RFR: 8140241: (fc) Data transfer from FileChannel to itself causes hang in case of overlap [v5]

[Alan Bateman]

On Wed, 11 Aug 2021 19:50:49 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> This request proposes to fix a failure on macOS which occurs when transferring to or from a file channel from or to the same file channel when the source and destination intervals overlap.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8140241: Use pattern matching; remove sync on position lock

Marked as reviewed by alanb (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5061