Add a VarHandle weakCompareAndSet with volatile semantics

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    • Type: Sub-task
    • Resolution: Fixed
    • Priority: P4
    • 9
    • Affects Version/s: None
    • Component/s: core-libs

      VarHandle has a weakCompareAndSet method with "plain" semantics.

      A compareAndSet cannot reliably be replaced with a weak variant on platforms that support LL/SC. See here for more details:

      http://mail.openjdk.java.net/pipermail/jmm-dev/2016-April/000239.html

      A variant with "volatile" semantics should be added e.g. weakCompareAndSetVolatile.

      JDK change:
       http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8154755-weak-cas-volatile/webrev/

            Assignee:
            Paul Sandoz
            Reporter:
            Paul Sandoz
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              Created:
              Updated:
              Resolved: