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8199611: (se) Minor selector implementation clean-up

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Reviewed-by: clanger, redestad, bpb
This commit is contained in:
Alan Bateman 2018-03-15 10:47:58 +00:00
parent 8994d5ad0e
commit 3a7f72200c
15 changed files with 238 additions and 249 deletions
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44
src/java.base/share/classes/sun/nio/ch/SelectorImpl.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -30,7 +30,6 @@ import java.net.SocketException;
import java.nio.channels.ClosedSelectorException;
import java.nio.channels.IllegalSelectorException;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.spi.AbstractSelectableChannel;
import java.nio.channels.spi.AbstractSelector;
import java.nio.channels.spi.SelectorProvider;
@ -47,16 +46,15 @@ import java.util.Set;
public abstract class SelectorImpl
extends AbstractSelector
{
// The set of keys registered with this Selector
protected final HashSet<SelectionKey> keys;
// The set of keys with data ready for an operation
protected Set<SelectionKey> selectedKeys;
// The set of keys registered with this Selector
protected HashSet<SelectionKey> keys;
protected final Set<SelectionKey> selectedKeys;
// Public views of the key sets
private Set<SelectionKey> publicKeys; // Immutable
private Set<SelectionKey> publicSelectedKeys; // Removal allowed, but not addition
private final Set<SelectionKey> publicKeys; // Immutable
private final Set<SelectionKey> publicSelectedKeys; // Removal allowed, but not addition
protected SelectorImpl(SelectorProvider sp) {
super(sp);
@ -66,13 +64,15 @@ public abstract class SelectorImpl
publicSelectedKeys = Util.ungrowableSet(selectedKeys);
}
public Set<SelectionKey> keys() {
@Override
public final Set<SelectionKey> keys() {
if (!isOpen())
throw new ClosedSelectorException();
return publicKeys;
}
public Set<SelectionKey> selectedKeys() {
@Override
public final Set<SelectionKey> selectedKeys() {
if (!isOpen())
throw new ClosedSelectorException();
return publicSelectedKeys;
@ -92,7 +92,8 @@ public abstract class SelectorImpl
}
}
public int select(long timeout)
@Override
public final int select(long timeout)
throws IOException
{
if (timeout < 0)
@ -100,15 +101,18 @@ public abstract class SelectorImpl
return lockAndDoSelect((timeout == 0) ? -1 : timeout);
}
public int select() throws IOException {
@Override
public final int select() throws IOException {
return select(0);
}
public int selectNow() throws IOException {
@Override
public final int selectNow() throws IOException {
return lockAndDoSelect(0);
}
public void implCloseSelector() throws IOException {
@Override
public final void implCloseSelector() throws IOException {
wakeup();
synchronized (this) {
synchronized (publicKeys) {
@ -121,8 +125,9 @@ public abstract class SelectorImpl
protected abstract void implClose() throws IOException;
public void putEventOps(SelectionKeyImpl sk, int ops) { }
public abstract void putEventOps(SelectionKeyImpl sk, int ops);
@Override
protected final SelectionKey register(AbstractSelectableChannel ch,
int ops,
Object attachment)
@ -140,7 +145,9 @@ public abstract class SelectorImpl
protected abstract void implRegister(SelectionKeyImpl ski);
void processDeregisterQueue() throws IOException {
protected abstract void implDereg(SelectionKeyImpl ski) throws IOException;
protected final void processDeregisterQueue() throws IOException {
// Precondition: Synchronized on this, keys, and selectedKeys
Set<SelectionKey> cks = cancelledKeys();
synchronized (cks) {
@ -159,9 +166,4 @@ public abstract class SelectorImpl
}
}
}
protected abstract void implDereg(SelectionKeyImpl ski) throws IOException;
public abstract Selector wakeup();
}