f7fadd67dd
Motivation: Netty uses epoll edge-triggered by default forever and there is really not reason why someone should use level-triggered (its considered a implementation detail). Modifications: - Remove code that was related to level-triggered mode - Adjust testclass names Result: Fixes https://github.com/netty/netty/issues/9349
194 lines
6.4 KiB
Java
194 lines
6.4 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.epoll;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelConfig;
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import io.netty.channel.ChannelOutboundBuffer;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.EventLoop;
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import io.netty.channel.unix.DomainSocketAddress;
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import io.netty.channel.unix.DomainSocketChannel;
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import io.netty.channel.unix.FileDescriptor;
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import io.netty.channel.unix.PeerCredentials;
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import io.netty.util.internal.UnstableApi;
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import java.io.IOException;
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import java.net.SocketAddress;
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import static io.netty.channel.epoll.LinuxSocket.newSocketDomain;
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public final class EpollDomainSocketChannel extends AbstractEpollStreamChannel implements DomainSocketChannel {
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private final EpollDomainSocketChannelConfig config = new EpollDomainSocketChannelConfig(this);
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private volatile DomainSocketAddress local;
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private volatile DomainSocketAddress remote;
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public EpollDomainSocketChannel(EventLoop eventLoop) {
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super(eventLoop, newSocketDomain(), false);
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}
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EpollDomainSocketChannel(Channel parent, EventLoop eventLoop, FileDescriptor fd) {
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super(parent, eventLoop, new LinuxSocket(fd.intValue()));
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}
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public EpollDomainSocketChannel(EventLoop eventLoop, int fd) {
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super(eventLoop, fd);
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}
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public EpollDomainSocketChannel(Channel parent, EventLoop eventLoop, LinuxSocket fd) {
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super(parent, eventLoop, fd);
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}
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public EpollDomainSocketChannel(int fd, EventLoop eventLoop, boolean active) {
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super(eventLoop, new LinuxSocket(fd), active);
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}
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@Override
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protected AbstractEpollUnsafe newUnsafe() {
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return new EpollDomainUnsafe();
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}
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@Override
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protected DomainSocketAddress localAddress0() {
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return local;
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}
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@Override
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protected DomainSocketAddress remoteAddress0() {
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return remote;
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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socket.bind(localAddress);
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local = (DomainSocketAddress) localAddress;
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}
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@Override
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public EpollDomainSocketChannelConfig config() {
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return config;
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}
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@Override
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protected boolean doConnect(SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
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if (super.doConnect(remoteAddress, localAddress)) {
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local = (DomainSocketAddress) localAddress;
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remote = (DomainSocketAddress) remoteAddress;
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return true;
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}
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return false;
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}
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@Override
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public DomainSocketAddress remoteAddress() {
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return (DomainSocketAddress) super.remoteAddress();
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}
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@Override
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public DomainSocketAddress localAddress() {
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return (DomainSocketAddress) super.localAddress();
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}
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@Override
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protected int doWriteSingle(ChannelOutboundBuffer in) throws Exception {
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Object msg = in.current();
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if (msg instanceof FileDescriptor && socket.sendFd(((FileDescriptor) msg).intValue()) > 0) {
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// File descriptor was written, so remove it.
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in.remove();
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return 1;
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}
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return super.doWriteSingle(in);
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}
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@Override
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protected Object filterOutboundMessage(Object msg) {
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if (msg instanceof FileDescriptor) {
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return msg;
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}
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return super.filterOutboundMessage(msg);
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}
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/**
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* Returns the unix credentials (uid, gid, pid) of the peer
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* <a href=http://man7.org/linux/man-pages/man7/socket.7.html>SO_PEERCRED</a>
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*/
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@UnstableApi
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public PeerCredentials peerCredentials() throws IOException {
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return socket.getPeerCredentials();
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}
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private final class EpollDomainUnsafe extends EpollStreamUnsafe {
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@Override
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void epollInReady() {
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switch (config().getReadMode()) {
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case BYTES:
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super.epollInReady();
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break;
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case FILE_DESCRIPTORS:
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epollInReadFd();
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break;
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default:
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throw new Error();
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}
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}
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private void epollInReadFd() {
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if (socket.isInputShutdown()) {
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clearEpollIn0();
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return;
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}
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final ChannelConfig config = config();
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final EpollRecvByteAllocatorHandle allocHandle = recvBufAllocHandle();
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final ChannelPipeline pipeline = pipeline();
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allocHandle.reset(config);
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epollInBefore();
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try {
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readLoop: do {
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// lastBytesRead represents the fd. We use lastBytesRead because it must be set so that the
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// EpollRecvByteAllocatorHandle knows if it should try to read again or not when autoRead is
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// enabled.
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allocHandle.lastBytesRead(socket.recvFd());
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switch(allocHandle.lastBytesRead()) {
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case 0:
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break readLoop;
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case -1:
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close(voidPromise());
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return;
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default:
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allocHandle.incMessagesRead(1);
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readPending = false;
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pipeline.fireChannelRead(new FileDescriptor(allocHandle.lastBytesRead()));
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break;
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}
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} while (allocHandle.continueReading());
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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} catch (Throwable t) {
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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pipeline.fireExceptionCaught(t);
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} finally {
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readIfIsAutoRead();
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epollInFinally(config);
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}
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}
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}
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}
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