From e7907f648f3c576615c5ead2d9fc4fa156b6a97c Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sun, 1 Dec 2013 21:29:21 -0500
Subject: Use dynamic-wind in with-window form.

* 2d/window.scm (with-window): Use dynamic-wind.
---
 2d/window.scm | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to '2d/window.scm')

diff --git a/2d/window.scm b/2d/window.scm
index 4c967de..f5f16b8 100644
--- a/2d/window.scm
+++ b/2d/window.scm
@@ -81,7 +81,7 @@
   (SDL:quit))
 
 (define-syntax-rule (with-window window body ...)
-  (begin
-    (open-window window)
-    body ...
-    (close-window)))
+  (dynamic-wind
+    (lambda () (open-window window))
+    (lambda () body ...)
+    (lambda () (close-window))))
-- 
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