OpenJDK 27 · sun.nio.ch.PollSelectorImpl · APIdia, the JavaDoc alternative

Field Summary

Modifier and Type	Field and Description
private static final short	EVENT_OFFSET
private final int	fd0
private final int	fd1
private static final short	FD_OFFSET
private static final int	INITIAL_CAPACITY
private final Object	interruptLock
private boolean	interruptTriggered
private AllocatedNativeObject	pollArray
private int	pollArrayCapacity
private int	pollArraySize
private final List<SelectionKeyImpl>	pollKeys
private static final short	REVENT_OFFSET
private static final short	SIZE_POLLFD
private final Deque<SelectionKeyImpl>	updateKeys
private final Object	updateLock

Access	Constructor and Description
pack-priv	PollSelectorImpl(SelectorProvider sp)

Method Summary

Modifier and Type	Method and Description
private void	add(SelectionKeyImpl ski, int ops) Adds a pollfd entry to the poll array, expanding the poll array if needed.
private void	clearInterrupt()
protected int	doSelect(Consumer<SelectionKey> action, long timeout) Implements abstract sun.nio.ch.SelectorImpl.doSelect. Selects the keys for channels that are ready for I/O operations.
private void	ensureOpen() Hides sun.nio.ch.SelectorImpl.ensureOpen.
private void	expandIfNeeded() Expand poll array if at capacity
private int	getDescriptor(int i)
private int	getEventOps(int i)
private int	getReventOps(int i)
protected void	implClose() Implements abstract sun.nio.ch.SelectorImpl.implClose. Invoked by implCloseSelector to close the selector.
protected void	implDereg(SelectionKeyImpl ski) Implements abstract sun.nio.ch.SelectorImpl.implDereg. Removes the key from the selector
protected void	implRegister(SelectionKeyImpl ski) Overrides sun.nio.ch.SelectorImpl.implRegister. Register the key in the selector.
private static native int	poll(long pollAddress, int numfds, int timeout)
private int	processEvents(Consumer<SelectionKey> action) Process the polled events.
private void	processUpdateQueue() Process changes to the interest ops.
private void	putDescriptor(int i, int fd)
private void	putEventOps(int i, int event)
private void	putReventOps(int i, int revent)
private void	remove(SelectionKeyImpl ski) Removes a pollfd entry from the poll array
public void	setEventOps(SelectionKeyImpl ski) Implements abstract sun.nio.ch.SelectorImpl.setEventOps. Invoked by interestOps to ensure the interest ops are updated at the next selection operation.
private void	setFirst(int fd, int ops) Sets the first pollfd entry in the poll array to the given fd
private void	update(SelectionKeyImpl ski, int ops) Update the events of pollfd entry.
public Selector	wakeup() Implements abstract java.nio.channels.Selector.wakeup. Causes the first selection operation that has not yet returned to return immediately.

Inherited from sun.nio.ch.SelectorImpl:: begin cancel end implCloseSelector keys processDeregisterQueue processReadyEvents register select select select select selectedKeys selectNow selectNow

Field Detail

EVENT_OFFSET	back to summary
private static final short EVENT_OFFSET

fd0	back to summary
private final int fd0

fd1	back to summary
private final int fd1

FD_OFFSET	back to summary
private static final short FD_OFFSET

INITIAL_CAPACITY	back to summary
private static final int INITIAL_CAPACITY

interruptLock	back to summary
private final Object interruptLock

interruptTriggered	back to summary
private boolean interruptTriggered

pollArray	back to summary
private AllocatedNativeObject pollArray

pollArrayCapacity	back to summary
private int pollArrayCapacity

pollArraySize	back to summary
private int pollArraySize

pollKeys	back to summary
private final List<SelectionKeyImpl> pollKeys

REVENT_OFFSET	back to summary
private static final short REVENT_OFFSET

SIZE_POLLFD	back to summary
private static final short SIZE_POLLFD

updateKeys	back to summary
private final Deque<SelectionKeyImpl> updateKeys

updateLock	back to summary
private final Object updateLock

Constructor Detail

PollSelectorImpl	back to summary
pack-priv PollSelectorImpl(SelectorProvider sp) throws IOException

Method Detail

add	back to summary
private void add(SelectionKeyImpl ski, int ops) Adds a pollfd entry to the poll array, expanding the poll array if needed.

clearInterrupt	back to summary
private void clearInterrupt() throws IOException

doSelect	back to summary
protected int doSelect(Consumer<SelectionKey> action, long timeout) throws IOException Implements abstract sun.nio.ch.SelectorImpl.doSelect. Doc from sun.nio.ch.SelectorImpl.doSelect. Selects the keys for channels that are ready for I/O operations. Annotations @Override

doSelect

back to summary

protected int doSelect(Consumer<SelectionKey> action, long timeout) throws IOException

Implements abstract sun.nio.ch.SelectorImpl.doSelect.

Doc from sun.nio.ch.SelectorImpl.doSelect.

Selects the keys for channels that are ready for I/O operations.

