MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task);
MSG_error_t __MSG_task_wait_event(m_process_t process, m_task_t task);
-int __MSG_process_block(double max_duration);
+int __MSG_process_block(double max_duration, const char *info);
MSG_error_t __MSG_process_unblock(m_process_t process);
int __MSG_process_isBlocked(m_process_t process);