| /* |
| * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "jlong.h" |
| |
| #include "sun_nio_ch_AixPollPort.h" |
| |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <poll.h> |
| #include <sys/pollset.h> |
| #include <fcntl.h> |
| #include <stddef.h> |
| #include <dlfcn.h> |
| #include <errno.h> |
| |
| /* Initially copied from src/solaris/native/sun/nio/ch/nio_util.h */ |
| #define RESTARTABLE(_cmd, _result) do { \ |
| do { \ |
| _result = _cmd; \ |
| } while((_result == -1) && (errno == EINTR)); \ |
| } while(0) |
| |
| typedef pollset_t pollset_create_func(int maxfd); |
| typedef int pollset_destroy_func(pollset_t ps); |
| typedef int pollset_ctl_func(pollset_t ps, struct poll_ctl *pollctl_array, int array_length); |
| typedef int pollset_poll_func(pollset_t ps, struct pollfd *polldata_array, int array_length, int timeout); |
| static pollset_create_func* _pollset_create = NULL; |
| static pollset_destroy_func* _pollset_destroy = NULL; |
| static pollset_ctl_func* _pollset_ctl = NULL; |
| static pollset_poll_func* _pollset_poll = NULL; |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_init(JNIEnv* env, jclass this) { |
| _pollset_create = (pollset_create_func*) dlsym(RTLD_DEFAULT, "pollset_create"); |
| _pollset_destroy = (pollset_destroy_func*) dlsym(RTLD_DEFAULT, "pollset_destroy"); |
| _pollset_ctl = (pollset_ctl_func*) dlsym(RTLD_DEFAULT, "pollset_ctl"); |
| _pollset_poll = (pollset_poll_func*) dlsym(RTLD_DEFAULT, "pollset_poll"); |
| if (_pollset_create == NULL || _pollset_destroy == NULL || |
| _pollset_ctl == NULL || _pollset_poll == NULL) { |
| JNU_ThrowInternalError(env, "unable to get address of pollset functions"); |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_eventSize(JNIEnv* env, jclass this) { |
| return sizeof(struct pollfd); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_eventsOffset(JNIEnv* env, jclass this) { |
| return offsetof(struct pollfd, events); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_reventsOffset(JNIEnv* env, jclass this) { |
| return offsetof(struct pollfd, revents); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_fdOffset(JNIEnv* env, jclass this) { |
| return offsetof(struct pollfd, fd); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_pollsetCreate(JNIEnv *env, jclass c) { |
| /* pollset_create can take the maximum number of fds, but we |
| * cannot predict this number so we leave it at OPEN_MAX. */ |
| pollset_t ps = _pollset_create(-1); |
| if (ps < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "pollset_create failed"); |
| } |
| return (int)ps; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_pollsetCtl(JNIEnv *env, jclass c, jint ps, |
| jint opcode, jint fd, jint events) { |
| struct poll_ctl event; |
| int res; |
| |
| event.cmd = opcode; |
| event.events = events; |
| event.fd = fd; |
| |
| RESTARTABLE(_pollset_ctl((pollset_t)ps, &event, 1 /* length */), res); |
| |
| return (res == 0) ? 0 : errno; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_AixPollPort_pollsetPoll(JNIEnv *env, jclass c, |
| jint ps, jlong address, jint numfds) { |
| struct pollfd *events = jlong_to_ptr(address); |
| int res; |
| |
| RESTARTABLE(_pollset_poll(ps, events, numfds, -1), res); |
| if (res < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "pollset_poll failed"); |
| } |
| return res; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_pollsetDestroy(JNIEnv *env, jclass c, jint ps) { |
| int res; |
| RESTARTABLE(_pollset_destroy((pollset_t)ps), res); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_socketpair(JNIEnv* env, jclass clazz, jintArray sv) { |
| int sp[2]; |
| if (socketpair(PF_UNIX, SOCK_STREAM, 0, sp) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "socketpair failed"); |
| } else { |
| jint res[2]; |
| res[0] = (jint)sp[0]; |
| res[1] = (jint)sp[1]; |
| (*env)->SetIntArrayRegion(env, sv, 0, 2, &res[0]); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_interrupt(JNIEnv *env, jclass c, jint fd) { |
| int res; |
| int buf[1]; |
| buf[0] = 1; |
| RESTARTABLE(write(fd, buf, 1), res); |
| if (res < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "write failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_drain1(JNIEnv *env, jclass cl, jint fd) { |
| int res; |
| char buf[1]; |
| RESTARTABLE(read(fd, buf, 1), res); |
| if (res < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "drain1 failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_AixPollPort_close0(JNIEnv *env, jclass c, jint fd) { |
| int res; |
| RESTARTABLE(close(fd), res); |
| } |