t, 1);
138 task->simdata = simdata;
141 task->name = xbt_strdup(name);
145 simdata->computation_amount = 0;
146 simdata->message_size = 0;
147 simdata->compute = NULL;
148 simdata->comm = NULL;
149 simdata->rate = -1.0;
151 simdata->sender = NULL;
152 simdata->receiver = NULL;
153 simdata->source = NULL;
155 simdata->host_nb = host_nb;
156 simdata->host_list = xbt_new0(smx_host_t, host_nb);
157 simdata->comp_amount = computation_amount;
158 simdata->comm_amount = communication_amount;
160 for (i = 0; i < host_nb; i++)
161 simdata->host_list[i] = host_list[i]->smx_host;
166 /** \ingroup msg_task_usage
167 * \brief Executes a parallel task and waits for its termination.
169 * \param task a #m_task_t to execute on the location on which the process is running.
171 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
172 * or #MSG_HOST_FAILURE otherwise
174 MSG_error_t MSG_parallel_task_execute(m_task_t task)
176 simdata_task_t simdata = NULL;
177 e_smx_state_t comp_state;
178 simdata_process_t p_simdata;
180 simdata = task->simdata;
181 p_simdata = SIMIX_process_self_get_data(SIMIX_process_self());
183 xbt_assert((!simdata->compute)
184 && (task->simdata->isused == 0),
185 "This task is executed somewhere else. Go fix your code!");
187 xbt_assert(simdata->host_nb,
188 "This is not a parallel task. Go to hell.");
190 XBT_DEBUG("Parallel computing on %s", SIMIX_host_get_name(p_simdata->m_host->smx_host));
195 simcall_host_parallel_execute(task->name, simdata->host_nb,
197 simdata->comp_amount,
198 simdata->comm_amount, 1.0, -1.0);
199 XBT_DEBUG("Parallel execution action created: %p", simdata->compute);
201 p_simdata->waiting_action = simdata->compute;
202 comp_state = simcall_host_execution_wait(simdata->compute);
203 p_simdata->waiting_action = NULL;
205 XBT_DEBUG("Finished waiting for execution of action %p, state = %d", simdata->compute, (int)comp_state);
209 if (comp_state == SIMIX_DONE) {
210 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
211 simdata->computation_amount = 0.0;
212 simdata->comm = NULL;
213 simdata->compute = NULL;
215 } else if (simcall_host_get_state(SIMIX_host_self()) == 0) {
216 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
217 simdata->comm = NULL;
218 simdata->compute = NULL;
219 MSG_RETURN(MSG_HOST_FAILURE);
221 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
222 simdata->comm = NULL;
223 simdata->compute = NULL;
224 MSG_RETURN(MSG_TASK_CANCELED);
229 /** \ingroup msg_task_usage
230 * \brief Sleep for the specified number of seconds
232 * Makes the current process sleep until \a time seconds have elapsed.
234 * \param nb_sec a number of second
236 MSG_error_t MSG_process_sleep(double nb_sec)
239 /*m_process_t proc = MSG_process_self();*/
242 TRACE_msg_process_sleep_in(MSG_process_self());
245 /* create action to sleep */
247 /*proc->simdata->waiting_action = act_sleep;
249 FIXME: check if not setting the waiting_action breaks something on msg
251 proc->simdata->waiting_action = NULL;*/
254 simcall_process_sleep(nb_sec);
257 switch (e.category) {
260 TRACE_msg_process_sleep_out(MSG_process_self());
262 MSG_RETURN(MSG_HOST_FAILURE);
270 TRACE_msg_process_sleep_out(MSG_process_self());
275 /** \ingroup msg_task_usage
276 * \brief Deprecated function that used to receive a task from a mailbox from a specific host.
278 * Sorry, this function is not supported anymore. That wouldn't be
279 * impossible to reimplement it, but we are lacking the time to do so ourselves.
