1 /* Copyright (c) 2004-2011. 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_gos_functions
16 * \brief Executes a task and waits for its termination.
18 * This function is used for describing the behavior of an agent. It
19 * takes only one parameter.
20 * \param task a #m_task_t to execute on the location on which the
22 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
23 * or #MSG_HOST_FAILURE otherwise
25 MSG_error_t MSG_task_execute(m_task_t task)
27 simdata_task_t simdata = NULL;
28 simdata_process_t p_simdata;
29 e_smx_state_t comp_state;
32 simdata = task->simdata;
34 xbt_assert(simdata->host_nb == 0,
35 "This is a parallel task. Go to hell.");
38 TRACE_msg_task_execute_start(task);
41 xbt_assert((!simdata->compute) && (task->simdata->isused == 0),
42 "This task is executed somewhere else. Go fix your code! %d",
43 task->simdata->isused);
45 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
47 if (simdata->computation_amount == 0) {
49 TRACE_msg_task_execute_end(task);
54 m_process_t self = SIMIX_process_self();
55 p_simdata = SIMIX_process_self_get_data(self);
58 simcall_host_execute(task->name, p_simdata->m_host->simdata->smx_host,
59 simdata->computation_amount,
62 simcall_set_category(simdata->compute, task->category);
65 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);
72 if (comp_state == SIMIX_DONE) {
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);
81 } else if (simcall_host_get_state(SIMIX_host_self()) == 0) {
82 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
84 simdata->compute = NULL;
86 TRACE_msg_task_execute_end(task);
88 MSG_RETURN(MSG_HOST_FAILURE);
90 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
92 simdata->compute = NULL;
94 TRACE_msg_task_execute_end(task);
96 MSG_RETURN(MSG_TASK_CANCELED);
100 /** \ingroup m_task_management
101 * \brief Creates a new #m_task_t (a parallel one....).
103 * A constructor for #m_task_t taking six arguments and returning the
104 corresponding object.
105 * \param name a name for the object. It is for user-level information
107 * \param host_nb the number of hosts implied in the parallel task.
108 * \param host_list an array of \p host_nb m_host_t.
109 * \param computation_amount an array of \p host_nb
110 doubles. computation_amount[i] is the total number of operations
111 that have to be performed on host_list[i].
112 * \param communication_amount an array of \p host_nb* \p host_nb doubles.
113 * \param data a pointer to any data may want to attach to the new
114 object. It is for user-level information and can be NULL. It can
115 be retrieved with the function \ref MSG_task_get_data.
117 * \return The new corresponding object.
120 MSG_parallel_task_create(const char *name, int host_nb,
121 const m_host_t * host_list,
122 double *computation_amount,
123 double *communication_amount, void *data)
126 simdata_task_t simdata = xbt_new0(s_simdata_task_t, 1);
127 m_task_t task = xbt_new0(s_m_task_t, 1);
128 task->simdata = simdata;
131 task->name = xbt_strdup(name);
135 simdata->computation_amount = 0;
136 simdata->message_size = 0;
137 simdata->compute = NULL;
138 simdata->comm = NULL;
139 simdata->rate = -1.0;
141 simdata->sender = NULL;
142 simdata->receiver = NULL;
143 simdata->source = NULL;
145 simdata->host_nb = host_nb;
146 simdata->host_list = xbt_new0(smx_host_t, host_nb);
147 simdata->comp_amount = computation_amount;
148 simdata->comm_amount = communication_amount;
150 for (i = 0; i < host_nb; i++)
151 simdata->host_list[i] = host_list[i]->simdata->smx_host;
156 /** \ingroup msg_gos_functions
157 * \brief Executes a parallel task and waits for its termination.
159 * \param task a #m_task_t to execute on the location on which the agent is running.
