+(define-alien-routine ("protect_control_stack_guard_page"
+ %protect-control-stack-guard-page)
+ sb!alien:int (thread-id sb!alien:int) (protect-p sb!alien:int))
+(defun protect-control-stack-guard-page (n)
+ (%protect-control-stack-guard-page
+ (sb!thread:current-thread-id) (if n 1 0)))
+