280 * If you need this functionality, you can either:
282 * - implement the buffering mechanism on the user-level by queuing all messages
283 * received in the mailbox that do not match your expectation
284 * - change your application logic to leverage the mailboxes features. For example,
285 * if you have A receiving messages from B and C, you could have A waiting on
286 * mailbox "A" most of the time, but on "A#B" when it's waiting for specific
287 * messages from B and "A#C" when waiting for messages from C. You could even get A
288 * sometime waiting on all these mailboxes using @ref MSG_comm_waitany. You can find
289 * an example of use of this function in the @ref MSG_examples section.
290 * - Provide a proper patch to implement this functionality back in MSG. That wouldn't be
291 * very difficult actually. Check the function @ref MSG_mailbox_get_task_ext. During its call to
292 * simcall_comm_recv(), the 5th argument, match_fun, is NULL. Create a function that filters
293 * messages according to the host (that you will pass as sixth argument to simcall_comm_recv()
294 * and that your filtering function will receive as first parameter, and then, the filter could
295 * simply compare the host names, for example. After sufficient testing, provide an example that
296 * we could add to the distribution, and your first contribution to SimGrid is ready. Thanks in advance.
298 * \param task a memory location for storing a #m_task_t.
299 * \param alias name of the mailbox to receive the task from
300 * \param host a #m_host_t host from where the task was sent
303 * #MSG_OK if the task was successfully received,
304 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
307 MSG_task_receive_from_host(m_task_t * task, const char *alias,
310 return MSG_task_receive_ext(task, alias, -1, host);
313 /** \ingroup msg_task_usage
314 * \brief Receives a task from a mailbox.
316 * This is a blocking function, the execution flow will be blocked
317 * until the task is received. See #MSG_task_irecv
318 * for receiving tasks asynchronously.
320 * \param task a memory location for storing a #m_task_t.
321 * \param alias name of the mailbox to receive the task from
324 * #MSG_OK if the task was successfully received,
325 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
327 MSG_error_t MSG_task_receive(m_task_t * task, const char *alias)
329 return MSG_task_receive_with_timeout(task, alias, -1);
332 /** \ingroup msg_task_usage
333 * \brief Receives a task from a mailbox with a given timeout.
335 * This is a blocking function with a timeout, the execution flow will be blocked
336 * until the task is received or the timeout is achieved. See #MSG_task_irecv
337 * for receiving tasks asynchronously. You can provide a -1 timeout
338 * to obtain an infinite timeout.
340 * \param task a memory location for storing a #m_task_t.
341 * \param alias name of the mailbox to receive the task from
342 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
345 * #MSG_OK if the task was successfully received,
346 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
349 MSG_task_receive_with_timeout(m_task_t * task, const char *alias,
352 return MSG_task_receive_ext(task, alias, timeout, NULL);
355 /** \ingroup msg_task_usage
356 * \brief Receives a task from a mailbox from a specific host with a given timeout.
358 * This is a blocking function with a timeout, the execution flow will be blocked
359 * until the task is received or the timeout is achieved. See #MSG_task_irecv
360 * for receiving tasks asynchronously. You can provide a -1 timeout
361 * to obtain an infinite timeout.
363 * \param task a memory location for storing a #m_task_t.
364 * \param alias name of the mailbox to receive the task from
365 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
366 * \param host a #m_host_t host from where the task was sent
369 * #MSG_OK if the task was successfully received,
370 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
373 MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout,
377 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
379 return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
383 /** \ingroup msg_task_usage
384 * \brief Sends a task on a mailbox.
386 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
387 * to end the communication.
389 * \param task a #m_task_t to send on another location.
390 * \param alias name of the mailbox to sent the task to
391 * \return the msg_comm_t communication created
393 msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
395 return MSG_task_isend_with_matching(task,alias,NULL,NULL);
398 /** \ingroup msg_task_usage
399 * \brief Sends a task on a mailbox, with support for matching requests
401 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
402 * to end the communication.
404 * \param task a #m_task_t to send on another location.
