/*
* Copyright ( c ) 2012 , 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 <strings.h>
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include "jni.h"
#include "jni_util.h"
#include "jlong.h"
#include "nio.h"
#include "nio_util.h"
#include "sun_nio_ch_KQueue.h"
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_keventSize(JNIEnv* env, jclass clazz)
{
return sizeof (struct kevent);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_identOffset(JNIEnv* env, jclass clazz)
{
return offsetof(struct kevent, ident);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_filterOffset(JNIEnv* env, jclass clazz)
{
return offsetof(struct kevent, filter);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_flagsOffset(JNIEnv* env, jclass clazz)
{
return offsetof(struct kevent, flags);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_create(JNIEnv *env, jclass clazz) {
int kqfd = kqueue();
if (kqfd < 0 ) {
JNU_ThrowIOExceptionWithLastError(env, "kqueue failed" );
return IOS_THROWN;
}
return kqfd;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_register(JNIEnv *env, jclass clazz, jint kqfd,
jint fd, jint filter, jint flags)
{
struct kevent changes[1 ];
int res;
EV_SET(&changes[0 ], fd, filter, flags, 0 , 0 , 0 );
RESTARTABLE(kevent(kqfd, &changes[0 ], 1 , NULL, 0 , NULL), res);
return (res == -1 ) ? errno : 0 ;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_KQueue_poll(JNIEnv *env, jclass clazz, jint kqfd, jlong address,
jint nevents, jlong timeout)
{
struct kevent *events = jlong_to_ptr(address);
int res;
struct timespec ts;
struct timespec *tsp;
if (timeout >= 0 ) {
ts.tv_sec = timeout / 1000 ;
ts.tv_nsec = (timeout % 1000 ) * 1000000 ;
tsp = &ts;
} else {
tsp = NULL;
}
res = kevent(kqfd, NULL, 0 , events, nevents, tsp);
if (res < 0 ) {
if (errno == EINTR) {
return IOS_INTERRUPTED;
} else {
JNU_ThrowIOExceptionWithLastError(env, "kqueue failed" );
return IOS_THROWN;
}
}
return res;
}
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