+#ifndef RB_SD_WORKSTATION_H
+#define RB_SD_WORKSTATION_H
+
+#include <ruby.h>
+#include <simdag/simdag.h>
+
+// free
+static void SD_workstation_free(SD_workstation_t);
+
+// Workstation List
+static VALUE rb_SD_workstation_list(VALUE Class);
+
+// Workstation number
+static VALUE rb_SD_workstation_number(VALUE Class);
+
+// Workstation name
+static VALUE rb_SD_workstation_name(VALUE Class,VALUE workstation);
+
+#endif
\ No newline at end of file