161 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
162 * or #MSG_HOST_FAILURE otherwise
164 MSG_error_t MSG_parallel_task_execute(m_task_t task)
166 simdata_task_t simdata = NULL;
167 e_smx_state_t comp_state;
168 simdata_process_t p_simdata;
171 simdata = task->simdata;
172 p_simdata = SIMIX_process_self_get_data(SIMIX_process_self());
174 xbt_assert((!simdata->compute)
175 && (task->simdata->isused == 0),
176 "This task is executed somewhere else. Go fix your code!");
178 xbt_assert(simdata->host_nb,
179 "This is not a parallel task. Go to hell.");
181 XBT_DEBUG("Parallel computing on %s", p_simdata->m_host->name);
186 simcall_host_parallel_execute(task->name, simdata->host_nb,
188 simdata->comp_amount,
189 simdata->comm_amount, 1.0, -1.0);
190 XBT_DEBUG("Parallel execution action created: %p", simdata->compute);
192 p_simdata->waiting_action = simdata->compute;
193 comp_state = simcall_host_execution_wait(simdata->compute);
194 p_simdata->waiting_action = NULL;
196 XBT_DEBUG("Finished waiting for execution of action %p, state = %d", simdata->compute, (int)comp_state);
200 if (comp_state == SIMIX_DONE) {
201 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
202 simdata->computation_amount = 0.0;
203 simdata->comm = NULL;
204 simdata->compute = NULL;
206 } else if (simcall_host_get_state(SIMIX_host_self()) == 0) {
207 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
208 simdata->comm = NULL;
209 simdata->compute = NULL;
210 MSG_RETURN(MSG_HOST_FAILURE);
212 /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
213 simdata->comm = NULL;
214 simdata->compute = NULL;
215 MSG_RETURN(MSG_TASK_CANCELED);
220 /** \ingroup msg_gos_functions
221 * \brief Sleep for the specified number of seconds
223 * Makes the current process sleep until \a time seconds have elapsed.
225 * \param nb_sec a number of second
227 MSG_error_t MSG_process_sleep(double nb_sec)
230 /*m_process_t proc = MSG_process_self();*/
233 TRACE_msg_process_sleep_in(MSG_process_self());
236 /* create action to sleep */
237 state = simcall_process_sleep(nb_sec);
239 /*proc->simdata->waiting_action = act_sleep;
241 FIXME: check if not setting the waiting_action breaks something on msg
243 proc->simdata->waiting_action = NULL;*/
245 if (state == SIMIX_DONE) {
247 TRACE_msg_process_sleep_out(MSG_process_self());
252 TRACE_msg_process_sleep_out(MSG_process_self());
254 MSG_RETURN(MSG_HOST_FAILURE);
258 /** \ingroup msg_gos_functions
259 * \brief Receives a task from a mailbox from a specific host.
261 * This is a blocking function, the execution flow will be blocked
262 * until the task is received. See #MSG_task_irecv
263 * for receiving tasks asynchronously.
265 * \param task a memory location for storing a #m_task_t.
266 * \param alias name of the mailbox to receive the task from
267 * \param host a #m_host_t host from where the task was sent
270 * #MSG_OK if the task was successfully received,
271 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
274 MSG_task_receive_from_host(m_task_t * task, const char *alias,
277 return MSG_task_receive_ext(task, alias, -1, host);
280 /** \ingroup msg_gos_functions
281 * \brief Receives a task from a mailbox.
283 * This is a blocking function, the execution flow will be blocked
284 * until the task is received. See #MSG_task_irecv
285 * for receiving tasks asynchronously.
287 * \param task a memory location for storing a #m_task_t.
288 * \param alias name of the mailbox to receive the task from
291 * #MSG_OK if the task was successfully received,
292 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
294 MSG_error_t MSG_task_receive(m_task_t * task, const char *alias)
296 return MSG_task_receive_with_timeout(task, alias, -1);
299 /** \ingroup msg_gos_functions
300 * \brief Receives a task from a mailbox with a given timeout.
302 * This is a blocking function with a timeout, the execution flow will be blocked
303 * until the task is received or the timeout is achieved. See #MSG_task_irecv
304 * for receiving tasks asynchronously. You can provide a -1 timeout
305 * to obtain an infinite timeout.
307 * \param task a memory location for storing a #m_task_t.
308 * \param alias name of the mailbox to receive the task from
309 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
312 * #MSG_OK if the task was successfully received,
313 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
316 MSG_task_receive_with_timeout(m_task_t * task, const char *alias,
319 return MSG_task_receive_ext(task, alias, timeout, NULL);
322 /** \ingroup msg_gos_functions
323 * \brief Receives a task from a mailbox from a specific host with a given timeout.
