StructPollfd

Summary: Fields | Ctors | Methods | Inherited Methods

public final class StructPollfd
extends Object

Used as an in/out parameter to Os.poll. Corresponds to C's struct pollfd from <poll.h>.

Summary

Fields
`public short`	`events` The events we're interested in.
`public FileDescriptor`	`fd` The file descriptor to poll.
`public short`	`revents` The events that actually happened.
`public Object`	`userData` A non-standard extension that lets callers conveniently map back to the object their fd belongs to.

Public constructors
`StructPollfd()`

Public methods
`String`	`toString()` Returns a string representation of the object.

Inherited methods

From class java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Fields

events

public short events

The events we're interested in. POLLIN corresponds to being in select(2)'s read fd set, POLLOUT to the write fd set.

revents

public short revents

The events that actually happened.

userData

public Object userData

A non-standard extension that lets callers conveniently map back to the object their fd belongs to. This is used by Selector, for example, to associate each FileDescriptor with the corresponding SelectionKey.

Public constructors

public StructPollfd ()

Public methods

toString

public String toString ()

Returns a string representation of the object.

Returns
`String`	a string representation of the object.

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.