+XBT_PUBLIC(void) SD_task_dump(SD_task_t task);
+XBT_PUBLIC(void) SD_task_dotty(SD_task_t task, void *out_FILE);
+
+XBT_PUBLIC(SD_task_t) SD_task_create_comp_seq(const char *name, void *data,
+ double amount);
+XBT_PUBLIC(SD_task_t) SD_task_create_comp_par_amdahl(const char *name,
+ void *data,
+ double amount,
+ double alpha);
+XBT_PUBLIC(SD_task_t) SD_task_create_comm_e2e(const char *name, void *data,
+ double amount);
+XBT_PUBLIC(SD_task_t) SD_task_create_comm_par_mxn_1d_block(const char *name,
+ void *data,
+ double amount);
+
+XBT_PUBLIC(void) SD_task_distribute_comp_amdahl(SD_task_t task, int ws_count);
+XBT_PUBLIC(void) SD_task_schedulev(SD_task_t task, int count,
+ const SD_workstation_t * list);
+XBT_PUBLIC(void) SD_task_schedulel(SD_task_t task, int count, ...);
+
+
+/** @brief A constant to use in SD_task_schedule to mean that there is no cost.
+ *
+ * For example, create a pure computation task (no comm) like this:
+ *
+ * SD_task_schedule(task, my_workstation_nb,
+ * my_workstation_list,
+ * my_computation_amount,
+ * SD_TASK_SCHED_NO_COST,
+ * my_rate);
+ */
+#define SD_SCHED_NO_COST NULL
+