+ simdata_task_t simdata = NULL;
+ m_process_t self = MSG_process_self();
+ e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
+ CHECK_HOST();
+
+ simdata = task->simdata;
+
+ xbt_assert0((!simdata->compute)
+ && (task->simdata->refcount == 1),
+ "This task is executed somewhere else. Go fix your code!");
+
+ xbt_assert0(simdata->host_nb, "This is not a parallel task. Go to hell.");
+
+ DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
+
+ simdata->refcount++;
+
+ SIMIX_mutex_lock(simdata->mutex);
+ simdata->compute =
+ SIMIX_action_parallel_execute(task->name, simdata->host_nb,
+ simdata->host_list, simdata->comp_amount,
+ simdata->comm_amount, 1.0, -1.0);
+
+ self->simdata->waiting_action = simdata->compute;
+ SIMIX_register_action_to_condition(simdata->compute, simdata->cond);
+ do {
+ SIMIX_cond_wait(simdata->cond, simdata->mutex);
+ state = SIMIX_action_get_state(task->simdata->compute);
+ } while (state == SURF_ACTION_READY || state == SURF_ACTION_RUNNING);
+
+ SIMIX_unregister_action_to_condition(simdata->compute, simdata->cond);
+ self->simdata->waiting_action = NULL;
+
+
+ SIMIX_mutex_unlock(simdata->mutex);
+ simdata->refcount--;
+
+ if (SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_DONE) {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ SIMIX_action_destroy(task->simdata->compute);
+ simdata->computation_amount = 0.0;
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+ MSG_RETURN(MSG_OK);
+ } else if (SIMIX_host_get_state(SIMIX_host_self()) == 0) {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ SIMIX_action_destroy(task->simdata->compute);
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+ MSG_RETURN(MSG_HOST_FAILURE);
+ } else {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ SIMIX_action_destroy(task->simdata->compute);
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+ MSG_RETURN(MSG_TASK_CANCELLED);
+ }
+
+}
+
+
+/** \ingroup msg_gos_functions
+ * \brief Sleep for the specified number of seconds
+ *
+ * Makes the current process sleep until \a time seconds have elapsed.
+ *
+ * \param nb_sec a number of second
+ */
+MSG_error_t MSG_process_sleep(double nb_sec)
+{
+ smx_action_t act_sleep;
+ m_process_t proc = MSG_process_self();
+ e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
+ smx_mutex_t mutex;
+ smx_cond_t cond;
+
+#ifdef HAVE_TRACING
+ TRACE_msg_process_sleep_in (MSG_process_self());
+#endif
+
+ /* create action to sleep */
+ act_sleep =
+ SIMIX_action_sleep(SIMIX_process_get_host(proc->simdata->s_process),
+ nb_sec);
+
+ mutex = SIMIX_mutex_init();
+ SIMIX_mutex_lock(mutex);
+
+ /* create conditional and register action to it */
+ cond = SIMIX_cond_init();
+
+ proc->simdata->waiting_action = act_sleep;
+ SIMIX_register_action_to_condition(act_sleep, cond);
+ do {
+ SIMIX_cond_wait(cond, mutex);
+ state = SIMIX_action_get_state(act_sleep);
+ } while (state == SURF_ACTION_READY || state == SURF_ACTION_RUNNING);
+ proc->simdata->waiting_action = NULL;
+ SIMIX_unregister_action_to_condition(act_sleep, cond);
+ SIMIX_mutex_unlock(mutex);
+
+ /* remove variables */
+ SIMIX_cond_destroy(cond);
+ SIMIX_mutex_destroy(mutex);
+
+ if (SIMIX_action_get_state(act_sleep) == SURF_ACTION_DONE) {
+ if (SIMIX_host_get_state(SIMIX_host_self()) == SURF_RESOURCE_OFF) {
+ SIMIX_action_destroy(act_sleep);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_sleep_out (MSG_process_self());
+#endif
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+ } else {
+ SIMIX_action_destroy(act_sleep);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_sleep_out (MSG_process_self());
+#endif
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+
+ SIMIX_action_destroy(act_sleep);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_sleep_out (MSG_process_self());
+#endif
+ MSG_RETURN(MSG_OK);
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Listen on \a channel and waits for receiving a task from \a host.
+ *
+ * It takes three parameters.
+ * \param task a memory location for storing a #m_task_t. It will
+ hold a task when this function will return. Thus \a task should not
+ be equal to \c NULL and \a *task should be equal to \c NULL. If one of
+ those two condition does not hold, there will be a warning message.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \param host the host that is to be watched.
+ * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
+ if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
+ */
+MSG_error_t
+MSG_task_get_from_host(m_task_t * task, m_channel_t channel, m_host_t host)
+{
+ return MSG_task_get_ext(task, channel, -1, host);