Annotations

@Override

ensureOpen	back to summary
private void ensureOpen() Hides sun.nio.ch.SelectorImpl.ensureOpen.

expandIfNeeded	back to summary
private void expandIfNeeded() Expand poll array if at capacity

getDescriptor	back to summary
private int getDescriptor(int i)

getEventOps	back to summary
private int getEventOps(int i)

getReventOps	back to summary
private int getReventOps(int i)

implClose	back to summary
protected void implClose() throws IOException Implements abstract sun.nio.ch.SelectorImpl.implClose. Doc from sun.nio.ch.SelectorImpl.implClose. Invoked by implCloseSelector to close the selector. Annotations @Override

implClose

back to summary

protected void implClose() throws IOException

Implements abstract sun.nio.ch.SelectorImpl.implClose.

Doc from sun.nio.ch.SelectorImpl.implClose.

Invoked by implCloseSelector to close the selector.

Annotations

@Override

implDereg	back to summary
protected void implDereg(SelectionKeyImpl ski) throws IOException Implements abstract sun.nio.ch.SelectorImpl.implDereg. Doc from sun.nio.ch.SelectorImpl.implDereg. Removes the key from the selector Annotations @Override

implDereg

back to summary

protected void implDereg(SelectionKeyImpl ski) throws IOException

Implements abstract sun.nio.ch.SelectorImpl.implDereg.

Doc from sun.nio.ch.SelectorImpl.implDereg.

Removes the key from the selector

Annotations

@Override

implRegister	back to summary
protected void implRegister(SelectionKeyImpl ski) Overrides sun.nio.ch.SelectorImpl.implRegister. Doc from sun.nio.ch.SelectorImpl.implRegister. Register the key in the selector. The default implementation checks if the selector is open. It should be overridden by selector implementations as needed. Annotations @Override

implRegister

back to summary

protected void implRegister(SelectionKeyImpl ski)

Overrides sun.nio.ch.SelectorImpl.implRegister.

Doc from sun.nio.ch.SelectorImpl.implRegister.

Register the key in the selector. The default implementation checks if the selector is open. It should be overridden by selector implementations as needed.

Annotations

@Override

poll	back to summary
private static native int poll(long pollAddress, int numfds, int timeout)

processEvents	back to summary
private int processEvents(Consumer<SelectionKey> action) throws IOException Process the polled events. If the interrupt fd has been selected, drain it and clear the interrupt.

processUpdateQueue	back to summary
private void processUpdateQueue() Process changes to the interest ops.

putDescriptor	back to summary
private void putDescriptor(int i, int fd)

putEventOps	back to summary
private void putEventOps(int i, int event)

putReventOps	back to summary
private void putReventOps(int i, int revent)

remove	back to summary
private void remove(SelectionKeyImpl ski) Removes a pollfd entry from the poll array

setEventOps	back to summary
public void setEventOps(SelectionKeyImpl ski) Implements abstract sun.nio.ch.SelectorImpl.setEventOps. Doc from sun.nio.ch.SelectorImpl.setEventOps. Invoked by interestOps to ensure the interest ops are updated at the next selection operation. Annotations @Override

setEventOps

back to summary

public void setEventOps(SelectionKeyImpl ski)

Implements abstract sun.nio.ch.SelectorImpl.setEventOps.

Doc from sun.nio.ch.SelectorImpl.setEventOps.

Invoked by interestOps to ensure the interest ops are updated at the next selection operation.

Annotations

@Override

setFirst	back to summary
private void setFirst(int fd, int ops) Sets the first pollfd entry in the poll array to the given fd

update	back to summary
private void update(SelectionKeyImpl ski, int ops) Update the events of pollfd entry.

wakeup back to summary

wakeup	back to summary
public Selector wakeup() Implements abstract java.nio.channels.Selector.wakeup. Doc from java.nio.channels.Selector.wakeup. Causes the first selection operation that has not yet returned to return immediately. If another thread is currently blocked in a selection operation then that invocation will return immediately. If no selection operation is currently in progress then the next invocation of a selection operation will return immediately unless `selectNow()` or `selectNow(Consumer)` is invoked in the meantime. In any case the value returned by that invocation may be non-zero. Subsequent selection operations will block as usual unless this method is invoked again in the meantime. Invoking this method more than once between two successive selection operations has the same effect as invoking it just once. Annotations @Override

public Selector wakeup()

Implements abstract java.nio.channels.Selector.wakeup.

Doc from java.nio.channels.Selector.wakeup.

Causes the first selection operation that has not yet returned to return immediately.

If another thread is currently blocked in a selection operation then that invocation will return immediately. If no selection operation is currently in progress then the next invocation of a selection operation will return immediately unless selectNow() or selectNow(Consumer) is invoked in the meantime. In any case the value returned by that invocation may be non-zero. Subsequent selection operations will block as usual unless this method is invoked again in the meantime.

Invoking this method more than once between two successive selection operations has the same effect as invoking it just once.

Annotations

@Override

pack-priv Class PollSelectorImpl

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