From: Ramakrishnan Muthukrishnan <vu3rdd@gmail.com>
Date: Fri, 17 Jun 2011 14:51:48 +0000 (+0530)
Subject: solution to 3.45
X-Git-Url: https://git.rkrishnan.org/%5B/frontends/%22news.html/rgr-080307.php?a=commitdiff_plain;h=5affa0019a9c876b3c8121e24ae738fe68f96518;p=sicp.git

solution to 3.45
---

diff --git a/src/sicp/ex3_45.rkt b/src/sicp/ex3_45.rkt
new file mode 100644
index 0000000..f3dd618
--- /dev/null
+++ b/src/sicp/ex3_45.rkt
@@ -0,0 +1,14 @@
+#lang racket
+
+#|
+
+Deposits and Withdrawals are fine. But when it comes to exchange, we need a
+"mutually serialized" procedure with something like this:
+
+ (serializer-1 (serializer-2 exchange))
+
+Otherwise, we are creating a "time hole" when another execution process can
+get hold of one of the account and deposit/withdraw from it which will make
+the end result of exchange erroneous.
+
+|#
\ No newline at end of file