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  1. JDK
  2. JDK-8080588 VarHandles development
  3. JDK-8154755

Add a VarHandle weakCompareAndSet with volatile semantics

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    • Sub-task
    • Resolution: Fixed
    • P4
    • 9
    • None
    • core-libs

    Description

      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/

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          relates to

          Sub-task - The sub-task of the issue JDK-8155965 Unsafe.weakCompareAndSetVolatile entry points and intrinsics

          • P3 - Major loss of function.
          • Resolved

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              psandoz Paul Sandoz
              psandoz Paul Sandoz
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                Created:
                Updated:
                Resolved: