author | alanb |
Fri, 23 Mar 2018 14:18:18 +0000 | |
changeset 49290 | 07779973cbe2 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include <dlfcn.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/epoll.h> |
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||
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#include "jni.h" |
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#include "jni_util.h" |
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#include "jvm.h" |
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#include "jlong.h" |
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#include "nio.h" |
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#include "nio_util.h" |
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#include "sun_nio_ch_EPoll.h" |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_eventSize(JNIEnv* env, jclass clazz) |
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{ |
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return sizeof(struct epoll_event); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_eventsOffset(JNIEnv* env, jclass clazz) |
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{ |
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return offsetof(struct epoll_event, events); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_dataOffset(JNIEnv* env, jclass clazz) |
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{ |
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return offsetof(struct epoll_event, data); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_create(JNIEnv *env, jclass clazz) { |
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/* size hint not used in modern kernels */ |
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int epfd = epoll_create(256); |
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if (epfd < 0) { |
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JNU_ThrowIOExceptionWithLastError(env, "epoll_create failed"); |
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} |
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return epfd; |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_ctl(JNIEnv *env, jclass clazz, jint epfd, |
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jint opcode, jint fd, jint events) |
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{ |
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struct epoll_event event; |
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int res; |
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event.events = events; |
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event.data.fd = fd; |
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res = epoll_ctl(epfd, (int)opcode, (int)fd, &event); |
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return (res == 0) ? 0 : errno; |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_EPoll_wait(JNIEnv *env, jclass clazz, jint epfd, |
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jlong address, jint numfds, jint timeout) |
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{ |
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struct epoll_event *events = jlong_to_ptr(address); |
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int res = epoll_wait(epfd, events, numfds, timeout); |
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if (res < 0) { |
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if (errno == EINTR) { |
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return IOS_INTERRUPTED; |
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} else { |
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JNU_ThrowIOExceptionWithLastError(env, "epoll_wait failed"); |
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return IOS_THROWN; |
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} |
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} |
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return res; |
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} |