Asynchronous Transfer of Control

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Intro

  • An ATC is where the point of execution of one SO is changed by the action of another SO.
  • Therefore an SO may be executing on 1 method and through no action of its own, find itself executing in another method.
  • Controversial:
    • Complicates language semantics.
    • Makes it difficult to write correct code as it may be interfered with.
    • Increases complexity of the RTJVM.
    • Slow down code which does not use the feature.

Requirements for ATC