+XBT_PUBLIC void execute(double flop);
+
+/** Block the actor, computing the given amount of flops at the given priority.
+ * An execution of priority 2 computes twice as fast as an execution at priority 1. */
+XBT_PUBLIC void execute(double flop, double priority);
+
+XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount);
+XBT_PUBLIC void parallel_execute(int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount,
+ double timeout);
+
+XBT_PUBLIC ExecPtr exec_init(double flops_amounts);
+XBT_PUBLIC ExecPtr exec_async(double flops_amounts);