1 /*
 2  * Copyright (c) 2019, 2022, 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 #include <winsock2.h>
26 
27 #include "jni.h"
28 #include "jni_util.h"
29 #include "jlong.h"
30 #include "nio.h"
31 #include "sun_nio_ch_WSAPoll.h"
32 
33 JNIEXPORT jint JNICALL
34 Java_sun_nio_ch_WSAPoll_pollfdSize(JNIEnv* env, jclass clazz)
35 {
36     return sizeof(struct pollfd);
37 }
38 
39 JNIEXPORT jint JNICALL
40 Java_sun_nio_ch_WSAPoll_fdOffset(JNIEnv* env, jclass clazz)
41 {
42     return offsetof(struct pollfd, fd);
43 }
44 
45 JNIEXPORT jint JNICALL
46 Java_sun_nio_ch_WSAPoll_eventsOffset(JNIEnv* env, jclass clazz)
47 {
48     return offsetof(struct pollfd, events);
49 }
50 
51 JNIEXPORT jint JNICALL
52 Java_sun_nio_ch_WSAPoll_reventsOffset(JNIEnv* env, jclass clazz)
53 {
54     return offsetof(struct pollfd, revents);
55 }
56 
57 JNIEXPORT jint JNICALL
58 Java_sun_nio_ch_WSAPoll_poll(JNIEnv *env, jclass clazz,
59                              jlong address, jint numfds, jint timeout)
60 {
61     LPWSAPOLLFD a = (LPWSAPOLLFD) jlong_to_ptr(address);
62     int res = WSAPoll(a, numfds, timeout);
63     if (res == SOCKET_ERROR) {
64         JNU_ThrowIOExceptionWithLastError(env, "WSAPoll failed");
65         return IOS_THROWN;
66     }
67     return (jint) res;
68 }