- m_process_t process = MSG_process_self();
- m_task_t t = NULL;
- m_host_t h = NULL;
- simdata_task_t t_simdata = NULL;
- simdata_host_t h_simdata = NULL;
- int first_time = 1;
-
- smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet
-
- CHECK_HOST();
-
- /* Sanity check */
- xbt_assert0(task, "Null pointer for the task storage");
-
- if (*task)
- CRITICAL0("MSG_task_get() was asked to write in a non empty task struct.");
-
- /* Get the task */
- h = MSG_host_self();
- h_simdata = h->simdata;
-
- SIMIX_mutex_lock(h->simdata->mutex);
-
- while (1)
- {
- /* if the mailbox is empty (has no task */
- if(!MSG_mailbox_is_empty(mailbox))
- {
- if(!host)
- {
- /* pop the head of the mailbox */
- t = MSG_mailbox_pop_head(mailbox);
- break;
- }
- else
- {
- /* get the first task of the host */
- if(NULL != (t = MSG_mailbox_get_first_host_task(mailbox,host)))
- break;
- }
- }
-
- if(timeout > 0)
- {
- if (!first_time)
- {
- SIMIX_mutex_unlock(h->simdata->mutex);
- /* set the simix condition of the mailbox to NULL */
- MSG_mailbox_set_cond(mailbox, NULL);
- SIMIX_cond_destroy(cond);
- MSG_RETURN(MSG_TRANSFER_FAILURE);
- }
- }
-
- xbt_assert1(!MSG_mailbox_get_cond(mailbox),"A process is already blocked on the channel %s", MSG_mailbox_get_alias(mailbox));
-
- cond = SIMIX_cond_init();
-
- /* set the condition of the mailbox */
- MSG_mailbox_set_cond(mailbox, cond);
-
- if (timeout > 0)
- SIMIX_cond_wait_timeout(cond, h->simdata->mutex, timeout);
- else
- SIMIX_cond_wait(MSG_mailbox_get_cond(mailbox), h->simdata->mutex);
-
-
- if (SIMIX_host_get_state(h_simdata->smx_host) == 0)
- MSG_RETURN(MSG_HOST_FAILURE);
-
- first_time = 0;
- }
-
- SIMIX_mutex_unlock(h->simdata->mutex);
-
- DEBUG1("OK, got a task (%s)", t->name);
- /* clean conditional */
- if (cond)
- {
- SIMIX_cond_destroy(cond);
-
- MSG_mailbox_set_cond(mailbox,NULL);
- }
-
- t_simdata = t->simdata;
- t_simdata->receiver = process;
- *task = t;
-
- SIMIX_mutex_lock(t_simdata->mutex);
-
- /* Transfer */
- /* create SIMIX action to the communication */
- t_simdata->comm = SIMIX_action_communicate(
- t_simdata->sender->simdata->m_host->simdata->smx_host,
- process->simdata->m_host->simdata->smx_host,
- t->name,
- t_simdata->message_size,
- t_simdata->rate
- );
-
- /* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */
- if (MSG_process_is_suspended(t_simdata->sender))
- {
- DEBUG1("Process sender (%s) suspended", t_simdata->sender->name);
- SIMIX_action_set_priority(t_simdata->comm, 0);
- }
-
- process->simdata->waiting_task = t;
- SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond);
-
- while (1)
- {
- SIMIX_cond_wait(t_simdata->cond, t_simdata->mutex);
-
- if (SIMIX_action_get_state(t_simdata->comm) != SURF_ACTION_RUNNING)
- break;
- }
-
- SIMIX_unregister_action_to_condition(t_simdata->comm, t_simdata->cond);
- process->simdata->waiting_task = NULL;
-
- /* the task has already finished and the pointer must be null */
- if (t->simdata->sender)
- {
- t->simdata->sender->simdata->waiting_task = NULL;
- }
-
- /* for this process, don't need to change in get function */
- t->simdata->receiver = NULL;
- SIMIX_mutex_unlock(t_simdata->mutex);
-
-
- if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE)
- {
- SIMIX_action_destroy(t_simdata->comm);
- t_simdata->comm = NULL;
- t_simdata->using--;
- MSG_RETURN(MSG_OK);
- }
- else if (SIMIX_host_get_state(h_simdata->smx_host) == 0)
- {
- SIMIX_action_destroy(t_simdata->comm);
- t_simdata->comm = NULL;
- t_simdata->using--;
- MSG_RETURN(MSG_HOST_FAILURE);
- }
- else
- {
- SIMIX_action_destroy(t_simdata->comm);
- t_simdata->comm = NULL;
- t_simdata->using--;
- MSG_RETURN(MSG_TRANSFER_FAILURE);
- }
+ m_process_t process = MSG_process_self();
+ m_task_t t = NULL;
