RFR: 8266369: (se) Add wepoll based Selector [v4]

[Alan Bateman]

On Wed, 5 May 2021 14:42:25 GMT, Patrick Concannon <pconcannon at openjdk.org> wrote:

>> Alan Bateman has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Remove unused WEPoll.getDescriptor. Update micro to close listener
>
> src/java.base/windows/native/libnio/ch/WEPollNatives.c line 56:
> 
>> 54: Java_sun_nio_ch_WEPoll_create(JNIEnv *env, jclass clazz) {
>> 55:     HANDLE h = epoll_create1(0);
>> 56:     if (h < 0) {
> 
> Just wondering should you be checking for `NULL` here instead?

Well spotted, it should check for NULL (a subtle difference with regular epoll_create1).

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PR: https://git.openjdk.java.net/jdk/pull/3816