/** @addtogroup m_process_management
* \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Processes" --> \endhtmlonly
*
- * We need to simulate many independent scheduling decisions, so
- * the concept of <em>process</em> is at the heart of the
- * simulator. A process may be defined as a <em>code</em>, with
- * some <em>private data</em>, executing in a <em>location</em>.
- * \see msg_process_t
+ * Processes (#msg_process_t) are independent agents that can do stuff on their own. They are in charge of executing your code interacting with the simulated world.
+ * A process may be defined as a <em>code</em> with some <em>private data</em>.
+ * Processes must be located on <em>hosts</em> (#msg_host_t), and they exchange data by sending tasks (#msg_task_t) that are similar to envelops containing data.
*/
/******************************** Process ************************************/
xbt_dict_t properties, int auto_restart,
smx_process_t parent_process)
{
- msg_host_t host = MSG_get_host_by_name(hostname);
+ msg_host_t host = MSG_host_by_name(hostname);
msg_process_t p = MSG_process_create_with_environment(name, code, data,
host, argc, argv,
properties);
simdata->data = data;
simdata->last_errno = MSG_OK;
- int future_simix_process_pid = SIMIX_process_get_maxpid();
- TRACE_msg_process_create(name, future_simix_process_pid, host);
-
/* Let's create the process: SIMIX may decide to start it right now,
* even before returning the flow control to us */
- simcall_process_create(&process, name, code, simdata, sg_host_name(host), -1,
+ simcall_process_create(&process, name, code, simdata, sg_host_name(host), -1,
argc, argv, properties,0);
- xbt_assert(future_simix_process_pid == SIMIX_process_get_PID(process));
+
+ TRACE_msg_process_create(name, SIMIX_process_get_PID(process), host);
if (!process) {
/* Undo everything we have just changed */
/* get from SIMIX the MSG process data, and then the user data */
simdata_process_t simdata = simcall_process_get_data(process);
- return simdata->data;
+ if (simdata)
+ return simdata->data;
+ else
+ return NULL;
}
/** \ingroup m_process_management