325 * This is a blocking function with a timeout, the execution flow will be blocked
326 * until the task is received or the timeout is achieved. See #MSG_task_irecv
327 * for receiving tasks asynchronously. You can provide a -1 timeout
328 * to obtain an infinite timeout.
330 * \param task a memory location for storing a #m_task_t.
331 * \param alias name of the mailbox to receive the task from
332 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
333 * \param host a #m_host_t host from where the task was sent
336 * #MSG_OK if the task was successfully received,
337 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
340 MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout,
344 ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'",
346 return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task,
350 /** \ingroup msg_gos_functions
351 * \brief Sends a task on a mailbox.
353 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
354 * to end the communication.
356 * \param task a #m_task_t to send on another location.
357 * \param alias name of the mailbox to sent the task to
358 * \return the msg_comm_t communication created
360 msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
362 return MSG_task_isend_with_matching(task,alias,NULL,NULL);
365 /** \ingroup msg_gos_functions
366 * \brief Sends a task on a mailbox, with support for matching requests
368 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
369 * to end the communication.
371 * \param task a #m_task_t to send on another location.
372 * \param alias name of the mailbox to sent the task to
373 * \param match_fun boolean function taking the match_data provided by sender (here), and the one of the receiver (if any) and returning whether they match
374 * \param match_data user provided data passed to match_fun
375 * \return the msg_comm_t communication created
377 XBT_INLINE msg_comm_t MSG_task_isend_with_matching(m_task_t task, const char *alias,
378 int (*match_fun)(void*,void*),
381 simdata_task_t t_simdata = NULL;
382 m_process_t process = MSG_process_self();
383 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
387 /* FIXME: these functions are not traceable */
389 /* Prepare the task to send */
390 t_simdata = task->simdata;
391 t_simdata->sender = process;
392 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
394 xbt_assert(t_simdata->isused == 0,
395 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
397 t_simdata->isused = 1;
398 t_simdata->comm = NULL;
399 msg_global->sent_msg++;
401 /* Send it by calling SIMIX network layer */
402 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
403 comm->task_sent = task;
404 comm->task_received = NULL;
405 comm->status = MSG_OK;
407 simcall_comm_isend(mailbox, t_simdata->message_size,
408 t_simdata->rate, task, sizeof(void *), match_fun, NULL, match_data, 0);
409 t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
414 /** \ingroup msg_gos_functions
415 * \brief Sends a task on a mailbox.
417 * This is a non blocking detached send function.
418 * Think of it as a best effort send. Keep in mind that the third parameter
419 * is only called if the communication fails. If the communication does work,
420 * it is responsibility of the receiver code to free anything related to
421 * the task, as usual. More details on this can be obtained on
422 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
423 * in the SimGrid-user mailing list archive.
425 * \param task a #m_task_t to send on another location.
426 * \param alias name of the mailbox to sent the task to
427 * \param cleanup a function to destroy the task if the
428 * communication fails, e.g. MSG_task_destroy
429 * (if NULL, no function will be called)
431 void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
433 simdata_task_t t_simdata = NULL;
434 m_process_t process = MSG_process_self();
435 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
439 /* FIXME: these functions are not traceable */
441 /* Prepare the task to send */
442 t_simdata = task->simdata;
443 t_simdata->sender = process;
444 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data(process))->m_host;
446 xbt_assert(t_simdata->isused == 0,
447 "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
449 t_simdata->isused = 1;
450 t_simdata->comm = NULL;
451 msg_global->sent_msg++;
453 /* Send it by calling SIMIX network layer */
454 smx_action_t comm = simcall_comm_isend(mailbox, t_simdata->message_size,
455 t_simdata->rate, task, sizeof(void *), NULL, cleanup, NULL, 1);
456 t_simdata->comm = comm;
459 /** \ingroup msg_gos_functions
460 * \brief Starts listening for receiving a task from an asynchronous communication.
462 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
463 * to end the communication.
465 * \param task a memory location for storing a #m_task_t.
