StructPollfd

public final class StructPollfd
extends Object

java.lang.Object
   ↳ android.system.StructPollfd


Used as an in/out parameter to Os.poll(StructPollfd[], int). 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

Fields

events

added in API level 21
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.

fd

added in API level 21
public FileDescriptor fd

The file descriptor to poll.

revents

added in API level 21
public short revents

The events that actually happened.

userData

added in API level 21
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

StructPollfd

added in API level 21
public StructPollfd ()

Public methods

toString

added in API level 21
public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Returns
String a string representation of the object.