[concurrency-interest] Propagation of signals to non-interrupted thread

David Holmes davidcholmes at aapt.net.au
Mon Nov 14 17:15:28 EST 2011


Actually I was referring to the spec around wait/notify not Condition.await.

Note that "Implementation Consideration" is not the same as an
"Implementation Note" - this is still very much a part of the spec. These
items are called out specifically to the attention of implementors because
they need to think about them and if necessary document them.

David
  -----Original Message-----
  From: Martin Buchholz [mailto:martinrb at google.com]
  Sent: Monday, 14 November 2011 1:31 PM
  To: dholmes at ieee.org
  Cc: David M. Lloyd; Dr Heinz M. Kabutz; concurrency-interest at cs.oswego.edu
  Subject: Re: [concurrency-interest] Propagation of signals to
non-interrupted thread





    The propagation here is nothing to do with poorly written code but a
    work-around for lack of detail in the spec prior to JDK 5 that allowed
an
    interrupted thread to consume a notification.


  I rediscovered this spec:


        * <p>An implementation can favor responding to an interrupt over
normal
       * method return in response to a signal. In that case the
implementation
       * must ensure that the signal is redirected to another waiting
thread, if
       * there is one.


  but this is an "Implementation Consideration" and it could be clearer that
a thread returning abnormally from await cannot cause a lost signal.
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