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