466 * \param name of the mailbox to receive the task on
467 * \return the msg_comm_t communication created
469 msg_comm_t MSG_task_irecv(m_task_t *task, const char *name)
471 smx_rdv_t rdv = MSG_mailbox_get_by_alias(name);
475 /* FIXME: these functions are not traceable */
478 xbt_assert(task, "Null pointer for the task storage");
482 ("MSG_task_irecv() was asked to write in a non empty task struct.");
484 /* Try to receive it by calling SIMIX network layer */
485 msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
486 comm->task_sent = NULL;
487 comm->task_received = task;
488 comm->status = MSG_OK;
489 comm->s_comm = simcall_comm_irecv(rdv, task, NULL, NULL, NULL);
494 /** \ingroup msg_gos_functions
495 * \brief Checks whether a communication is done, and if yes, finalizes it.
496 * \param comm the communication to test
497 * \return TRUE if the communication is finished
498 * (but it may have failed, use MSG_comm_get_status() to know its status)
499 * or FALSE if the communication is not finished yet
500 * If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
502 int MSG_comm_test(msg_comm_t comm)
507 finished = simcall_comm_test(comm->s_comm);
509 if (finished && comm->task_received != NULL) {
510 /* I am the receiver */
511 (*comm->task_received)->simdata->isused = 0;
515 switch (e.category) {
518 comm->status = MSG_HOST_FAILURE;
523 comm->status = MSG_TRANSFER_FAILURE;
528 comm->status = MSG_TIMEOUT;
541 /** \ingroup msg_gos_functions
542 * \brief This function checks if a communication is finished.
543 * \param comms a vector of communications
544 * \return the position of the finished communication if any
545 * (but it may have failed, use MSG_comm_get_status() to know its status),
546 * or -1 if none is finished
548 int MSG_comm_testany(xbt_dynar_t comms)
551 int finished_index = -1;
553 /* create the equivalent dynar with SIMIX objects */
554 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
557 xbt_dynar_foreach(comms, cursor, comm) {
558 xbt_dynar_push(s_comms, &comm->s_comm);
561 MSG_error_t status = MSG_OK;
563 finished_index = simcall_comm_testany(s_comms);
566 switch (e.category) {
569 finished_index = e.value;
570 status = MSG_HOST_FAILURE;
574 finished_index = e.value;
575 status = MSG_TRANSFER_FAILURE;
579 finished_index = e.value;
580 status = MSG_TIMEOUT;
588 xbt_dynar_free(&s_comms);
590 if (finished_index != -1) {
591 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
592 /* the communication is finished */
593 comm->status = status;
595 if (status == MSG_OK && comm->task_received != NULL) {
596 /* I am the receiver */
597 (*comm->task_received)->simdata->isused = 0;
601 return finished_index;
604 /** \ingroup msg_gos_functions
605 * \brief Destroys a communication.
606 * \param comm the communication to destroy.
608 void MSG_comm_destroy(msg_comm_t comm)
613 /** \ingroup msg_gos_functions
614 * \brief Wait for the completion of a communication.
616 * It takes two parameters.
617 * \param comm the communication to wait.
618 * \param timeout Wait until the communication terminates or the timeout occurs
619 * \return MSG_error_t
621 MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
625 simcall_comm_wait(comm->s_comm, timeout);
627 if (comm->task_received != NULL) {
628 /* I am the receiver */
629 (*comm->task_received)->simdata->isused = 0;
632 /* FIXME: these functions are not traceable */
635 switch (e.category) {
637 comm->status = MSG_HOST_FAILURE;
640 comm->status = MSG_TRANSFER_FAILURE;
643 comm->status = MSG_TIMEOUT;
654 /** \ingroup msg_gos_functions
655 * \brief This function is called by a sender and permit to wait for each communication
657 * \param comm a vector of communication
658 * \param nb_elem is the size of the comm vector
659 * \param timeout for each call of MSG_comm_wait
661 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
664 for (i = 0; i < nb_elem; i++) {
665 MSG_comm_wait(comm[i], timeout);
669 /** \ingroup msg_gos_functions
670 * \brief This function waits for the first communication finished in a list.
