- 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);
- else
- SIMIX_cond_wait(MSG_mailbox_get_cond(mailbox), 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);