1 /*

     2  * Copyright (c) 2001, 2018, 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 <poll.h>

    27 

    28 #include "jni.h"

    29 #include "jni_util.h"

    30 #include "jvm.h"

    31 #include "jlong.h"

    32 #include "nio.h"

    33 #include "sun_nio_ch_PollSelectorImpl.h"

    34 

    35 JNIEXPORT jint JNICALL

    36 Java_sun_nio_ch_PollSelectorImpl_poll(JNIEnv *env, jclass clazz,

    37                                       jlong address, jint numfds,

    38                                       jint timeout)

    39 {

    40     struct pollfd *a;

    41     int res;

    42 

    43     a = (struct pollfd *) jlong_to_ptr(address);

    44     res = poll(a, numfds, timeout);

    45     if (res < 0) {

    46         if (errno == EINTR) {

    47             return IOS_INTERRUPTED;

    48         } else {

    49             JNU_ThrowIOExceptionWithLastError(env, "poll failed");

    50             return IOS_THROWN;

    51         }

    52     }

    53     return (jint) res;

    54 }

    55