On Helping and Stacks

  • Vitaly AksenovEmail author
  • Petr Kuznetsov
  • Anatoly Shalyto
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11028)


A concurrent algorithm exhibits helping when one process performs work on behalf of other processes. More formally, helping is observed when the order of some operation in a linearization is fixed by a step of another process. In this paper, we show that no wait-free linearizable implementation of a stack using read, write, compare&swap and fetch&add operations can be help-free, correcting a mistake in an earlier proof by Censor-Hillel et al.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Vitaly Aksenov
    • 1
    • 2
    Email author
  • Petr Kuznetsov
    • 3
  • Anatoly Shalyto
    • 1
  1. 1.ITMO UniversitySaint PetersburgRussia
  2. 2.Inria ParisParisFrance
  3. 3.LTCI, Télécom ParisTechUniversité Paris-SaclayParisFrance

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