/*

 * Copyright (c) 2012, 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 "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "jlong.h"

#include "nio_util.h"

#include "sun_nio_ch_KQueue.h"

#include <strings.h>

#include <sys/types.h>

#include <sys/event.h>

#include <sys/time.h>

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_keventSize(JNIEnv* env, jclass this)

{

    return sizeof(struct kevent);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_identOffset(JNIEnv* env, jclass this)

{

    return offsetof(struct kevent, ident);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_filterOffset(JNIEnv* env, jclass this)

{

    return offsetof(struct kevent, filter);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_flagsOffset(JNIEnv* env, jclass this)

{

    return offsetof(struct kevent, flags);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_kqueue(JNIEnv *env, jclass c) {

    int kqfd = kqueue();

    if (kqfd < 0) {

        JNU_ThrowIOExceptionWithLastError(env, "kqueue failed");

    }

    return kqfd;

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_keventRegister(JNIEnv *env, jclass c, jint kqfd,

                                      jint fd, jint filter, jint flags)

{

    struct kevent changes[1];

    struct timespec timeout = {0, 0};

    int res;

    EV_SET(&changes[0], fd, filter, flags, 0, 0, 0);

    RESTARTABLE(kevent(kqfd, &changes[0], 1, NULL, 0, &timeout), res);

    return (res == -1) ? errno : 0;

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_KQueue_keventPoll(JNIEnv *env, jclass c,

                                  jint kqfd, jlong address, jint nevents)

{

    struct kevent *events = jlong_to_ptr(address);

    int res;

    RESTARTABLE(kevent(kqfd, NULL, 0, events, nevents, NULL), res);

    if (res < 0) {

        JNU_ThrowIOExceptionWithLastError(env, "kqueue failed");

    }

    return res;

}