+ m_host_t h = NULL;
+ simdata_task_t t_simdata = NULL;
+ simdata_host_t h_simdata = NULL;
+ double start_time = SIMIX_get_clock();
+
+ smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet
+
+ CHECK_HOST();
+
+ /* Sanity check */
+ xbt_assert0(task, "Null pointer for the task storage");
+
+ if (*task)
+ CRITICAL0
+ ("MSG_task_get() was asked to write in a non empty task struct.");
+
+ /* Get the task */
+ h = MSG_host_self();
+ h_simdata = h->simdata;
+
+ SIMIX_mutex_lock(h_simdata->mutex); //FIXME: lock the mailbox instead
+
+ if (MSG_mailbox_get_cond(mailbox)) {
+ CRITICAL1
+ ("A process is already blocked on the channel %s (meaning that someone is already doing a get on this)",
+ MSG_mailbox_get_alias(mailbox));
+ SIMIX_cond_display_info(MSG_mailbox_get_cond(mailbox));
+ xbt_die("Go fix your code!");
+ }
+
+ while (1) {
+ /* if the mailbox is not empty (has a task) */
+ if (!MSG_mailbox_is_empty(mailbox)) {
+ if (!host) {
+ /* pop the head of the mailbox */
+ t = MSG_mailbox_pop_head(mailbox);
+ break;
+ } else {
+ /* get the first task of the host */
+ if ((t = MSG_mailbox_get_first_host_task(mailbox, host)))
+ break;
+ }
+ }
+
+ if ((timeout > 0) && (SIMIX_get_clock() - start_time >= timeout)) { // Timeout already elapsed
+ SIMIX_mutex_unlock(h_simdata->mutex);
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+
+ if (!cond) {
+ cond = SIMIX_cond_init();
+ MSG_mailbox_set_cond(mailbox, cond);
+ }
+
+ if (timeout > 0)
+ SIMIX_cond_wait_timeout(cond, h_simdata->mutex,
+ timeout - start_time + SIMIX_get_clock());
+ else
+ SIMIX_cond_wait(cond, h_simdata->mutex);
+
+ if (SIMIX_host_get_state(h_simdata->smx_host) == 0) {
+ SIMIX_mutex_unlock(h_simdata->mutex);
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+ }
+
+
+ DEBUG1("OK, got a task (%s)", t->name);
+ /* clean conditional */
+ if (cond) {
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ }
+
+ SIMIX_mutex_unlock(h_simdata->mutex);
+
+ t_simdata = t->simdata;
+ t_simdata->receiver = process;
+ *task = t;
+
+ SIMIX_mutex_lock(t_simdata->mutex);
+
+ /* Transfer */
+ /* create SIMIX action to the communication */
+ t_simdata->comm =
+ SIMIX_action_communicate(t_simdata->sender->simdata->m_host->
+ simdata->smx_host,
+ process->simdata->m_host->simdata->smx_host,
+ t->name, t_simdata->message_size,
+ t_simdata->rate);
+
+ SIMIX_action_use(t_simdata->comm);
+
+ /* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */
+ if (MSG_process_is_suspended(t_simdata->sender)) {
+ DEBUG1("Process sender (%s) suspended", t_simdata->sender->name);
+ SIMIX_action_set_priority(t_simdata->comm, 0);
+ }
+ SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond);
+ // breaking point if asynchrounous
+ process->simdata->waiting_action = t_simdata->comm;
+
+ while (1) {
+ SIMIX_cond_wait(t_simdata->cond, t_simdata->mutex);
+
+ if (SIMIX_action_get_state(t_simdata->comm) != SURF_ACTION_RUNNING)
+ break;
+ if (!SIMIX_host_get_state(h_simdata->smx_host))
+ break;
+ if (!SIMIX_host_get_state(process->simdata->m_host->simdata->smx_host))
+ break;
+ }
+
+ SIMIX_unregister_action_to_condition(t_simdata->comm, t_simdata->cond);
+ process->simdata->waiting_action = NULL;
+
+ /* for this process, don't need to change in get function */
+ SIMIX_mutex_unlock(t_simdata->mutex);
+
+ if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) {
+ if (SIMIX_action_destroy(t_simdata->comm))
+ t_simdata->comm = NULL;
+ MSG_RETURN(MSG_OK);
+ } else if (SIMIX_host_get_state(h_simdata->smx_host) == 0) {
+ if (SIMIX_action_destroy(t_simdata->comm))
+ t_simdata->comm = NULL;
+ MSG_RETURN(MSG_HOST_FAILURE);
+ } else {
+ if (SIMIX_action_destroy(t_simdata->comm))
+ t_simdata->comm = NULL;
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }