+#endif /* defined GENCGC */
+\f
+/* threads */
+
+/* no threading in any *BSD variant on any CPU (yet? in sbcl-0.8.0 anyway) */
+#ifdef LISP_FEATURE_SB_THREAD
+#error "Define threading support functions"
+#else
+struct thread *arch_os_get_current_thread() {
+ return all_threads;
+}
+int arch_os_thread_init(struct thread *thread) {
+ stack_t sigstack;
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+ /* Signal handlers are run on the control stack, so if it is exhausted
+ * we had better use an alternate stack for whatever signal tells us
+ * we've exhausted it */
+ sigstack.ss_sp=((void *) thread)+dynamic_values_bytes;
+ sigstack.ss_flags=0;
+ sigstack.ss_size = 32*SIGSTKSZ;
+ sigaltstack(&sigstack,0);
+#endif
+ return 1; /* success */
+}
+int arch_os_thread_cleanup(struct thread *thread) {
+ return 1; /* success */
+}
+#endif