405 * \param alias name of the mailbox to sent the task to
406 * \param match_fun boolean function which parameters are:
407 * - match_data_provided_here
408 * - match_data_provided_by_other_side_if_any
409 * - the_smx_action_describing_the_other_side
410 * \param match_data user provided data passed to match_fun
411 * \return the msg_comm_t communication created
413 XBT_INLINE msg_comm_t MSG_task_isend_with_matching(m_task_t task, const char *alias,
414 int (*match_fun)(void*,void*, smx_action_t),
417 simdata_task_t t_simdata = NULL;
418 m_process_t process = MSG_process_self();
419 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
421 /* FIXME: these functions are not traceable */
423 /* Prepare the task to send */
424 t_simdata = task->simdata;
425 t_simdata->sender = process;
426 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
428 xbt_assert(t_simdata->isused == 0,
429 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
431 t_simdata->isused = 1;
432 t_simdata->comm = NULL;
433 msg_global->sent_msg++;
435 /* Send it by calling SIMIX network layer */
436 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
437 comm->task_sent = task;
438 comm->task_received = NULL;
439 comm->status = MSG_OK;
441 simcall_comm_isend(mailbox, t_simdata->message_size,
442 t_simdata->rate, task, sizeof(void *), match_fun, NULL, match_data, 0);
443 t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
448 /** \ingroup msg_task_usage
449 * \brief Sends a task on a mailbox.
451 * This is a non blocking detached send function.
452 * Think of it as a best effort send. Keep in mind that the third parameter
453 * is only called if the communication fails. If the communication does work,
454 * it is responsibility of the receiver code to free anything related to
455 * the task, as usual. More details on this can be obtained on
456 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
457 * in the SimGrid-user mailing list archive.
459 * \param task a #m_task_t to send on another location.
460 * \param alias name of the mailbox to sent the task to
461 * \param cleanup a function to destroy the task if the
462 * communication fails, e.g. MSG_task_destroy
463 * (if NULL, no function will be called)
465 void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
467 simdata_task_t t_simdata = NULL;
468 m_process_t process = MSG_process_self();
469 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
471 /* FIXME: these functions are not traceable */
473 /* Prepare the task to send */
474 t_simdata = task->simdata;
475 t_simdata->sender = process;
476 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
478 xbt_assert(t_simdata->isused == 0,
479 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
481 t_simdata->isused = 1;
482 t_simdata->comm = NULL;
483 msg_global->sent_msg++;
485 /* Send it by calling SIMIX network layer */
486 smx_action_t comm = simcall_comm_isend(mailbox, t_simdata->message_size,
487 t_simdata->rate, task, sizeof(void *), NULL, cleanup, NULL, 1);
488 t_simdata->comm = comm;
491 /** \ingroup msg_task_usage
492 * \brief Starts listening for receiving a task from an asynchronous communication.
494 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
495 * to end the communication.
497 * \param task a memory location for storing a #m_task_t. has to be valid until the end of the communication.
498 * \param name of the mailbox to receive the task on
499 * \return the msg_comm_t communication created
501 msg_comm_t MSG_task_irecv(m_task_t *task, const char *name)
503 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
505 /* FIXME: these functions are not traceable */
508 xbt_assert(task, "Null pointer for the task storage");
512 ("MSG_task_irecv() was asked to write in a non empty task struct.");
514 /* Try to receive it by calling SIMIX network layer */
515 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
516 comm->task_sent = NULL;
517 comm->task_received = task;
518 comm->status = MSG_OK;
519 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL);
524 /** \ingroup msg_task_usage
525 * \brief Checks whether a communication is done, and if yes, finalizes it.
