SD_workstation_t workstation = xbt_new0(s_SD_workstation_t, 1);
workstation->surf_workstation = surf_workstation;
workstation->data = data; /* user data */
+ SD_workstation_set_access_mode(workstation, SD_WORKSTATION_SHARED_ACCESS); /* default mode is shared */
+ workstation->task_fifo = NULL;
const char *name = SD_workstation_get_name(workstation);
xbt_dict_set(sd_global->workstations, name, workstation, __SD_workstation_destroy); /* add the workstation to the dictionary */
* \return an array of \ref SD_workstation_t containing all workstations
* \see SD_workstation_get_number()
*/
-const SD_workstation_t* SD_workstation_get_list(void) {
+const SD_workstation_t* SD_workstation_get_list(void) {
SD_CHECK_INIT_DONE();
xbt_assert0(SD_workstation_get_number() > 0, "There is no workstation!");
- SD_workstation_t *array = sd_global->workstation_list;
xbt_dict_cursor_t cursor;
char *key;
void *data;
int i;
- if (array == NULL) { /* this is the first time the function is called */
- array = xbt_new0(SD_workstation_t, sd_global->workstation_count);
+ if (sd_global->workstation_list == NULL) { /* this is the first time the function is called */
+ sd_global->workstation_list = xbt_new0(SD_workstation_t, sd_global->workstation_count);
i = 0;
xbt_dict_foreach(sd_global->workstations, cursor, key, data) {
- array[i++] = (SD_workstation_t) data;
+ sd_global->workstation_list[i++] = (SD_workstation_t) data;
}
}
- return array;
+ return sd_global->workstation_list;
}
/**
/**
* \brief Returns the route between two workstations
*
- * Use SD_route_get_size() to know the array size. Don't forget to free the array after use.
+ * Use SD_route_get_size() to know the array size.
*
* \param src a workstation
* \param dst another workstation
* \return a new array of \ref SD_link_t representating the route between these two workstations
* \see SD_route_get_size(), SD_link_t
*/
-SD_link_t* SD_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
+const SD_link_t* SD_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
SD_CHECK_INIT_DONE();
+ static int first_run = 1;
+
+ if (first_run) {
+ sd_global->recyclable_route = xbt_new0(SD_link_t, SD_link_get_number());
+ first_run = 0;
+ }
+
void *surf_src = src->surf_workstation;
void *surf_dst = dst->surf_workstation;
const void **surf_route = surf_workstation_resource->extension_public->get_route(surf_src, surf_dst);
int route_size = surf_workstation_resource->extension_public->get_route_size(surf_src, surf_dst);
- SD_link_t* route = xbt_new0(SD_link_t, route_size);
const char *link_name;
int i;
for (i = 0; i < route_size; i++) {
link_name = surf_workstation_resource->extension_public->get_link_name(surf_route[i]);
- route[i] = xbt_dict_get(sd_global->links, link_name);
+ sd_global->recyclable_route[i] = xbt_dict_get(sd_global->links, link_name);
}
- return route;
+ return sd_global->recyclable_route;
}
/**
double SD_route_get_current_latency(SD_workstation_t src, SD_workstation_t dst) {
SD_CHECK_INIT_DONE();
xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
- SD_link_t *links = SD_route_get_list(src, dst);
+ const SD_link_t *links = SD_route_get_list(src, dst);
int nb_links = SD_route_get_size(src, dst);
double latency = 0.0;
int i;
latency += SD_link_get_current_latency(links[i]);
}
- free(links);
return latency;
}
double SD_route_get_current_bandwidth(SD_workstation_t src, SD_workstation_t dst) {
SD_CHECK_INIT_DONE();
xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
- SD_link_t *links = SD_route_get_list(src, dst);
+ const SD_link_t *links = SD_route_get_list(src, dst);
int nb_links = SD_route_get_size(src, dst);
double bandwidth, min_bandwidth = -1.0;
int i;
min_bandwidth = bandwidth;
}
- free(links);
return min_bandwidth;
}
xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
xbt_assert0(communication_amount >= 0, "communication_amount must be greater than or equal to zero");
- SD_link_t *links;
+ const SD_link_t *links;
int nb_links;
double bandwidth, min_bandwidth;
double latency;
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) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(workstation != NULL, "Invalid parameter");
+ return workstation->access_mode;
+}
+
+/**
+ * \brief Sets the access mode for the tasks that will be executed on a workstation
+ *
+ * By default, a workstation resource 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) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(workstation != NULL, "Invalid parameter");
+
+ if (access_mode == workstation->access_mode) {
+ return; // nothing is changed
+ }
+
+ workstation->access_mode = access_mode;
+
+ if (access_mode == SD_WORKSTATION_SHARED_ACCESS) {
+ xbt_fifo_free(workstation->task_fifo);
+ workstation->task_fifo = NULL;
+ }
+ else {
+ workstation->task_fifo = xbt_fifo_new();
+ }
+}
+
+/* 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_assert0(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) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(workstation != NULL, "Invalid parameter");
+
+ return workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS &&
+ (workstation->current_task != NULL || xbt_fifo_size(workstation->task_fifo) > 0);
+}
+
/* Destroys a workstation.
*/
void __SD_workstation_destroy(void *workstation) {
SD_CHECK_INIT_DONE();
xbt_assert0(workstation != NULL, "Invalid parameter");
/* workstation->surf_workstation is freed by surf_exit and workstation->data is freed by the user */
- xbt_free(workstation);
+
+ SD_workstation_t w = (SD_workstation_t) workstation;
+
+ if (w->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ xbt_fifo_free(w->task_fifo);
+ }
+ xbt_free(w);
}
