+ return min_bandwidth;
+}
+
+/**
+ * \brief Returns an approximative estimated time for the given
+ * communication amount between two workstations
+ *
+ * \param src the first workstation
+ * \param dst the second workstation
+ * \param communication_amount the communication amount you want to evaluate (in bytes)
+ * \return an approximative estimated computation time for the given communication amount
+ * between the workstations (in seconds)
+ */
+double SD_route_get_communication_time(SD_workstation_t src,
+ SD_workstation_t dst,
+ double communication_amount)
+{
+
+
+ /* total time = latency + transmission time of the slowest link
+ transmission time of a link = communication amount / link bandwidth */
+
+ const SD_link_t *links;
+ int nb_links;
+ double bandwidth, min_bandwidth;
+ double latency;
+ int i;
+
+ xbt_assert(communication_amount >= 0,
+ "communication_amount must be greater than or equal to zero");
+
+
+
+ if (communication_amount == 0.0)
+ return 0.0;
+
+ links = SD_route_get_list(src, dst);
+ nb_links = SD_route_get_size(src, dst);
+ min_bandwidth = -1.0;
+ latency = 0;
+
+ for (i = 0; i < nb_links; i++) {
+ latency += SD_link_get_current_latency(links[i]);
+ bandwidth = SD_link_get_current_bandwidth(links[i]);
+ if (bandwidth < min_bandwidth || min_bandwidth == -1.0)
+ min_bandwidth = bandwidth;
+ }
+
+ return latency + (communication_amount / min_bandwidth);
+}
+
+/**
+ * \brief Returns the access mode of this workstation.
+ *
+ * \param workstation a workstation
+ * \return the access mode for the tasks running on this workstation:
+ * SD_WORKSTATION_SHARED_ACCESS or SD_WORKSTATION_SEQUENTIAL_ACCESS
+ *
+ * \see SD_workstation_set_access_mode(), e_SD_workstation_access_mode_t
+ */
+e_SD_workstation_access_mode_t
+SD_workstation_get_access_mode(SD_workstation_t workstation)
+{
+ return SD_workstation_priv(workstation)->access_mode;
+}
+
+/**
+ * \brief Sets the access mode for the tasks that will be executed on a workstation
+ *
+ * By default, a workstation model is shared, i.e. several tasks
+ * can be executed at the same time on a workstation. The CPU power of
+ * the workstation is shared between the running tasks on the workstation.
+ * In sequential mode, only one task can use the workstation, and the other
+ * tasks wait in a FIFO.
+ *
+ * \param workstation a workstation
+ * \param access_mode the access mode you want to set to this workstation:
+ * SD_WORKSTATION_SHARED_ACCESS or SD_WORKSTATION_SEQUENTIAL_ACCESS
+ *
+ * \see SD_workstation_get_access_mode(), e_SD_workstation_access_mode_t
+ */
+void SD_workstation_set_access_mode(SD_workstation_t workstation,
+ e_SD_workstation_access_mode_t
+ access_mode)
+{
+ xbt_assert(access_mode != SD_WORKSTATION_SEQUENTIAL_ACCESS ||
+ access_mode != SD_WORKSTATION_SHARED_ACCESS,
+ "Trying to set an invalid access mode");
+
+ if (access_mode == SD_workstation_priv(workstation)->access_mode) {
+ return; // nothing is changed
+ }
+
+ SD_workstation_priv(workstation)->access_mode = access_mode;
+
+ if (access_mode == SD_WORKSTATION_SHARED_ACCESS) {
+ xbt_fifo_free(SD_workstation_priv(workstation)->task_fifo);
+ SD_workstation_priv(workstation)->task_fifo = NULL;
+ } else {
+ SD_workstation_priv(workstation)->task_fifo = xbt_fifo_new();
+ }
+}
+
+/**
+ * \brief Return the list of mounted storages on a workstation.
+ *
+ * \param workstation a workstation
+ * \return a dynar containing all mounted storages on the workstation
+ */
+xbt_dict_t SD_workstation_get_storage_list(SD_workstation_t workstation){
+ return surf_workstation_model->extension.workstation.get_storage_list(workstation);
+}
+
+/* Returns whether a task can start now on a workstation*/
+/*
+ int __SD_workstation_can_start(SD_workstation_t workstation, SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert(workstation != NULL && task != NULL, "Invalid parameter");
+
+ return !__SD_workstation_is_busy(workstation) &&
+ (xbt_fifo_size(workstation->task_fifo) == 0) || xbt_fifo_get_first_item(workstation->task_fifo) == task);
+ }
+*/
+
+/* Returns whether a workstation is busy. A workstation is busy is it is
+ * in sequential mode and a task is running on it or the fifo is not empty.
+ */
+int __SD_workstation_is_busy(SD_workstation_t workstation)
+{
+ XBT_DEBUG
+ ("Workstation '%s' access mode: '%s', current task: %s, fifo size: %d",
+ SD_workstation_get_name(workstation),
+ (SD_workstation_priv(workstation)->access_mode ==
+ SD_WORKSTATION_SHARED_ACCESS) ? "SHARED" : "FIFO",
+ (SD_workstation_priv(workstation)->current_task ?
+ SD_task_get_name(SD_workstation_priv(workstation)->current_task)
+ : "none"),
+ (SD_workstation_priv(workstation)->task_fifo ? xbt_fifo_size(SD_workstation_priv(workstation)->task_fifo) :
+ 0));
+
+ return SD_workstation_priv(workstation)->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS &&
+ (SD_workstation_priv(workstation)->current_task != NULL
+ || xbt_fifo_size(SD_workstation_priv(workstation)->task_fifo) > 0);
+}
+
+/* Destroys a workstation.
+ */
+void __SD_workstation_destroy(void *workstation)
+{
+
+ SD_workstation_priv_t w;
+
+ /* workstation->surf_workstation is freed by surf_exit and workstation->data is freed by the user */
+
+ w = (SD_workstation_priv_t) workstation;
+
+ if (w->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ xbt_fifo_free(w->task_fifo);
+ }
+ xbt_free(w);
+}
+
+/**
+ * \brief Returns the kind of the task currently running on a workstation
+ * Only call this with sequential access mode set
+ * \param workstation a workstation */
+SD_task_t SD_workstation_get_current_task(SD_workstation_t workstation)
+{
+ xbt_assert(SD_workstation_priv(workstation)->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS,
+ "Access mode must be set to SD_WORKSTATION_SEQUENTIAL_ACCESS"
+ " to use this function");
+
+ return (SD_workstation_priv(workstation)->current_task);
+}
+
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to the AS
+ * or router
+ *
+ * \param AS, router name
+ * \return the xbt_dict_t properties of the AS
+ */
+xbt_dict_t SD_as_router_get_properties(const char *asr)
+{
+ return get_as_router_properties(asr);
+}
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to the AS
+ * or router
+ *
+ * \param AS, router name
+ * \param The name of a properties
+ * \return value of the properties
+ */
+const char* SD_as_router_get_property_value(const char *asr, const char *name)
+{
+ xbt_dict_t dict = get_as_router_properties(asr);
+ if(!dict) return NULL;
+ return xbt_dict_get_or_null(dict,name);