526 * \param comm the communication to test
527 * \return TRUE if the communication is finished
528 * (but it may have failed, use MSG_comm_get_status() to know its status)
529 * or FALSE if the communication is not finished yet
530 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
532 int MSG_comm_test(msg_comm_t comm)
537 finished = simcall_comm_test(comm->s_comm);
539 if (finished && comm->task_received != NULL) {
540 /* I am the receiver */
541 (*comm->task_received)->simdata->isused = 0;
545 switch (e.category) {
548 comm->status = MSG_HOST_FAILURE;
553 comm->status = MSG_TRANSFER_FAILURE;
558 comm->status = MSG_TIMEOUT;
571 /** \ingroup msg_task_usage
572 * \brief This function checks if a communication is finished.
573 * \param comms a vector of communications
574 * \return the position of the finished communication if any
575 * (but it may have failed, use MSG_comm_get_status() to know its status),
576 * or -1 if none is finished
578 int MSG_comm_testany(xbt_dynar_t comms)
581 int finished_index = -1;
583 /* create the equivalent dynar with SIMIX objects */
584 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
587 xbt_dynar_foreach(comms, cursor, comm) {
588 xbt_dynar_push(s_comms, &comm->s_comm);
591 MSG_error_t status = MSG_OK;
593 finished_index = simcall_comm_testany(s_comms);
596 switch (e.category) {
599 finished_index = e.value;
600 status = MSG_HOST_FAILURE;
604 finished_index = e.value;
605 status = MSG_TRANSFER_FAILURE;
609 finished_index = e.value;
610 status = MSG_TIMEOUT;
618 xbt_dynar_free(&s_comms);
620 if (finished_index != -1) {
621 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
622 /* the communication is finished */
623 comm->status = status;
625 if (status == MSG_OK && comm->task_received != NULL) {
626 /* I am the receiver */
627 (*comm->task_received)->simdata->isused = 0;
631 return finished_index;
634 /** \ingroup msg_task_usage
635 * \brief Destroys a communication.
636 * \param comm the communication to destroy.
638 void MSG_comm_destroy(msg_comm_t comm)
643 /** \ingroup msg_task_usage
644 * \brief Wait for the completion of a communication.
646 * It takes two parameters.
647 * \param comm the communication to wait.
648 * \param timeout Wait until the communication terminates or the timeout
649 * occurs. You can provide a -1 timeout to obtain an infinite timeout.
650 * \return MSG_error_t
652 MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
656 simcall_comm_wait(comm->s_comm, timeout);
658 if (comm->task_received != NULL) {
659 /* I am the receiver */
660 (*comm->task_received)->simdata->isused = 0;
663 /* FIXME: these functions are not traceable */
666 switch (e.category) {
668 comm->status = MSG_HOST_FAILURE;
671 comm->status = MSG_TRANSFER_FAILURE;
674 comm->status = MSG_TIMEOUT;
685 /** \ingroup msg_task_usage
686 * \brief This function is called by a sender and permit to wait for each communication
688 * \param comm a vector of communication
689 * \param nb_elem is the size of the comm vector
690 * \param timeout for each call of MSG_comm_wait
692 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
695 for (i = 0; i < nb_elem; i++) {
696 MSG_comm_wait(comm[i], timeout);
700 /** \ingroup msg_task_usage
701 * \brief This function waits for the first communication finished in a list.
702 * \param comms a vector of communications
703 * \return the position of the first finished communication
704 * (but it may have failed, use MSG_comm_get_status() to know its status)
706 int MSG_comm_waitany(xbt_dynar_t comms)
709 int finished_index = -1;
711 /* create the equivalent dynar with SIMIX objects */
712 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
715 xbt_dynar_foreach(comms, cursor, comm) {
716 xbt_dynar_push(s_comms, &comm->s_comm);
719 MSG_error_t status = MSG_OK;
721 finished_index = simcall_comm_waitany(s_comms);
724 switch (e.category) {
727 finished_index = e.value;
728 status = MSG_HOST_FAILURE;
732 finished_index = e.value;
733 status = MSG_TRANSFER_FAILURE;
737 finished_index = e.value;
738 status = MSG_TIMEOUT;
747 xbt_assert(finished_index != -1, "WaitAny returned -1");
748 xbt_dynar_free(&s_comms);
750 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
751 /* the communication is finished */
752 comm->status = status;
754 if (comm->task_received != NULL) {
755 /* I am the receiver */
756 (*comm->task_received)->simdata->isused = 0;
759 return finished_index;
763 * \ingroup msg_task_usage
764 * \brief Returns the error (if any) that occured during a finished communication.
