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8282726: java/net/vthread/BlockingSocketOps.java timeout/hang intermittently on Windows

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Reviewed-by: djelinski
This commit is contained in:
Alan Bateman 2023-11-21 14:05:32 +00:00
parent 923207073a
commit 21a59b9f4e
8 changed files with 31 additions and 33 deletions
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20
src/java.base/share/classes/sun/nio/ch/Poller.java
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@ -94,14 +94,16 @@ abstract class Poller {
}
/**
* Register the file descriptor.
* Register the file descriptor. The registration is "one shot", meaning it should
* be polled at most once.
*/
abstract void implRegister(int fdVal) throws IOException;
/**
* Deregister the file descriptor.
* @param polled true if the file descriptor has already been polled
*/
abstract void implDeregister(int fdVal);
abstract void implDeregister(int fdVal, boolean polled);
/**
* Poll for events. The {@link #polled(int)} method is invoked for each
@ -182,23 +184,23 @@ abstract class Poller {
}
/**
* Registers the file descriptor.
* Registers the file descriptor to be polled at most once when the file descriptor
* is ready for I/O.
*/
private void register(int fdVal) throws IOException {
Thread previous = map.putIfAbsent(fdVal, Thread.currentThread());
Thread previous = map.put(fdVal, Thread.currentThread());
assert previous == null;
implRegister(fdVal);
}
/**
* Deregister the file descriptor, a no-op if already polled.
* Deregister the file descriptor so that the file descriptor is not polled.
*/
private void deregister(int fdVal) {
Thread previous = map.remove(fdVal);
assert previous == null || previous == Thread.currentThread();
if (previous != null) {
implDeregister(fdVal);
}
boolean polled = (previous == null);
assert polled || previous == Thread.currentThread();
implDeregister(fdVal, polled);
}
/**