/*
* Copyright (c) 2001, 2018, Oracle and/or its affiliates. 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 <sys/devpoll.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <poll.h>
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "nio.h"
#include "nio_util.h"
#include "sun_nio_ch_DevPollArrayWrapper.h"
JNIEXPORT jint JNICALL
Java_sun_nio_ch_DevPollArrayWrapper_init(JNIEnv *env, jobject this)
{
int wfd = open("/dev/poll", O_RDWR);
if (wfd < 0) {
JNU_ThrowIOExceptionWithLastError(env, "Error opening driver");
return -1;
}
return wfd;
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_DevPollArrayWrapper_register(JNIEnv *env, jobject this,
jint wfd, jint fd, jint mask)
{
struct pollfd a[1];
int n;
a[0].fd = fd;
a[0].events = mask;
a[0].revents = 0;
n = write(wfd, &a[0], sizeof(a));
if (n != sizeof(a)) {
if (n < 0) {
JNU_ThrowIOExceptionWithLastError(env, "Error writing pollfds");
} else {
JNU_ThrowIOException(env, "Unexpected number of bytes written");
}
}
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_DevPollArrayWrapper_registerMultiple(JNIEnv *env, jobject this,
jint wfd, jlong address,
jint len)
{
unsigned char *pollBytes = (unsigned char *)jlong_to_ptr(address);
unsigned char *pollEnd = pollBytes + sizeof(struct pollfd) * len;
while (pollBytes < pollEnd) {
int bytesWritten = write(wfd, pollBytes, (int)(pollEnd - pollBytes));
if (bytesWritten < 0) {
JNU_ThrowIOExceptionWithLastError(env, "Error writing pollfds");
return;
}
pollBytes += bytesWritten;
}
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_DevPollArrayWrapper_poll0(JNIEnv *env, jobject this,
jlong address, jint numfds,
jlong timeout, jint wfd)
{
struct dvpoll a;
void *pfd = (void *) jlong_to_ptr(address);
int result;
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