671 * \param comms a vector of communications
672 * \return the position of the first finished communication
673 * (but it may have failed, use MSG_comm_get_status() to know its status)
675 int MSG_comm_waitany(xbt_dynar_t comms)
678 int finished_index = -1;
680 /* create the equivalent dynar with SIMIX objects */
681 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
684 xbt_dynar_foreach(comms, cursor, comm) {
685 xbt_dynar_push(s_comms, &comm->s_comm);
688 MSG_error_t status = MSG_OK;
690 finished_index = simcall_comm_waitany(s_comms);
693 switch (e.category) {
696 finished_index = e.value;
697 status = MSG_HOST_FAILURE;
701 finished_index = e.value;
702 status = MSG_TRANSFER_FAILURE;
706 finished_index = e.value;
707 status = MSG_TIMEOUT;
716 xbt_assert(finished_index != -1, "WaitAny returned -1");
717 xbt_dynar_free(&s_comms);
719 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
720 /* the communication is finished */
721 comm->status = status;
723 if (comm->task_received != NULL) {
724 /* I am the receiver */
725 (*comm->task_received)->simdata->isused = 0;
728 return finished_index;
732 * \ingroup msg_gos_functions
733 * \brief Returns the error (if any) that occured during a finished communication.
734 * \param comm a finished communication
735 * \return the status of the communication, or #MSG_OK if no error occured
736 * during the communication
738 MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
743 /** \ingroup msg_gos_functions
744 * \brief Get a task (#m_task_t) from a communication
746 * \param comm the communication where to get the task
747 * \return the task from the communication
749 m_task_t MSG_comm_get_task(msg_comm_t comm)
751 xbt_assert(comm, "Invalid parameter");
753 return comm->task_received ? *comm->task_received : comm->task_sent;
757 * \brief This function is called by SIMIX to copy the data of a comm.
758 * \param comm the comm
759 * \param buff the data copied
760 * \param buff_size size of the buffer
762 void MSG_comm_copy_data_from_SIMIX(smx_action_t comm, void* buff, size_t buff_size) {
765 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
767 // notify the user callback if any
768 if (msg_global->task_copy_callback) {
769 m_task_t task = buff;
770 msg_global->task_copy_callback(task,
771 simcall_comm_get_src_proc(comm), simcall_comm_get_dst_proc(comm));
775 /** \ingroup msg_gos_functions
776 * \brief Sends a task to a mailbox
778 * This is a blocking function, the execution flow will be blocked
779 * until the task is sent (and received in the other side if #MSG_task_receive is used).
780 * See #MSG_task_isend for sending tasks asynchronously.
782 * \param task the task to be sent
783 * \param alias the mailbox name to where the task is sent
785 * \return Returns #MSG_OK if the task was successfully sent,
786 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
788 MSG_error_t MSG_task_send(m_task_t task, const char *alias)
790 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
791 return MSG_task_send_with_timeout(task, alias, -1);
794 /** \ingroup msg_gos_functions
795 * \brief Sends a task to a mailbox with a maximum rate
797 * This is a blocking function, the execution flow will be blocked
798 * until the task is sent. The maxrate parameter allows the application
799 * to limit the bandwidth utilization of network links when sending the task.
801 * \param task the task to be sent
802 * \param alias the mailbox name to where the task is sent
803 * \param maxrate the maximum communication rate for sending this task
805 * \return Returns #MSG_OK if the task was successfully sent,
806 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
809 MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate)
811 task->simdata->rate = maxrate;
812 return MSG_task_send(task, alias);
815 /** \ingroup msg_gos_functions
816 * \brief Sends a task to a mailbox with a timeout
818 * This is a blocking function, the execution flow will be blocked
819 * until the task is sent or the timeout is achieved.
821 * \param task the task to be sent
822 * \param alias the mailbox name to where the task is sent
823 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
825 * \return Returns #MSG_OK if the task was successfully sent,
826 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
829 MSG_task_send_with_timeout(m_task_t task, const char *alias,
832 return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias),
836 /** \ingroup msg_gos_functions
837 * \brief Check if there is a communication going on in a mailbox.
839 * \param alias the name of the mailbox to be considered
841 * \return Returns 1 if there is a communication, 0 otherwise
843 int MSG_task_listen(const char *alias)
847 return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
850 /** \ingroup msg_gos_functions
851 * \brief Check the number of communication actions of a given host pending in a mailbox.
853 * \param alias the name of the mailbox to be considered
854 * \param host the host to check for communication
856 * \return Returns the number of pending communication actions of the host in the
857 * given mailbox, 0 if there is no pending communication actions.
