1/*
2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include "jni.h"
27#include "jni_util.h"
28#include "jvm.h"
29#include "jlong.h"
30#include "nio_util.h"
31
32#include "sun_nio_ch_KQueue.h"
33
34#include <strings.h>
35#include <sys/types.h>
36#include <sys/event.h>
37#include <sys/time.h>
38
39JNIEXPORT jint JNICALL
40Java_sun_nio_ch_KQueue_keventSize(JNIEnv* env, jclass this)
41{
42    return sizeof(struct kevent);
43}
44
45JNIEXPORT jint JNICALL
46Java_sun_nio_ch_KQueue_identOffset(JNIEnv* env, jclass this)
47{
48    return offsetof(struct kevent, ident);
49}
50
51JNIEXPORT jint JNICALL
52Java_sun_nio_ch_KQueue_filterOffset(JNIEnv* env, jclass this)
53{
54    return offsetof(struct kevent, filter);
55}
56
57JNIEXPORT jint JNICALL
58Java_sun_nio_ch_KQueue_flagsOffset(JNIEnv* env, jclass this)
59{
60    return offsetof(struct kevent, flags);
61}
62
63JNIEXPORT jint JNICALL
64Java_sun_nio_ch_KQueue_kqueue(JNIEnv *env, jclass c) {
65    int kqfd = kqueue();
66    if (kqfd < 0) {
67        JNU_ThrowIOExceptionWithLastError(env, "kqueue failed");
68    }
69    return kqfd;
70}
71
72JNIEXPORT jint JNICALL
73Java_sun_nio_ch_KQueue_keventRegister(JNIEnv *env, jclass c, jint kqfd,
74                                      jint fd, jint filter, jint flags)
75
76{
77    struct kevent changes[1];
78    struct timespec timeout = {0, 0};
79    int res;
80
81    EV_SET(&changes[0], fd, filter, flags, 0, 0, 0);
82    RESTARTABLE(kevent(kqfd, &changes[0], 1, NULL, 0, &timeout), res);
83    return (res == -1) ? errno : 0;
84}
85
86JNIEXPORT jint JNICALL
87Java_sun_nio_ch_KQueue_keventPoll(JNIEnv *env, jclass c,
88                                  jint kqfd, jlong address, jint nevents)
89{
90    struct kevent *events = jlong_to_ptr(address);
91    int res;
92
93    RESTARTABLE(kevent(kqfd, NULL, 0, events, nevents, NULL), res);
94    if (res < 0) {
95        JNU_ThrowIOExceptionWithLastError(env, "kqueue failed");
96    }
97    return res;
98}
99