3 /* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/sysdep.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
12 "Logging specific to MSG (gos)");
14 /** \defgroup msg_gos_functions MSG Operating System Functions
15 * \brief This section describes the functions that can be used
16 * by an agent for handling some task.
19 static MSG_error_t __MSG_task_get_with_time_out_from_host(m_task_t * task,
24 m_process_t process = MSG_process_self();
27 simdata_task_t t_simdata = NULL;
28 simdata_host_t h_simdata = NULL;
30 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
31 xbt_fifo_item_t item = NULL;
34 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
36 xbt_assert0(task,"Null pointer for the task\n");
39 CRITICAL0("MSG_task_get() was asked to write in a non empty task struct.");
43 h_simdata = h->simdata;
45 DEBUG2("Waiting for a task on channel %d (%s)", channel,h->name);
48 if(xbt_fifo_size(h_simdata->mbox[channel])>0) {
50 t = xbt_fifo_shift(h_simdata->mbox[channel]);
53 xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
54 if(t->simdata->source==host) break;
57 xbt_fifo_remove_item(h->simdata->mbox[channel],item);
65 PAJE_PROCESS_POP_STATE(process);
66 PAJE_COMM_STOP(process,t,channel);
67 MSG_RETURN(MSG_TRANSFER_FAILURE);
70 xbt_assert3(!(h_simdata->sleeping[channel]),
71 "A process (%s(%d)) is already blocked on channel %d",
72 h_simdata->sleeping[channel]->name,
73 h_simdata->sleeping[channel]->simdata->PID,
75 h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */
77 __MSG_process_block(max_duration,"");
79 __MSG_process_block(-1,"");
81 h_simdata->sleeping[channel] = NULL;
83 if(surf_workstation_resource->extension_public->get_state(h_simdata->host)
85 MSG_RETURN(MSG_HOST_FAILURE);
86 /* OK, we should both be ready now. Are you there ? */
89 DEBUG1("OK, got a task (%s)", t->name);
91 t_simdata = t->simdata;
92 /* *task = __MSG_task_copy(t); */
98 while(MSG_process_is_suspended(t_simdata->sender)) {
99 DEBUG1("Oooups, the sender (%s) has been suspended in the meantime. Let's wait for him",
100 t_simdata->sender->name);
101 m_task_t task_to_wait_for = t_simdata->sender->simdata->waiting_task;
102 if(__MSG_process_isBlocked(t_simdata->sender)) {
103 DEBUG0("He's blocked. Let's wait for him to go in the suspended state");
104 __MSG_process_unblock(t_simdata->sender);
105 task_to_wait_for->simdata->using++;
106 __MSG_task_wait_event(process, task_to_wait_for);
107 MSG_task_destroy(task_to_wait_for);
109 DEBUG0("He's suspended. Let's wait for him to go in the resumed state");
110 task_to_wait_for->simdata->using++;
111 __MSG_task_wait_event(process, task_to_wait_for);
112 MSG_task_destroy(task_to_wait_for);
113 DEBUG0("He's resumed. He should block again. So let's free him.");
114 __MSG_process_unblock(t_simdata->sender);
118 DEBUG0("Calling SURF for communication creation");
119 t_simdata->comm = surf_workstation_resource->extension_public->
120 communicate(MSG_process_get_host(t_simdata->sender)->simdata->host,
121 h->simdata->host, t_simdata->message_size,t_simdata->rate);
123 surf_workstation_resource->common_public->action_set_data(t_simdata->comm,t);
125 if(__MSG_process_isBlocked(t_simdata->sender)) {
126 DEBUG1("Unblocking %s",t_simdata->sender->name);
127 __MSG_process_unblock(t_simdata->sender);
130 PAJE_PROCESS_PUSH_STATE(process,"C",t);
133 DEBUG0("Waiting for action termination");
134 __MSG_task_wait_event(process, t);
135 state=surf_workstation_resource->common_public->action_get_state(t_simdata->comm);
136 } while (state==SURF_ACTION_RUNNING);
137 DEBUG0("Action terminated");
139 if(t->simdata->using>1) {
140 xbt_fifo_unshift(msg_global->process_to_run,process);
144 PAJE_PROCESS_POP_STATE(process);
145 PAJE_COMM_STOP(process,t,channel);
147 if(state == SURF_ACTION_DONE) {
148 if(surf_workstation_resource->common_public->action_free(t_simdata->comm))
149 t_simdata->comm = NULL;
151 } else if(surf_workstation_resource->extension_public->get_state(h_simdata->host)
153 if(surf_workstation_resource->common_public->action_free(t_simdata->comm))
154 t_simdata->comm = NULL;
155 MSG_RETURN(MSG_HOST_FAILURE);
157 if(surf_workstation_resource->common_public->action_free(t_simdata->comm))
158 t_simdata->comm = NULL;
159 MSG_RETURN(MSG_TRANSFER_FAILURE);
163 /** \ingroup msg_gos_functions
164 * \brief Listen on a channel and wait for receiving a task.
