From: Chris Hanson <org/chris-hanson/cph>
Date: Fri, 17 May 1996 17:47:59 +0000 (+0000)
Subject: Implement new procedure, like WITHOUT-INTERRUPTS, except that it
X-Git-Tag: 20090517-FFI~5504
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=46fd7819f6c75036a2aa60cb9f30fa86f8ed3426;p=mit-scheme.git

Implement new procedure, like WITHOUT-INTERRUPTS, except that it
allows keyboard interrupts.
---

diff --git a/v7/src/runtime/boot.scm b/v7/src/runtime/boot.scm
index d7d825568..97e288737 100644
--- a/v7/src/runtime/boot.scm
+++ b/v7/src/runtime/boot.scm
@@ -1,8 +1,8 @@
 #| -*-Scheme-*-
 
-$Id: boot.scm,v 14.10 1993/10/21 13:57:29 cph Exp $
+$Id: boot.scm,v 14.11 1996/05/17 17:47:59 cph Exp $
 
-Copyright (c) 1988-93 Massachusetts Institute of Technology
+Copyright (c) 1988-96 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -95,6 +95,9 @@ MIT in each case. |#
 ;; GC & stack overflow only
 (define-integrable interrupt-mask/gc-ok    #x0007)
 
+;; GC, stack overflow, and keyboard only
+(define-integrable interrupt-mask/no-background #x0017)
+
 ;; GC, stack overflow, and timer only
 (define-integrable interrupt-mask/timer-ok #x0047)
 
@@ -116,6 +119,12 @@ MIT in each case. |#
       interrupt-mask
       (thunk))))
 
+(define (without-background-interrupts thunk)
+  (with-interrupt-mask interrupt-mask/no-background
+    (lambda (interrupt-mask)
+      interrupt-mask
+      (thunk))))
+
 (define-primitives
   (object-pure? pure?)
   (object-constant? constant?)