860 int MSG_task_listen_from_host(const char *alias, m_host_t host)
865 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias
869 /** \ingroup msg_gos_functions
870 * \brief Look if there is a communication on a mailbox and return the
871 * PID of the sender process.
873 * \param alias the name of the mailbox to be considered
875 * \return Returns the PID of sender process,
876 * -1 if there is no communication in the mailbox.
878 int MSG_task_listen_from(const char *alias)
885 (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
888 return MSG_process_get_PID(task->simdata->sender);
891 #ifdef MSG_USE_DEPRECATED
892 /** \ingroup msg_gos_functions
894 * \brief Return the last value returned by a MSG function (except
897 MSG_error_t MSG_get_errno(void)
899 return PROCESS_GET_ERRNO();
902 /** \ingroup msg_gos_functions
903 * \brief Put a task on a channel of an host and waits for the end of the
906 * This function is used for describing the behavior of an agent. It
907 * takes three parameter.
908 * \param task a #m_task_t to send on another location. This task
909 will not be usable anymore when the function will return. There is
910 no automatic task duplication and you have to save your parameters
911 before calling this function. Tasks are unique and once it has been
912 sent to another location, you should not access it anymore. You do
913 not need to call MSG_task_destroy() but to avoid using, as an
914 effect of inattention, this task anymore, you definitely should
915 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
916 can be transfered iff it has been correctly created with
918 * \param dest the destination of the message
919 * \param channel the channel on which the agent should put this
920 task. This value has to be >=0 and < than the maximal number of
921 channels fixed with MSG_set_channel_number().
922 * \return #MSG_HOST_FAILURE if the host on which
923 * this function was called was shut down,
924 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
925 * (network failure, dest failure) or #MSG_OK if it succeeded.
927 MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel)
929 XBT_WARN("DEPRECATED! Now use MSG_task_send");
930 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
933 /** \ingroup msg_gos_functions
934 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
940 MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel,
943 XBT_WARN("DEPRECATED! Now use MSG_task_send_bounded");
944 task->simdata->rate = maxrate;
945 return MSG_task_put(task, dest, channel);
948 /** \ingroup msg_gos_functions \brief Put a task on a channel of an
949 * host (with a timeout on the waiting of the destination host) and
950 * waits for the end of the transmission.
952 * This function is used for describing the behavior of an agent. It
953 * takes four parameter.
954 * \param task a #m_task_t to send on another location. This task
955 will not be usable anymore when the function will return. There is
956 no automatic task duplication and you have to save your parameters
957 before calling this function. Tasks are unique and once it has been
958 sent to another location, you should not access it anymore. You do
959 not need to call MSG_task_destroy() but to avoid using, as an
960 effect of inattention, this task anymore, you definitely should
961 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
962 can be transfered iff it has been correctly created with
964 * \param dest the destination of the message
965 * \param channel the channel on which the agent should put this
966 task. This value has to be >=0 and < than the maximal number of
967 channels fixed with MSG_set_channel_number().
968 * \param timeout the maximum time to wait for a task before giving
969 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
971 * \return #MSG_HOST_FAILURE if the host on which
972 this function was called was shut down,
973 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
974 (network failure, dest failure, timeout...) or #MSG_OK if the communication succeeded.
977 MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
978 m_channel_t channel, double timeout)
980 XBT_WARN("DEPRECATED! Now use MSG_task_send_with_timeout");
981 xbt_assert((channel >= 0)
982 && (channel < msg_global->max_channel), "Invalid channel %d",
985 XBT_DEBUG("MSG_task_put_with_timout: Trying to send a task to '%s'", dest->name);
987 MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
988 (dest, channel), task, timeout);
991 /** \ingroup msg_gos_functions
992 * \brief Test whether there is a pending communication on a channel, and who sent it.
994 * It takes one parameter.
995 * \param channel the channel on which the agent should be
996 listening. This value has to be >=0 and < than the maximal
997 number of channels fixed with MSG_set_channel_number().