166 * It takes two parameters.
167 * \param task a memory location for storing a #m_task_t. It will
168 hold a task when this function will return. Thus \a task should not
169 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
170 those two condition does not hold, there will be a warning message.
171 * \param channel the channel on which the agent should be
172 listening. This value has to be >=0 and < than the maximal
173 number of channels fixed with MSG_set_channel_number().
174 * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
175 * if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
177 MSG_error_t MSG_task_get(m_task_t * task,
180 return MSG_task_get_with_time_out(task, channel, -1);
183 /** \ingroup msg_gos_functions
184 * \brief Listen on a channel and wait for receiving a task with a timeout.
186 * It takes three parameters.
187 * \param task a memory location for storing a #m_task_t. It will
188 hold a task when this function will return. Thus \a task should not
189 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
190 those two condition does not hold, there will be a warning message.
191 * \param channel the channel on which the agent should be
192 listening. This value has to be >=0 and < than the maximal
193 number of channels fixed with MSG_set_channel_number().
194 * \param max_duration the maximum time to wait for a task before giving
195 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
196 will not be modified and will still be
197 equal to \c NULL when returning.
198 * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
199 if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
201 MSG_error_t MSG_task_get_with_time_out(m_task_t * task,
205 return __MSG_task_get_with_time_out_from_host(task, channel, max_duration, NULL);
208 /** \ingroup msg_gos_functions
209 * \brief Listen on \a channel and waits for receiving a task from \a host.
211 * It takes three parameters.
212 * \param task a memory location for storing a #m_task_t. It will
213 hold a task when this function will return. Thus \a task should not
214 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
215 those two condition does not hold, there will be a warning message.
216 * \param channel the channel on which the agent should be
217 listening. This value has to be >=0 and < than the maximal
218 number of channels fixed with MSG_set_channel_number().
219 * \param host the host that is to be watched.
220 * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
221 if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
223 MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel,
226 return __MSG_task_get_with_time_out_from_host(task, channel, -1, host);
229 /** \ingroup msg_gos_functions
230 * \brief Test whether there is a pending communication on a channel.
232 * It takes one parameter.
233 * \param channel the channel on which the agent should be
234 listening. This value has to be >=0 and < than the maximal
235 number of channels fixed with MSG_set_channel_number().
236 * \return 1 if there is a pending communication and 0 otherwise
238 int MSG_task_Iprobe(m_channel_t channel)
241 simdata_host_t h_simdata = NULL;
243 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
244 DEBUG2("Probing on channel %d (%s)", channel,h->name);
247 h_simdata = h->simdata;
248 return(xbt_fifo_get_first_item(h_simdata->mbox[channel])!=NULL);
251 /** \ingroup msg_gos_functions
252 * \brief Test whether there is a pending communication on a channel, and who sent it.
254 * It takes one parameter.
255 * \param channel the channel on which the agent should be
256 listening. This value has to be >=0 and < than the maximal
257 number of channels fixed with MSG_set_channel_number().
