On Dec 2, 2014, at 1:58 AM, Doug Lea <d...@cs.oswego.edu> wrote: > On 12/01/2014 03:46 PM, Martin Buchholz wrote: >> David, Paul (i.e. Reviewers) and Doug, >> >> I'd like to commit corrections so we make progress. > > The current one looks OK to me. > (http://cr.openjdk.java.net/~martin/webrevs/openjdk9/fence-intrinsics/) >
Same here, looks ok. I anticipate we will be revisiting this area with the enhanced volatiles [1] work and related JMM updates, where there will be a public API for low-level enhanced field/array access [2]. As you rightly observed Unsafe does not currently have a get/read-acquire method. Implementations of [2] currently emulate that with a relaxed read + Unsafe.loadFence. It's something we need to add. Paul. [1] http://openjdk.java.net/jeps/193 [2] http://hg.openjdk.java.net/valhalla/valhalla/jdk/file/2d4531473a89/src/java.base/share/classes/java/lang/invoke/VarHandle.java
