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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.kqueue;

import io.netty.channel.unix.FileDescriptor;
import io.netty.channel.unix.Socket;
import io.netty.util.internal.NativeLibraryLoader;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.ThrowableUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.io.IOException;
import java.util.Locale;

import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evAdd;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evClear;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evDelete;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evDisable;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evEOF;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evEnable;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evError;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltRead;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltSock;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltUser;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltWrite;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteConnReset;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteDisconnected;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteReadClosed;
import static io.netty.channel.unix.Errors.newIOException;

/**
 * Native helper methods
 * 

Internal usage only! */ final class Native { private static final InternalLogger logger = InternalLoggerFactory.getInstance(Native.class); static { try { // First, try calling a side-effect free JNI method to see if the library was already // loaded by the application. sizeofKEvent(); } catch (UnsatisfiedLinkError ignore) { // The library was not previously loaded, load it now. loadNativeLibrary(); } Socket.initialize(); } static final short EV_ADD = evAdd(); static final short EV_ENABLE = evEnable(); static final short EV_DISABLE = evDisable(); static final short EV_DELETE = evDelete(); static final short EV_CLEAR = evClear(); static final short EV_ERROR = evError(); static final short EV_EOF = evEOF(); static final int NOTE_READCLOSED = noteReadClosed(); static final int NOTE_CONNRESET = noteConnReset(); static final int NOTE_DISCONNECTED = noteDisconnected(); static final int NOTE_RDHUP = NOTE_READCLOSED | NOTE_CONNRESET | NOTE_DISCONNECTED; // Commonly used combinations of EV defines static final short EV_ADD_CLEAR_ENABLE = (short) (EV_ADD | EV_CLEAR | EV_ENABLE); static final short EV_DELETE_DISABLE = (short) (EV_DELETE | EV_DISABLE); static final short EVFILT_READ = evfiltRead(); static final short EVFILT_WRITE = evfiltWrite(); static final short EVFILT_USER = evfiltUser(); static final short EVFILT_SOCK = evfiltSock(); static FileDescriptor newKQueue() { return new FileDescriptor(kqueueCreate()); } static int keventWait(int kqueueFd, KQueueEventArray changeList, KQueueEventArray eventList, int tvSec, int tvNsec) throws IOException { int ready = keventWait(kqueueFd, changeList.memoryAddress(), changeList.size(), eventList.memoryAddress(), eventList.capacity(), tvSec, tvNsec); if (ready < 0) { throw newIOException("kevent", ready); } return ready; } private static native int kqueueCreate(); private static native int keventWait(int kqueueFd, long changeListAddress, int changeListLength, long eventListAddress, int eventListLength, int tvSec, int tvNsec); static native int keventTriggerUserEvent(int kqueueFd, int ident); static native int keventAddUserEvent(int kqueueFd, int ident); // kevent related static native int sizeofKEvent(); static native int offsetofKEventIdent(); static native int offsetofKEventFlags(); static native int offsetofKEventFFlags(); static native int offsetofKEventFilter(); static native int offsetofKeventData(); private static void loadNativeLibrary() { String name = SystemPropertyUtil.get("os.name").toLowerCase(Locale.UK).trim(); if (!name.startsWith("mac") && !name.contains("bsd") && !name.startsWith("darwin")) { throw new IllegalStateException("Only supported on BSD"); } String staticLibName = "netty_transport_native_kqueue"; String sharedLibName = staticLibName + '_' + PlatformDependent.normalizedArch(); ClassLoader cl = PlatformDependent.getClassLoader(Native.class); try { NativeLibraryLoader.load(sharedLibName, cl); } catch (UnsatisfiedLinkError e1) { try { NativeLibraryLoader.load(staticLibName, cl); logger.debug("Failed to load {}", sharedLibName, e1); } catch (UnsatisfiedLinkError e2) { ThrowableUtil.addSuppressed(e1, e2); throw e1; } } } private Native() { // utility } }





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