+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
+ "Logging specific to MSG (gos)");
+
+/** \ingroup msg_gos_functions
+ *
+ * \brief Return the last value returned by a MSG function (except
+ * MSG_get_errno...).
+ */
+MSG_error_t MSG_get_errno(void)
+{
+ return PROCESS_GET_ERRNO();
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Executes a task and waits for its termination.
+ *
+ * This function is used for describing the behavior of an agent. It
+ * takes only one parameter.
+ * \param task a #m_task_t to execute on the location on which the
+ agent is running.
+ * \return #MSG_FATAL if \a task is not properly initialized and
+ * #MSG_OK otherwise.
+ */
+MSG_error_t MSG_task_execute(m_task_t task)
+{
+ simdata_task_t simdata = NULL;
+ m_process_t self = MSG_process_self();
+ e_smx_state_t comp_state;
+ CHECK_HOST();
+
+ simdata = task->simdata;
+
+ xbt_assert0(simdata->host_nb == 0,
+ "This is a parallel task. Go to hell.");
+
+#ifdef HAVE_TRACING
+ TRACE_msg_task_execute_start(task);
+#endif
+
+ xbt_assert1((!simdata->compute) && (task->simdata->isused == 0),
+ "This task is executed somewhere else. Go fix your code! %d",
+ task->simdata->isused);
+
+ DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
+
+ if (simdata->computation_amount == 0) {
+#ifdef HAVE_TRACING
+ TRACE_msg_task_execute_end(task);
+#endif
+ return MSG_OK;
+ }
+ simdata->isused=1;
+ simdata->compute =
+ SIMIX_req_host_execute(task->name, SIMIX_host_self(),
+ simdata->computation_amount,
+ simdata->priority);
+#ifdef HAVE_TRACING
+ SIMIX_req_set_category(simdata->compute, task->category);
+#endif
+
+ self->simdata->waiting_action = simdata->compute;
+ comp_state = SIMIX_req_host_execution_wait(simdata->compute);
+ self->simdata->waiting_action = NULL;
+
+ simdata->isused=0;
+
+ DEBUG2("Execution task '%s' finished in state %d", task->name, comp_state);
+ if (comp_state == SIMIX_DONE) {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ simdata->computation_amount = 0.0;
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+#ifdef HAVE_TRACING
+ TRACE_msg_task_execute_end(task);
+#endif
+ MSG_RETURN(MSG_OK);
+ } else if (SIMIX_req_host_get_state(SIMIX_host_self()) == 0) {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+#ifdef HAVE_TRACING
+ TRACE_msg_task_execute_end(task);
+#endif
+ MSG_RETURN(MSG_HOST_FAILURE);
+ } else {
+ /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
+ simdata->comm = NULL;
+ simdata->compute = NULL;
+#ifdef HAVE_TRACING
+ TRACE_msg_task_execute_end(task);
+#endif
+ MSG_RETURN(MSG_TASK_CANCELLED);
+ }
+}
+
+/** \ingroup m_task_management
+ * \brief Creates a new #m_task_t (a parallel one....).
+ *
+ * A constructor for #m_task_t taking six arguments and returning the
+ corresponding object.
+ * \param name a name for the object. It is for user-level information
+ and can be NULL.
+ * \param host_nb the number of hosts implied in the parallel task.
+ * \param host_list an array of \p host_nb m_host_t.
+ * \param computation_amount an array of \p host_nb
+ doubles. computation_amount[i] is the total number of operations
+ that have to be performed on host_list[i].
+ * \param communication_amount an array of \p host_nb* \p host_nb doubles.
+ * \param data a pointer to any data may want to attach to the new
+ object. It is for user-level information and can be NULL. It can
+ be retrieved with the function \ref MSG_task_get_data.
+ * \see m_task_t
+ * \return The new corresponding object.