-XBT_PRIVATE xbt_dict_t SIMIX_host_get_properties(sg_host_t host);
-XBT_PRIVATE xbt_swag_t SIMIX_host_get_process_list(sg_host_t host);
-XBT_PRIVATE double SIMIX_host_get_current_power_peak(sg_host_t host);
-XBT_PRIVATE double SIMIX_host_get_power_peak_at(sg_host_t host, int pstate_index);
-XBT_PRIVATE double SIMIX_host_get_wattmin_at(sg_host_t host,int pstate);
-XBT_PRIVATE double SIMIX_host_get_wattmax_at(sg_host_t host,int pstate);
-XBT_PRIVATE void SIMIX_host_set_pstate(sg_host_t host, int pstate_index);
-XBT_PRIVATE smx_synchro_t SIMIX_process_execute(smx_process_t issuer, const char *name,
- double flops_amount, double priority, double bound, unsigned long affinity_mask);
-XBT_PRIVATE smx_synchro_t SIMIX_process_parallel_execute(const char *name,
+XBT_PRIVATE smx_activity_t SIMIX_execution_start(smx_actor_t issuer, const char *name,
+ double flops_amount, double priority, double bound);
+XBT_PRIVATE smx_activity_t SIMIX_execution_parallel_start(const char *name,