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Copy pathPollfd.java
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111 lines (100 loc) · 2.78 KB
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/*
* Copyright 2018 Klaus Reimer <k@ailis.de>
* See LICENSE.md for licensing information.
*
* Based on libusb <http://libusb.info/>:
*
* Copyright 2001 Johannes Erdfelt <johannes@erdfelt.com>
* Copyright 2007-2009 Daniel Drake <dsd@gentoo.org>
* Copyright 2010-2012 Peter Stuge <peter@stuge.se>
* Copyright 2008-2013 Nathan Hjelm <hjelmn@users.sourceforge.net>
* Copyright 2009-2013 Pete Batard <pete@akeo.ie>
* Copyright 2009-2013 Ludovic Rousseau <ludovic.rousseau@gmail.com>
* Copyright 2010-2012 Michael Plante <michael.plante@gmail.com>
* Copyright 2011-2013 Hans de Goede <hdegoede@redhat.com>
* Copyright 2012-2013 Martin Pieuchot <mpi@openbsd.org>
* Copyright 2012-2013 Toby Gray <toby.gray@realvnc.com>
*/
package org.usb4java;
/**
* File descriptor for polling.
*
* @author Klaus Reimer (k@ailis.de)
*/
public final class Pollfd
{
/** There is data to read */
public static final int POLLIN = 1;
/** Writing now will not block. */
public static final int POLLOUT = 4;
/** The native pointer to the pollfd structure. */
private long pollfdPointer;
/**
* Package-private constructor to prevent manual instantiation. Structures are
* always created by JNI.
*/
Pollfd()
{
// Empty
}
/**
* Returns the native pointer to the pollfd structure.
*
* @return The native pointer to the pollfd structure.
*/
public long getPointer()
{
return this.pollfdPointer;
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = (prime * result)
+ (int) (this.pollfdPointer ^ (this.pollfdPointer >>> 32));
return result;
}
@Override
public boolean equals(final Object obj)
{
if (this == obj)
{
return true;
}
if (obj == null)
{
return false;
}
if (this.getClass() != obj.getClass())
{
return false;
}
final Pollfd other = (Pollfd) obj;
if (this.pollfdPointer != other.pollfdPointer)
{
return false;
}
return true;
}
@Override
public String toString()
{
return String.format("libusb pollfd 0x%x", this.pollfdPointer);
}
/**
* Returns the numeric file descriptor.
*
* @return The numeric file descriptor.
*/
public native byte fd();
/**
* Returns the event flags to poll.
*
* {@link #POLLIN} indicates that you should monitor this file descriptor for becoming ready to read from, and
* {@link #POLLOUT} indicates that you should monitor this file descriptor for non-blocking write readiness.
*
* @return The event flags to poll.
*/
public native short events();
}