mxqd_config: Add server_sort_groups_by_priority

Add a utility routing to sort the groups of all users of the server to
their group priority.

mxqd_control.c

@@ -537,3 +537,24 @@ void server_sort_users_by_running_global_slot_count(struct mxq_server *server)
     assert(server);
     mx_sort_linked_list(&server->users,cmp_users_by_global_running_slots,get_users_nextptr);
 }
+
+static int cmp_groups_by_priority(struct mxq_group_list *g1,struct mxq_group_list *g2)
+{
+    return
+        g1->group.group_priority > g2->group.group_priority ? 1
+          : g1->group.group_priority < g2->group.group_priority ? -1
+          : 0;
+}
+
+static struct mxq_group_list **get_groups_nextptr(struct mxq_group_list *g) {
+    return &g->next;
+}
+
+void server_sort_groups_by_priority(struct mxq_server *server) {
+    assert(server);
+    struct mxq_user_list *user;
+
+    for (user=server->users;user;user=user->next) {
+        mx_sort_linked_list(&user->groups,cmp_groups_by_priority,get_groups_nextptr);
+    }
+}

mxqd_control.h

@@ -20,7 +20,7 @@ struct mxq_job_list *group_list_add_job(struct mxq_group_list *glist, struct mxq
 int server_remove_orphaned_groups(struct mxq_server *server);
 
 void job_list_remove_self(struct mxq_job_list *jlist);
-
+void server_sort_groups_by_priority(struct mxq_server *server);
 
 
 #endif