765 * \param comm a finished communication
766 * \return the status of the communication, or #MSG_OK if no error occured
767 * during the communication
769 MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
774 /** \ingroup msg_task_usage
775 * \brief Get a task (#m_task_t) from a communication
777 * \param comm the communication where to get the task
778 * \return the task from the communication
780 m_task_t MSG_comm_get_task(msg_comm_t comm)
782 xbt_assert(comm, "Invalid parameter");
784 return comm->task_received ? *comm->task_received : comm->task_sent;
788 * \brief This function is called by SIMIX to copy the data of a comm.
789 * \param comm the comm
790 * \param buff the data copied
791 * \param buff_size size of the buffer
793 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
796 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
798 // notify the user callback if any
799 if (msg_global->task_copy_callback) {
800 m_task_t task = buff;
801 msg_global->task_copy_callback(task,
802 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
806 /** \ingroup msg_task_usage
807 * \brief Sends a task to a mailbox
809 * This is a blocking function, the execution flow will be blocked
810 * until the task is sent (and received in the other side if #MSG_task_receive is used).
811 * See #MSG_task_isend for sending tasks asynchronously.
813 * \param task the task to be sent
814 * \param alias the mailbox name to where the task is sent
816 * \return Returns #MSG_OK if the task was successfully sent,
817 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
819 MSG_error_t MSG_task_send(m_task_t task, const char *alias)
821 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
822 return MSG_task_send_with_timeout(task, alias, -1);
825 /** \ingroup msg_task_usage
826 * \brief Sends a task to a mailbox with a maximum rate
828 * This is a blocking function, the execution flow will be blocked
829 * until the task is sent. The maxrate parameter allows the application
830 * to limit the bandwidth utilization of network links when sending the task.
832 * \param task the task to be sent
833 * \param alias the mailbox name to where the task is sent
834 * \param maxrate the maximum communication rate for sending this task
836 * \return Returns #MSG_OK if the task was successfully sent,
837 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
840 MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate)
842 task->simdata->rate = maxrate;
843 return MSG_task_send(task, alias);
846 /** \ingroup msg_task_usage
847 * \brief Sends a task to a mailbox with a timeout
849 * This is a blocking function, the execution flow will be blocked
850 * until the task is sent or the timeout is achieved.
852 * \param task the task to be sent
853 * \param alias the mailbox name to where the task is sent
854 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
856 * \return Returns #MSG_OK if the task was successfully sent,
857 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
860 MSG_task_send_with_timeout(m_task_t task, const char *alias,
863 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
867 /** \ingroup msg_task_usage
868 * \brief Check if there is a communication going on in a mailbox.
870 * \param alias the name of the mailbox to be considered
872 * \return Returns 1 if there is a communication, 0 otherwise
874 int MSG_task_listen(const char *alias)
876 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
879 /** \ingroup msg_task_usage
880 * \brief Check the number of communication actions of a given host pending in a mailbox.
882 * \param alias the name of the mailbox to be considered
883 * \param host the host to check for communication
885 * \return Returns the number of pending communication actions of the host in the
886 * given mailbox, 0 if there is no pending communication actions.
889 int MSG_task_listen_from_host(const char *alias, m_host_t host)
892 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
896 /** \ingroup msg_task_usage
897 * \brief Look if there is a communication on a mailbox and return the
898 * PID of the sender process.
900 * \param alias the name of the mailbox to be considered
902 * \return Returns the PID of sender process,
903 * -1 if there is no communication in the mailbox.
905 int MSG_task_listen_from(const char *alias)
910 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
913 return MSG_process_get_PID(task->simdata->sender);
916 /** \ingroup msg_task_usage
917 * \brief Sets the tracing category of a task.