998 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
1000 int MSG_task_probe_from(m_channel_t channel)
1002 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from");
1007 xbt_assert((channel >= 0)
1008 && (channel < msg_global->max_channel), "Invalid channel %d",
1013 MSG_mailbox_get_head(MSG_mailbox_get_by_channel
1014 (MSG_host_self(), channel))))
1017 return MSG_process_get_PID(task->simdata->sender);
1020 /** \ingroup msg_gos_functions
1021 * \brief Test whether there is a pending communication on a channel.
1023 * It takes one parameter.
1024 * \param channel the channel on which the agent 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 a pending communication and 0 otherwise
1029 int MSG_task_Iprobe(m_channel_t channel)
1031 XBT_WARN("DEPRECATED!");
1032 xbt_assert((channel >= 0)
1033 && (channel < msg_global->max_channel), "Invalid channel %d",
1039 !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel
1040 (MSG_host_self(), channel));
1043 /** \ingroup msg_gos_functions
1045 * \brief Return the number of tasks waiting to be received on a \a
1046 channel and sent by \a host.
1048 * It takes two parameters.
1049 * \param channel the channel on which the agent should be
1050 listening. This value has to be >=0 and < than the maximal
1051 number of channels fixed with MSG_set_channel_number().
1052 * \param host the host that is to be watched.
1053 * \return the number of tasks waiting to be received on \a channel
1054 and sent by \a host.
1056 int MSG_task_probe_from_host(int channel, m_host_t host)
1058 XBT_WARN("DEPRECATED! Now use MSG_task_listen_from_host");
1059 xbt_assert((channel >= 0)
1060 && (channel < msg_global->max_channel), "Invalid channel %d",
1066 MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel
1067 (MSG_host_self(), channel),
1072 /** \ingroup msg_gos_functions
1073 * \brief Listen on \a channel and waits for receiving a task from \a host.
1075 * It takes three parameters.
1076 * \param task a memory location for storing a #m_task_t. It will
1077 hold a task when this function will return. Thus \a task should not
1078 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1079 those two condition does not hold, there will be a warning message.
1080 * \param channel the channel on which the agent should be
1081 listening. This value has to be >=0 and < than the maximal
1082 number of channels fixed with MSG_set_channel_number().
1083 * \param host the host that is to be watched.
1084 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1087 MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
1089 XBT_WARN("DEPRECATED! Now use MSG_task_receive_from_host");
1090 return MSG_task_get_ext(task, channel, -1, host);
1093 /** \ingroup msg_gos_functions
1094 * \brief Listen on a channel and wait for receiving a task.
1096 * It takes two parameters.
1097 * \param task a memory location for storing a #m_task_t. It will
1098 hold a task when this function will return. Thus \a task should not
1099 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1100 those two condition does not hold, there will be a warning message.
1101 * \param channel the channel on which the agent should be
1102 listening. This value has to be >=0 and < than the maximal
1103 number of channels fixed with MSG_set_channel_number().
1104 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1106 MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel)
1108 XBT_WARN("DEPRECATED! Now use MSG_task_receive");
1109 return MSG_task_get_with_timeout(task, channel, -1);
1112 /** \ingroup msg_gos_functions
1113 * \brief Listen on a channel and wait for receiving a task with a timeout.
1115 * It takes three parameters.
1116 * \param task a memory location for storing a #m_task_t. It will
1117 hold a task when this function will return. Thus \a task should not
1118 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
1119 those two condition does not hold, there will be a warning message.
1120 * \param channel the channel on which the agent should be
1121 listening. This value has to be >=0 and < than the maximal
1122 number of channels fixed with MSG_set_channel_number().
1123 * \param max_duration the maximum time to wait for a task before giving
1124 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
1125 will not be modified and will still be
1126 equal to \c NULL when returning.
1127 * \return a #MSG_error_t indicating whether the operation was successful (#MSG_OK), or why it failed otherwise.
1130 MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel,
1131 double max_duration)
1133 XBT_WARN("DEPRECATED! Now use MSG_task_receive_with_timeout");
1134 return MSG_task_get_ext(task, channel, max_duration, NULL);
1138 MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout,
1141 XBT_WARN("DEPRECATED! Now use MSG_task_receive_ext");
1142 xbt_assert((channel >= 0)
1143 && (channel < msg_global->max_channel), "Invalid channel %d",
1147 MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel
1148 (MSG_host_self(), channel), task, host,