On Tue, 12 Apr 2022 19:09:32 GMT, Daniel Jeliński <djelin...@openjdk.org> wrote:
>> This is the implementation of JEP 425: Virtual Threads (Preview); TBD which
>> JDK version to target.
>>
>> We will refresh this PR periodically to pick up changes and fixes from the
>> loom repo.
>>
>> Most of the new mechanisms in the HotSpot VM are disabled by default and
>> require running with `--enable-preview` to enable.
>>
>> The patch has support for x64 and aarch64 on the usual operating systems
>> (Linux, macOS, and Windows). There are stubs (calling Unimplemented) for
>> zero and some of the other ports. Additional ports can be contributed via
>> PRs against the fibers branch in the loom repo.
>>
>> There are changes in many areas. To reduce notifications/mails, the labels
>> have been trimmed down for now to hotspot, serviceability and core-libs.
>> We'll add the complete set of labels when the PR is further along.
>>
>> The changes include a refresh of java.util.concurrent and ForkJoinPool from
>> Doug Lea's CVS. These changes will probably be proposed and integrated in
>> advance of this PR.
>>
>> The changes include some non-exposed and low-level infrastructure to support
>> the (in draft) JEPs for Structured Concurrency and Scope Locals. This is to
>> make life a bit easier and avoid having to separate VM changes and juggle
>> branches at this time.
>
> src/java.base/share/classes/sun/nio/cs/StreamEncoder.java line 110:
>
>> 108:
>> 109: public void flushBuffer() throws IOException {
>> 110: if (lock instanceof InternalLock locker) {
>
> now that StreamEncoder is final, we can drop the `else` branch
Actually, we can’t in case `InternalLock.CAN_USE_INTERNAL_LOCK` is ever `false`
(which it might be if it gets exposed as a system property).
-------------
PR: https://git.openjdk.java.net/jdk/pull/8166