919 * This function should be called after the creation of
920 * a MSG task, to define the category of that task. The
921 * first parameter task must contain a task that was
922 * created with the function #MSG_task_create. The second
923 * parameter category must contain a category that was
924 * previously declared with the function #TRACE_category
925 * (or with #TRACE_category_with_color).
927 * See \ref tracing_tracing for details on how to trace
928 * the (categorized) resource utilization.
930 * \param task the task that is going to be categorized
931 * \param category the name of the category to be associated to the task
933 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
935 void MSG_task_set_category (m_task_t task, const char *category)
938 TRACE_msg_set_task_category (task, category);
942 /** \ingroup msg_task_usage
944 * \brief Gets the current tracing category of a task.
946 * \param task the task to be considered
948 * \see MSG_task_set_category
950 * \return Returns the name of the tracing category of the given task, NULL otherwise
952 const char *MSG_task_get_category (m_task_t task)
955 return task->category;
961 #ifdef MSG_USE_DEPRECATED
962 /** \ingroup msg_deprecated_functions
964 * \brief Return the last value returned by a MSG function (except
967 MSG_error_t MSG_get_errno(void)
969 return PROCESS_GET_ERRNO();
972 /** \ingroup msg_deprecated_functions
973 * \brief Put a task on a channel of an host and waits for the end of the
976 * This function is used for describing the behavior of a process. It
977 * takes three parameter.
978 * \param task a #m_task_t to send on another location. This task
979 will not be usable anymore when the function will return. There is
980 no automatic task duplication and you have to save your parameters
981 before calling this function. Tasks are unique and once it has been
982 sent to another location, you should not access it anymore. You do
983 not need to call MSG_task_destroy() but to avoid using, as an
984 effect of inattention, this task anymore, you definitely should
985 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
986 can be transfered iff it has been correctly created with
988 * \param dest the destination of the message
989 * \param channel the channel on which the process should put this
990 task. This value has to be >=0 and < than the maximal number of
991 channels fixed with MSG_set_channel_number().
992 * \return #MSG_HOST_FAILURE if the host on which
993 * this function was called was shut down,
994 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
995 * (network failure, dest failure) or #MSG_OK if it succeeded.
997 MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel)
999 XBT_WARN("DEPRECATED! Now use MSG_task_send");
1000 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
1003 /** \ingroup msg_deprecated_functions
1004 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
1010 MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel,
1013 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
1014 task->simdata->rate = maxrate;
1015 return MSG_task_put(task, dest, channel);
1018 /** \ingroup msg_deprecated_functions
1020 * \brief Put a task on a channel of an
1021 * host (with a timeout on the waiting of the destination host) and
1022 * waits for the end of the transmission.
1024 * This function is used for describing the behavior of a process. It
1025 * takes four parameter.
1026 * \param task a #m_task_t to send on another location. This task
1027 will not be usable anymore when the function will return. There is
1028 no automatic task duplication and you have to save your parameters
1029 before calling this function. Tasks are unique and once it has been
1030 sent to another location, you should not access it anymore. You do
1031 not need to call MSG_task_destroy() but to avoid using, as an
1032 effect of inattention, this task anymore, you definitely should
1033 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
1034 can be transfered iff it has been correctly created with
1036 * \param dest the destination of the message
1037 * \param channel the channel on which the process should put this
1038 task. This value has to be >=0 and < than the maximal number of
1039 channels fixed with MSG_set_channel_number().
1040 * \param timeout the maximum time to wait for a task before giving
1041 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1042 will not be modified
1043 * \return #MSG_HOST_FAILURE if the host on which
1044 this function was called was shut down,
1045 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
1046 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
1049 MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
1050 m_channel_t channel, double timeout)
1052 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
1053 xbt_assert((channel >= 0)
1054 && (channel < msg_global->max_channel), "Invalid channel %d",
1057 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", SIMIX_host_get_name(dest->smx_host));
1059 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
1060 (dest, channel), task, timeout);
1063 /** \ingroup msg_deprecated_functions
1064 * \brief Test whether there is a pending communication on a channel, and who sent it.
