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Minimal Ownership for Active Objects

Authors: David Clarke, Tobias Wrigstad, Johan Ostlund, and Einar Broch Johnsen

Published in: Dagstuhl Seminar Proceedings, Volume 9301, Typing, Analysis and Verification of Heap-Manipulating Programs (2010)

Abstract

Active objects offer a structured approach to concurrency, encapsulating both unshared state and a thread of control. For efficient data transfer, data should be passed by reference whenever possible, but this introduces aliasing and undermines the validity of the active objects. This paper proposes a minimal variant of ownership types that preserves the required race freedom invariant yet enables data transfer by reference between active objects (that is, without copying) in many cases, and a cheap clone operation where copying is necessary. Our approach is general and should be adaptable to several existing active object systems.

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David Clarke, Tobias Wrigstad, Johan Ostlund, and Einar Broch Johnsen. Minimal Ownership for Active Objects. In Typing, Analysis and Verification of Heap-Manipulating Programs. Dagstuhl Seminar Proceedings, Volume 9301, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2010)

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@InProceedings{clarke_et_al:DagSemProc.09301.3,
  author =	{Clarke, David and Wrigstad, Tobias and Ostlund, Johan and Johnsen, Einar Broch},
  title =	{{Minimal Ownership for Active Objects}},
  booktitle =	{Typing, Analysis and Verification of Heap-Manipulating Programs},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2010},
  volume =	{9301},
  editor =	{Peter O'Hearn and Arnd Poetzsch-Heffter and Mooly Sagiv},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09301.3},
  URN =		{urn:nbn:de:0030-drops-24379},
  doi =		{10.4230/DagSemProc.09301.3},
  annote =	{Keywords: Ownership, concurrency, uniqueness, active objects}
}

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Minimal Ownership for Active Objects

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