258 * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
260 int MSG_task_probe_from(m_channel_t channel)
263 simdata_host_t h_simdata = NULL;
264 xbt_fifo_item_t item;
267 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
270 h_simdata = h->simdata;
272 DEBUG2("Probing on channel %d (%s)", channel,h->name);
274 item = xbt_fifo_get_first_item(h->simdata->mbox[channel]);
275 if (!item || !(t = xbt_fifo_get_item_content(item)))
278 return MSG_process_get_PID(t->simdata->sender);
281 /** \ingroup msg_gos_functions
282 * \brief Wait for at most \a max_duration second for a task reception
283 on \a channel. *\a PID is updated with the PID of the first process
284 that triggered this event if any.
286 * It takes three parameters:
287 * \param channel the channel on which the agent should be
288 listening. This value has to be >=0 and < than the maximal.
289 number of channels fixed with MSG_set_channel_number().
290 * \param PID a memory location for storing an int.
291 * \param max_duration the maximum time to wait for a task before
292 giving up. In the case of a reception, *\a PID will be updated
293 with the PID of the first process to send a task.
294 * \return #MSG_HOST_FAILURE if the host is shut down in the meantime
295 and #MSG_OK otherwise.
297 MSG_error_t MSG_channel_select_from(m_channel_t channel, double max_duration,
301 simdata_host_t h_simdata = NULL;
302 xbt_fifo_item_t item;
305 m_process_t process = MSG_process_self();
307 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
312 if(max_duration==0.0) {
313 *PID = MSG_task_probe_from(channel);
318 h_simdata = h->simdata;
320 DEBUG2("Probing on channel %d (%s)", channel,h->name);
321 while(!(item = xbt_fifo_get_first_item(h->simdata->mbox[channel]))) {
327 xbt_assert2(!(h_simdata->sleeping[channel]),
328 "A process (%s(%d)) is already blocked on this channel",
329 h_simdata->sleeping[channel]->name,
330 h_simdata->sleeping[channel]->simdata->PID);
331 h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */
333 __MSG_process_block(max_duration,"");
335 __MSG_process_block(-1,"");
337 if(surf_workstation_resource->extension_public->get_state(h_simdata->host)
339 MSG_RETURN(MSG_HOST_FAILURE);
341 h_simdata->sleeping[channel] = NULL;
344 if (!item || !(t = xbt_fifo_get_item_content(item))) {
348 *PID = MSG_process_get_PID(t->simdata->sender);
355 /** \ingroup msg_gos_functions
357 * \brief Return the number of tasks waiting to be received on a \a
358 channel and sent by \a host.
360 * It takes two parameters.
361 * \param channel the channel on which the agent should be
362 listening. This value has to be >=0 and < than the maximal
363 number of channels fixed with MSG_set_channel_number().
364 * \param host the host that is to be watched.
365 * \return the number of tasks waiting to be received on \a channel
368 int MSG_task_probe_from_host(int channel, m_host_t host)
370 simdata_host_t h_simdata = NULL;
371 xbt_fifo_item_t item;
376 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
379 h_simdata = h->simdata;
381 DEBUG2("Probing on channel %d (%s)", channel,h->name);
383 xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
384 if(t->simdata->source==host) count++;
390 /** \ingroup msg_gos_functions \brief Put a task on a channel of an
391 * host (with a timeout on the waiting of the destination host) and
392 * waits for the end of the transmission.
394 * This function is used for describing the behavior of an agent. It
395 * takes four parameter.
396 * \param task a #m_task_t to send on another location. This task
397 will not be usable anymore when the function will return. There is
398 no automatic task duplication and you have to save your parameters
399 before calling this function. Tasks are unique and once it has been
400 sent to another location, you should not access it anymore. You do
401 not need to call MSG_task_destroy() but to avoid using, as an
402 effect of inattention, this task anymore, you definitely should
403 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
404 can be transfered iff it has been correctly created with
406 * \param dest the destination of the message
407 * \param channel the channel on which the agent should put this
408 task. This value has to be >=0 and < than the maximal number of
409 channels fixed with MSG_set_channel_number().
410 * \param max_duration the maximum time to wait for a task before giving
411 up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task
413 * \return #MSG_FATAL if \a task is not properly initialized and
414 #MSG_OK otherwise. Returns #MSG_HOST_FAILURE if the host on which
415 this function was called was shut down. Returns
416 #MSG_TRANSFER_FAILURE if the transfer could not be properly done
417 (network failure, dest failure, timeout...)
419 MSG_error_t MSG_task_put_with_timeout(m_task_t task, m_host_t dest,
420 m_channel_t channel, double max_duration)
422 m_process_t process = MSG_process_self();
423 simdata_task_t task_simdata = NULL;
424 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
425 m_host_t local_host = NULL;
426 m_host_t remote_host = NULL;
431 xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
433 task_simdata = task->simdata;
434 task_simdata->sender = process;
435 task_simdata->source = MSG_process_get_host(process);
436 xbt_assert0(task_simdata->using==1,
437 "This taks is still being used somewhere else. You cannot send it now. Go fix your code!");
438 task_simdata->comm = NULL;
440 local_host = ((simdata_process_t) process->simdata)->host;
443 DEBUG4("Trying to send a task (%g kB) from %s to %s on channel %d",
444 task->simdata->message_size/1000,local_host->name, remote_host->name, channel);
446 xbt_fifo_push(((simdata_host_t) remote_host->simdata)->
447 mbox[channel], task);
449 PAJE_COMM_START(process,task,channel);
451 if(remote_host->simdata->sleeping[channel]) {
452 DEBUG0("Somebody is listening. Let's wake him up!");
453 __MSG_process_unblock(remote_host->simdata->sleeping[channel]);
456 process->simdata->put_host = dest;
457 process->simdata->put_channel = channel;
458 while(!(task_simdata->comm)) {
461 MSG_RETURN(MSG_TRANSFER_FAILURE);
464 DEBUG0("Communication not initiated yet. Let's block!");
466 __MSG_process_block(max_duration,task->name);
468 __MSG_process_block(-1,task->name);
472 if(surf_workstation_resource->extension_public->
473 get_state(local_host->simdata->host) == SURF_CPU_OFF) {
474 xbt_fifo_remove(((simdata_host_t) remote_host->simdata)->mbox[channel],
476 MSG_task_destroy(task);
477 MSG_RETURN(MSG_HOST_FAILURE);
480 DEBUG0("Registering to this communication");
481 surf_workstation_resource->common_public->action_use(task_simdata->comm);
482 process->simdata->put_host = NULL;
483 process->simdata->put_channel = -1;
486 PAJE_PROCESS_PUSH_STATE(process,"C",task);
488 state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
489 while (state==SURF_ACTION_RUNNING) {
490 DEBUG0("Waiting for action termination");
491 __MSG_task_wait_event(process, task);
492 state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
494 DEBUG0("Action terminated");
495 task->simdata->rate=-1.0; /* Sets the rate back to default */
497 PAJE_PROCESS_POP_STATE(process);
499 if(state == SURF_ACTION_DONE) {
500 if(surf_workstation_resource->common_public->action_free(task_simdata->comm))
501 task_simdata->comm = NULL;
502 MSG_task_destroy(task);
504 } else if(surf_workstation_resource->extension_public->get_state(local_host->simdata->host)
506 if(surf_workstation_resource->common_public->action_free(task_simdata->comm))
507 task_simdata->comm = NULL;
508 MSG_task_destroy(task);
509 MSG_RETURN(MSG_HOST_FAILURE);
511 if(surf_workstation_resource->common_public->action_free(task_simdata->comm))
512 task_simdata->comm = NULL;
513 MSG_task_destroy(task);
514 MSG_RETURN(MSG_TRANSFER_FAILURE);
517 /** \ingroup msg_gos_functions
518 * \brief Put a task on a channel of an host and waits for the end of the
521 * This function is used for describing the behavior of an agent. It
522 * takes three parameter.
523 * \param task a #m_task_t to send on another location. This task
524 will not be usable anymore when the function will return. There is
525 no automatic task duplication and you have to save your parameters
526 before calling this function. Tasks are unique and once it has been
527 sent to another location, you should not access it anymore. You do
528 not need to call MSG_task_destroy() but to avoid using, as an
529 effect of inattention, this task anymore, you definitely should
530 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
531 can be transfered iff it has been correctly created with
533 * \param dest the destination of the message
534 * \param channel the channel on which the agent should put this
535 task. This value has to be >=0 and < than the maximal number of
536 channels fixed with MSG_set_channel_number().
