From 37da2899f40661e3e9631e497da8dc59b971cbd0 Mon Sep 17 00:00:00 2001
From: "Charles.Forsyth" <devnull@localhost>
Date: Fri, 22 Dec 2006 17:07:39 +0000
Subject: 20060303a

---
 appl/lib/lock.b | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 appl/lib/lock.b

(limited to 'appl/lib/lock.b')

diff --git a/appl/lib/lock.b b/appl/lib/lock.b
new file mode 100644
index 00000000..8b51e4f9
--- /dev/null
+++ b/appl/lib/lock.b
@@ -0,0 +1,26 @@
+implement Lock;
+
+include "sys.m";
+	sys:	Sys;
+include "lock.m";
+
+Semaphore.obtain(l: self ref Semaphore)
+{
+	l.c <-= 0;
+}
+
+Semaphore.release(l: self ref Semaphore)
+{
+	<-l.c;
+}
+
+Semaphore.new(): ref Semaphore
+{
+	l := ref Semaphore;
+	l.c = chan[1] of int;
+	return l;
+}
+
+init()
+{
+}
-- 
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