Mon, 30 Jul 2007 19:22:27 +0200 wenzelm dequeue: wait loop while PROTECTED -- avoids race condition;
Mon, 30 Jul 2007 11:12:28 +0200 wenzelm marked some CRITICAL sections;
Mon, 30 Jul 2007 10:39:12 +0200 urbanc updated some of the definitions and proofs
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