Class Native

java.lang.Object

io.netty.channel.epoll.Native

public final class Native
extends java.lang.Object

Native helper methods

Internal usage only!

Static members which call JNI methods must be defined in NativeStaticallyReferencedJniMethods.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	EPOLLERR
static final int	EPOLLET
static final int	EPOLLIN
static final int	EPOLLOUT
static final int	EPOLLRDHUP
(package private) static final java.net.InetAddress	INET_ANY
(package private) static final java.net.InetAddress	INET6_ANY
(package private) static final boolean	IS_SUPPORTING_RECVMMSG
static final boolean	IS_SUPPORTING_SENDMMSG
static final boolean	IS_SUPPORTING_TCP_FASTOPEN	Deprecated. Use Epoll.isTcpFastOpenClientSideAvailable() or Epoll.isTcpFastOpenServerSideAvailable().
(package private) static final boolean	IS_SUPPORTING_TCP_FASTOPEN_CLIENT	tcp_fastopen client mode enabled state.
(package private) static final boolean	IS_SUPPORTING_TCP_FASTOPEN_SERVER	tcp_fastopen server mode enabled state.
(package private) static final boolean	IS_SUPPORTING_UDP_SEGMENT
static final java.lang.String	KERNEL_VERSION
private static final InternalLogger	logger
private static final int	TCP_FASTOPEN_MODE
static final int	TCP_MD5SIG_MAXKEYLEN
private static final int	TFO_ENABLED_CLIENT_MASK
private static final int	TFO_ENABLED_SERVER_MASK

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Native()

Method Summary

Modifier and Type	Method	Description
static int	epollBusyWait(FileDescriptor epollFd, EpollEventArray events)	Non-blocking variant of epollWait(FileDescriptor, EpollEventArray, FileDescriptor, int, int) that will also hint to processor we are in a busy-wait loop.
private static int	epollBusyWait0(int efd, long address, int len)
private static int	epollCreate()
static void	epollCtlAdd(int efd, int fd, int flags)
private static int	epollCtlAdd0(int efd, int fd, int flags)
static void	epollCtlDel(int efd, int fd)
private static int	epollCtlDel0(int efd, int fd)
static void	epollCtlMod(int efd, int fd, int flags)
private static int	epollCtlMod0(int efd, int fd, int flags)
(package private) static int	epollReady(long result)
(package private) static boolean	epollTimerWasUsed(long result)
private static int	epollWait(int efd, long address, int len, int timeout)
(package private) static int	epollWait(FileDescriptor epollFd, EpollEventArray events, boolean immediatePoll)
(package private) static int	epollWait(FileDescriptor epollFd, EpollEventArray events, int timeoutMillis)	This uses epoll's own timeout and does not reset/re-arm any timerfd
static int	epollWait(FileDescriptor epollFd, EpollEventArray events, FileDescriptor timerFd, int timeoutSec, int timeoutNs)	Deprecated. this method is no longer supported.
(package private) static long	epollWait(FileDescriptor epollFd, EpollEventArray events, FileDescriptor timerFd, int timeoutSec, int timeoutNs, long millisThreshold)
private static long	epollWait0(int efd, long address, int len, int timerFd, int timeoutSec, int timeoutNs, long millisThreshold)
private static int	eventFd()
static void	eventFdRead(int fd)
static void	eventFdWrite(int fd, long value)
private static boolean	isSupportingUdpSegment()
private static void	loadNativeLibrary()
static FileDescriptor	newEpollCreate()
static FileDescriptor	newEventFd()
static FileDescriptor	newTimerFd()
static int	offsetofEpollData()
(package private) static int	recvmmsg(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len)
private static int	recvmmsg0(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len)
(package private) static int	recvmsg(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket packet)
private static int	recvmsg0(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket msg)
private static int	registerUnix()
(package private) static int	sendmmsg(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len)
static int	sendmmsg(int fd, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len)	Deprecated.
private static int	sendmmsg0(int fd, boolean ipv6, NativeDatagramPacketArray.NativeDatagramPacket[] msgs, int offset, int len)
static int	sizeofEpollEvent()
static int	splice(int fd, long offIn, int fdOut, long offOut, long len)
private static int	splice0(int fd, long offIn, int fdOut, long offOut, long len)
private static int	timerFd()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

logger

private static final InternalLogger logger

INET6_ANY

static final java.net.InetAddress INET6_ANY

INET_ANY

static final java.net.InetAddress INET_ANY

EPOLLIN

public static final int EPOLLIN

EPOLLOUT

public static final int EPOLLOUT

EPOLLRDHUP

public static final int EPOLLRDHUP

EPOLLET

public static final int EPOLLET

EPOLLERR

public static final int EPOLLERR

IS_SUPPORTING_SENDMMSG

public static final boolean IS_SUPPORTING_SENDMMSG

IS_SUPPORTING_RECVMMSG

static final boolean IS_SUPPORTING_RECVMMSG

IS_SUPPORTING_UDP_SEGMENT

static final boolean IS_SUPPORTING_UDP_SEGMENT

TFO_ENABLED_CLIENT_MASK

private static final int TFO_ENABLED_CLIENT_MASK

See Also:

• Constant Field Values

TFO_ENABLED_SERVER_MASK

private static final int TFO_ENABLED_SERVER_MASK

See Also:

• Constant Field Values

TCP_FASTOPEN_MODE

private static final int TCP_FASTOPEN_MODE

IS_SUPPORTING_TCP_FASTOPEN_CLIENT

static final boolean IS_SUPPORTING_TCP_FASTOPEN_CLIENT

tcp_fastopen client mode enabled state.

