65 lines
1.9 KiB
Java
65 lines
1.9 KiB
Java
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/*
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* Copyright 2014 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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/**
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* Tells if <a href="http://netty.io/wiki/native-transports.html">{@code netty-transport-native-epoll}</a> is supported.
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*/
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public final class Epoll {
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private static final boolean IS_AVAILABLE;
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static {
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boolean available;
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int epollFd = -1;
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int eventFd = -1;
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try {
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epollFd = Native.epollCreate();
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eventFd = Native.eventFd();
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available = true;
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} catch (Throwable cause) {
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// ignore
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available = false;
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} finally {
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if (epollFd != -1) {
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try {
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Native.close(epollFd);
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} catch (Exception ignore) {
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// ignore
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}
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}
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if (eventFd != -1) {
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try {
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Native.close(eventFd);
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} catch (Exception ignore) {
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// ignore
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}
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}
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}
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IS_AVAILABLE = available;
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}
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/**
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* Returns {@code true} if and only if the
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* <a href="http://netty.io/wiki/native-transports.html">{@code netty-transport-native-epoll}</a> can be used.
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*/
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public static boolean isAvailable() {
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return IS_AVAILABLE;
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}
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private Epoll() { }
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}
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