537 * \return #MSG_FATAL if \a task is not properly initialized and
538 * #MSG_OK otherwise. Returns #MSG_HOST_FAILURE if the host on which
539 * this function was called was shut down. Returns
540 * #MSG_TRANSFER_FAILURE if the transfer could not be properly done
541 * (network failure, dest failure)
543 MSG_error_t MSG_task_put(m_task_t task,
544 m_host_t dest, m_channel_t channel)
546 return MSG_task_put_with_timeout(task, dest, channel, -1.0);
549 /** \ingroup msg_gos_functions
550 * \brief Does exactly the same as MSG_task_put but with a bounded transmition
555 MSG_error_t MSG_task_put_bounded(m_task_t task,
556 m_host_t dest, m_channel_t channel,
559 MSG_error_t res = MSG_OK;
560 task->simdata->rate=max_rate;
561 res = MSG_task_put(task, dest, channel);
565 /** \ingroup msg_gos_functions
566 * \brief Executes a task and waits for its termination.
568 * This function is used for describing the behavior of an agent. It
569 * takes only one parameter.
570 * \param task a #m_task_t to execute on the location on which the
572 * \return #MSG_FATAL if \a task is not properly initialized and
575 MSG_error_t MSG_task_execute(m_task_t task)
577 m_process_t process = MSG_process_self();
580 DEBUG1("Computing on %s", process->simdata->host->name);
582 __MSG_task_execute(process, task);
584 PAJE_PROCESS_PUSH_STATE(process,"E",task);
585 res = __MSG_wait_for_computation(process,task);
586 PAJE_PROCESS_POP_STATE(process);
590 void __MSG_task_execute(m_process_t process, m_task_t task)
592 simdata_task_t simdata = NULL;
596 simdata = task->simdata;
597 xbt_assert0((!simdata->compute)&&(task->simdata->using==1),
598 "This taks is executed somewhere else. Go fix your code!");
599 task->simdata->using++;
600 simdata->compute = surf_workstation_resource->extension_public->
601 execute(MSG_process_get_host(process)->simdata->host,
602 simdata->computation_amount);
603 surf_workstation_resource->common_public->
604 set_priority(simdata->compute, simdata->priority);
606 surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
607 task->simdata->using--;
610 MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task)
612 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
613 simdata_task_t simdata = task->simdata;
615 XBT_IN4("(%p(%s) %p(%s))",process,process->name,task,task->name);
618 __MSG_task_wait_event(process, task);
619 state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
620 } while (state==SURF_ACTION_RUNNING);
624 if(state == SURF_ACTION_DONE) {
625 if(surf_workstation_resource->common_public->action_free(simdata->compute))
626 simdata->compute = NULL;
627 simdata->computation_amount = 0.0;
630 } else if(surf_workstation_resource->extension_public->
631 get_state(MSG_process_get_host(process)->simdata->host)
633 if(surf_workstation_resource->common_public->action_free(simdata->compute))
634 simdata->compute = NULL;
636 MSG_RETURN(MSG_HOST_FAILURE);
638 if(surf_workstation_resource->common_public->action_free(simdata->compute))
639 simdata->compute = NULL;
641 MSG_RETURN(MSG_TASK_CANCELLED);
644 /** \ingroup m_task_management
645 * \brief Creates a new #m_task_t (a parallel one....).
647 * A constructor for #m_task_t taking six arguments and returning the
648 corresponding object.
649 * \param name a name for the object. It is for user-level information
651 * \param host_nb the number of hosts implied in the parallel task.
652 * \param host_list an array of \p host_nb m_host_t.
653 * \param computation_amount an array of \p host_nb
654 doubles. computation_amount[i] is the total number of operations
655 that have to be performed on host_list[i].
656 * \param communication_amount an array of \p host_nb* \p host_nb doubles.
657 * \param data a pointer to any data may want to attach to the new
658 object. It is for user-level information and can be NULL. It can
659 be retrieved with the function \ref MSG_task_get_data.
661 * \return The new corresponding object.
