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Update of /cvsroot/sbcl/sbcl/contrib/sb-concurrency
In directory sfp-cvsdas-3.v30.ch3.sourceforge.com:/tmp/cvs-serv26755/contrib/sb-concurrency
188.8.131.52: threads: Insert barriers as appear to be required.
* This is mainly for mutexes, spinlocks, and sb-concurrency
* These are probably-necessary and appear to be sufficient.
RCS file: /cvsroot/sbcl/sbcl/contrib/sb-concurrency/queue.lisp,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- queue.lisp 30 Mar 2010 10:46:44 -0000 1.1
+++ queue.lisp 4 Aug 2010 18:03:35 -0000 1.2
@@ -66,6 +66,7 @@
(tail (queue-tail queue))
(first-node-prev (node-prev head))
(val (node-value head)))
+ (barrier (:read))
(when (eq head (queue-head queue))
(cond ((not (eq val +dummy+))
(if (eq tail head)
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