1066 * It takes one parameter.
1067 * \param channel the channel on which the process should be
1068 listening. This value has to be >=0 and < than the maximal
1069 number of channels fixed with MSG_set_channel_number().
1070 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
1072 int MSG_task_probe_from(m_channel_t channel)
1074 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
1077 xbt_assert((channel >= 0)
1078 && (channel < msg_global->max_channel), "Invalid channel %d",
1083 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
1084 (MSG_host_self(), channel))))
1087 return MSG_process_get_PID(task->simdata->sender);
1090 /** \ingroup msg_deprecated_functions
1091 * \brief Test whether there is a pending communication on a channel.
1093 * It takes one parameter.
1094 * \param channel the channel on which the process should be
1095 listening. This value has to be >=0 and < than the maximal
1096 number of channels fixed with MSG_set_channel_number().
1097 * \return 1 if there is a pending communication and 0 otherwise
1099 int MSG_task_Iprobe(m_channel_t channel)
1101 XBT_WARN("DEPRECATED!");
1102 xbt_assert((channel >= 0)
1103 && (channel < msg_global->max_channel), "Invalid channel %d",
1107 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1108 (MSG_host_self(), channel));
1111 /** \ingroup msg_deprecated_functions
1113 * \brief Return the number of tasks waiting to be received on a \a
1114 channel and sent by \a host.
1116 * It takes two parameters.
1117 * \param channel the channel on which the process should be
1118 listening. This value has to be >=0 and < than the maximal
1119 number of channels fixed with MSG_set_channel_number().
1120 * \param host the host that is to be watched.
1121 * \return the number of tasks waiting to be received on \a channel
1122 and sent by \a host.
1124 int MSG_task_probe_from_host(int channel, m_host_t host)
1126 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1127 xbt_assert((channel >= 0)
1128 && (channel < msg_global->max_channel), "Invalid channel %d",
1132 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1133 (MSG_host_self(), channel),
1138 /** \ingroup msg_deprecated_functions
1139 * \brief Listen on \a channel and waits for receiving a task from \a host.
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 host the host that is to be watched.
1150 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1153 MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
1155 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1156 return MSG_task_get_ext(task, channel, -1, host);
1159 /** \ingroup msg_deprecated_functions
1160 * \brief Listen on a channel and wait for receiving a task.
1162 * It takes two parameters.
1163 * \param task a memory location for storing a #m_task_t. It will
1164 hold a task when this function will return. Thus \a task should not
1165 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1166 those two condition does not hold, there will be a warning message.
1167 * \param channel the channel on which the process should be
1168 listening. This value has to be >=0 and < than the maximal
1169 number of channels fixed with MSG_set_channel_number().
1170 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1172 MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel)
1174 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1175 return MSG_task_get_with_timeout(task, channel, -1);
1178 /** \ingroup msg_deprecated_functions
1179 * \brief Listen on a channel and wait for receiving a task with a timeout.
1181 * It takes three parameters.
1182 * \param task a memory location for storing a #m_task_t. It will
1183 hold a task when this function will return. Thus \a task should not
1184 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1185 those two condition does not hold, there will be a warning message.
1186 * \param channel the channel on which the process should be
1187 listening. This value has to be >=0 and < than the maximal
1188 number of channels fixed with MSG_set_channel_number().
1189 * \param max_duration the maximum time to wait for a task before giving
1190 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1191 will not be modified and will still be
1192 equal to \c NULL when returning.
1193 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1196 MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel,
1197 double max_duration)
1199 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1200 return MSG_task_get_ext(task, channel, max_duration, NULL);
1204 MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout,
1207 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1208 xbt_assert((channel >= 0)
1209 && (channel < msg_global->max_channel), "Invalid channel %d",
1213 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1214 (MSG_host_self(), channel), task, host,