DCAS-based Concurrent Deques SupportingBulk Allocation

We present a lock-free implementation of a dynamically sized double-ended queue (deque) that is based on the double compare-and-swap (DCAS) instruction. This implementation improves over the best previous one by allowing storage to be allocated and freed in bulk when the size of the deque changes significantly, and to avoid invocation of the storage allocator at all while the size remains relatively stable. We achieved this implementation in two steps by first solving the easier problem of implementing the deque for a garbage-collected environment, and then applying the Lock-Free Reference Counting methodology we recently proposed in order to achieve a version independent of garbage collection. email addresses: [email protected] [email protected] [email protected] © 2002 Sun Microsystems, Inc. All rights reserved. The SML Technical Report Series is published by Sun Microsystems Laboratories, of Sun Microsystems, Inc. Printed in U.S.A. Unlimited copying without fee is permitted provided that the copies are not made nor distributed for direct commercial advantage, and credit to the source is given. Otherwise, no part of this work covered by copyright hereon may be reproduced in any form or by any means graphic, electronic, or mechanical, including photocopying, recording, taping, or storage in an information retrieval system, without the prior written permission of the copyright owner. TRADEMARKS Sun, Sun Microsystems, the Sun logo, and Solaris are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the U.S. and other countries. Products bearing SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc. UNIX is a registered trademark in the United States and other countries, exclusively licensed through X/Open Company, Ltd. For information regarding the SML Technical Report Series, contact Jeanie Treichel, Editor-in-Chief . All technical reports are available online on our Website, http://research.sun.com/techrep/. DCAS-based Concurrent Deques Supporting Bulk Allocation Paul Martin Mark Moir Guy Steele Sun Microsystems Laboratories 1 Network Drive Burlington, MA 01803