IS_SUPPORTING_TCP_FASTOPEN_SERVER

static final boolean IS_SUPPORTING_TCP_FASTOPEN_SERVER

tcp_fastopen server mode enabled state.

IS_SUPPORTING_TCP_FASTOPEN

@Deprecated
public static final boolean IS_SUPPORTING_TCP_FASTOPEN

Deprecated.

Use Epoll.isTcpFastOpenClientSideAvailable() or Epoll.isTcpFastOpenServerSideAvailable().

TCP_MD5SIG_MAXKEYLEN

public static final int TCP_MD5SIG_MAXKEYLEN

KERNEL_VERSION

public static final java.lang.String KERNEL_VERSION

Constructor Details

Native

private Native()

Method Details

registerUnix

private static int registerUnix()

newEventFd

public static FileDescriptor newEventFd()

newTimerFd

public static FileDescriptor newTimerFd()

isSupportingUdpSegment

private static boolean isSupportingUdpSegment()

eventFd

private static int eventFd()

timerFd

private static int timerFd()

eventFdWrite

public static void eventFdWrite(int fd,
 long value)

eventFdRead

public static void eventFdRead(int fd)

newEpollCreate

public static FileDescriptor newEpollCreate()

epollCreate

private static int epollCreate()

epollWait

@Deprecated
public static int epollWait(FileDescriptor epollFd,
 EpollEventArray events,
 FileDescriptor timerFd,
 int timeoutSec,
 int timeoutNs)
                     throws java.io.IOException

Deprecated.

this method is no longer supported. This functionality is internal to this package.

Throws:

java.io.IOException

epollWait

static long epollWait(FileDescriptor epollFd,
 EpollEventArray events,
 FileDescriptor timerFd,
 int timeoutSec,
 int timeoutNs,
 long millisThreshold)
               throws java.io.IOException

Throws:

java.io.IOException

epollReady

static int epollReady(long result)

epollTimerWasUsed

static boolean epollTimerWasUsed(long result)

epollWait

static int epollWait(FileDescriptor epollFd,
 EpollEventArray events,
 boolean immediatePoll)
              throws java.io.IOException

Throws:

java.io.IOException

epollWait

static int epollWait(FileDescriptor epollFd,
 EpollEventArray events,
 int timeoutMillis)
              throws java.io.IOException

This uses epoll's own timeout and does not reset/re-arm any timerfd

Throws:

java.io.IOException

epollBusyWait

public static int epollBusyWait(FileDescriptor epollFd,
 EpollEventArray events)
                         throws java.io.IOException

Non-blocking variant of epollWait(FileDescriptor, EpollEventArray, FileDescriptor, int, int) that will also hint to processor we are in a busy-wait loop.

Throws:

java.io.IOException

epollWait0

private static long epollWait0(int efd,
 long address,
 int len,
 int timerFd,
 int timeoutSec,
 int timeoutNs,
 long millisThreshold)

epollWait

private static int epollWait(int efd,
 long address,
 int len,
 int timeout)

epollBusyWait0

private static int epollBusyWait0(int efd,
 long address,
 int len)

epollCtlAdd

public static void epollCtlAdd(int efd,
 int fd,
 int flags)
                        throws java.io.IOException

Throws:

java.io.IOException

epollCtlAdd0

private static int epollCtlAdd0(int efd,
 int fd,
 int flags)

epollCtlMod

public static void epollCtlMod(int efd,
 int fd,
 int flags)
                        throws java.io.IOException

Throws:

java.io.IOException

epollCtlMod0

private static int epollCtlMod0(int efd,
 int fd,
 int flags)

epollCtlDel

public static void epollCtlDel(int efd,
 int fd)
                        throws java.io.IOException

Throws:

java.io.IOException

epollCtlDel0

private static int epollCtlDel0(int efd,
 int fd)

splice

public static int splice(int fd,
 long offIn,
 int fdOut,
 long offOut,
 long len)
                  throws java.io.IOException

Throws:

java.io.IOException

splice0

private static int splice0(int fd,
 long offIn,
 int fdOut,
 long offOut,
 long len)

sendmmsg

@Deprecated
public static int sendmmsg(int fd,
 NativeDatagramPacketArray.NativeDatagramPacket[] msgs,
 int offset,
 int len)
                    throws java.io.IOException

Deprecated.

Throws:

java.io.IOException

sendmmsg

static int sendmmsg(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket[] msgs,
 int offset,
 int len)
             throws java.io.IOException

Throws:

java.io.IOException

sendmmsg0

private static int sendmmsg0(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket[] msgs,
 int offset,
 int len)

recvmmsg

static int recvmmsg(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket[] msgs,
 int offset,
 int len)
             throws java.io.IOException

Throws:

java.io.IOException

recvmmsg0

private static int recvmmsg0(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket[] msgs,
 int offset,
 int len)

recvmsg

static int recvmsg(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket packet)
            throws java.io.IOException

Throws:

java.io.IOException

recvmsg0

private static int recvmsg0(int fd,
 boolean ipv6,
 NativeDatagramPacketArray.NativeDatagramPacket msg)

sizeofEpollEvent

public static int sizeofEpollEvent()

offsetofEpollData

public static int offsetofEpollData()

loadNativeLibrary

private static void loadNativeLibrary()