663 m_task_t MSG_parallel_task_create(const char *name,
665 const m_host_t *host_list,
666 double *computation_amount,
667 double *communication_amount,
670 simdata_task_t simdata = xbt_new0(s_simdata_task_t,1);
671 m_task_t task = xbt_new0(s_m_task_t,1);
675 task->name = xbt_strdup(name);
676 task->simdata = simdata;
680 simdata->sleeping = xbt_dynar_new(sizeof(m_process_t),NULL);
681 simdata->rate = -1.0;
683 simdata->sender = NULL;
684 simdata->source = NULL;
685 simdata->host_nb = host_nb;
687 simdata->host_list = xbt_new0(void *, host_nb);
688 simdata->comp_amount = computation_amount;
689 simdata->comm_amount = communication_amount;
691 for(i=0;i<host_nb;i++)
692 simdata->host_list[i] = host_list[i]->simdata->host;
698 static void __MSG_parallel_task_execute(m_process_t process, m_task_t task)
700 simdata_task_t simdata = NULL;
704 simdata = task->simdata;
706 xbt_assert0(simdata->host_nb,"This is not a parallel task. Go to hell.");
708 simdata->compute = surf_workstation_resource->extension_public->
709 execute_parallel_task(task->simdata->host_nb,
710 task->simdata->host_list,
711 task->simdata->comp_amount,
712 task->simdata->comm_amount,
716 surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
719 MSG_error_t MSG_parallel_task_execute(m_task_t task)
721 m_process_t process = MSG_process_self();
724 DEBUG0("Computing on a tons of guys");
726 __MSG_parallel_task_execute(process, task);
728 if(task->simdata->compute)
729 res = __MSG_wait_for_computation(process,task);
737 /** \ingroup msg_gos_functions
738 * \brief Sleep for the specified number of seconds
740 * Makes the current process sleep until \a time seconds have elapsed.
742 * \param nb_sec a number of second
744 MSG_error_t MSG_process_sleep(double nb_sec)
746 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
747 m_process_t process = MSG_process_self();
748 m_task_t dummy = NULL;
749 simdata_task_t simdata = NULL;
752 dummy = MSG_task_create("MSG_sleep", nb_sec, 0.0, NULL);
753 simdata = dummy->simdata;
755 simdata->compute = surf_workstation_resource->extension_public->
756 sleep(MSG_process_get_host(process)->simdata->host,
757 simdata->computation_amount);
758 surf_workstation_resource->common_public->action_set_data(simdata->compute,dummy);
763 __MSG_task_wait_event(process, dummy);
764 state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
765 } while (state==SURF_ACTION_RUNNING);
768 if(state == SURF_ACTION_DONE) {
769 if(surf_workstation_resource->extension_public->
770 get_state(MSG_process_get_host(process)->simdata->host)
772 if(surf_workstation_resource->common_public->action_free(simdata->compute))
773 simdata->compute = NULL;
774 MSG_RETURN(MSG_HOST_FAILURE);
776 if(__MSG_process_isBlocked(process)) {
777 __MSG_process_unblock(MSG_process_self());
779 if(surf_workstation_resource->extension_public->
780 get_state(MSG_process_get_host(process)->simdata->host)
782 if(surf_workstation_resource->common_public->action_free(simdata->compute))
783 simdata->compute = NULL;
784 MSG_RETURN(MSG_HOST_FAILURE);
786 if(surf_workstation_resource->common_public->action_free(simdata->compute))
787 simdata->compute = NULL;
788 MSG_task_destroy(dummy);
790 } else MSG_RETURN(MSG_HOST_FAILURE);
793 /** \ingroup msg_gos_functions
794 * \brief Return the number of MSG tasks currently running on
795 * the host of the current running process.
797 static int MSG_get_msgload(void)
803 xbt_assert0(0, "This function is still to be specified correctly (what do you mean by 'load', exactly?). In the meantime, please don't use it");
804 process = MSG_process_self();
805 return xbt_fifo_size(process->simdata->host->simdata->process_list);
808 /** \ingroup msg_gos_functions
810 * \brief Return the last value returned by a MSG function (except
813 MSG_error_t MSG_get_errno(void)
815 return PROCESS_GET_ERRNO();