1/* 2 * Copyright (c) 2002, 2006, 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 <sys/types.h> 27#include <string.h> 28#include "jni.h" 29#include "jni_util.h" 30#include "jvm.h" 31#include "jlong.h" 32#include "nio_util.h" 33#include "JNIHelp.h" 34 35#define NATIVE_METHOD(className, functionName, signature) \ 36{ #functionName, signature, (void*)(className ## _ ## functionName) } 37 38 39#include <pthread.h> 40#include <sys/signal.h> 41 42/* Also defined in src/solaris/native/java/net/linux_close.c */ 43#define INTERRUPT_SIGNAL (__SIGRTMAX - 2) 44 45static void 46nullHandler(int sig) 47{ 48} 49 50static void NativeThread_init(JNIEnv *env) 51{ 52 53 /* Install the null handler for INTERRUPT_SIGNAL. This might overwrite the 54 * handler previously installed by java/net/linux_close.c, but that's okay 55 * since neither handler actually does anything. We install our own 56 * handler here simply out of paranoia; ultimately the two mechanisms 57 * should somehow be unified, perhaps within the VM. 58 */ 59 60 sigset_t ss; 61 struct sigaction sa, osa; 62 sa.sa_handler = nullHandler; 63 sa.sa_flags = 0; 64 sigemptyset(&sa.sa_mask); 65 if (sigaction(INTERRUPT_SIGNAL, &sa, &osa) < 0) 66 JNU_ThrowIOExceptionWithLastError(env, "sigaction"); 67 68} 69 70JNIEXPORT jlong JNICALL 71NativeThread_current(JNIEnv *env, jclass cl) 72{ 73 return (long)pthread_self(); 74} 75 76JNIEXPORT void JNICALL 77NativeThread_signal(JNIEnv *env, jclass cl, jlong thread) 78{ 79 if (pthread_kill((pthread_t)thread, INTERRUPT_SIGNAL)) 80 JNU_ThrowIOExceptionWithLastError(env, "Thread signal failed"); 81} 82 83static JNINativeMethod gMethods[] = { 84 NATIVE_METHOD(NativeThread, current, "()J"), 85 NATIVE_METHOD(NativeThread, signal, "(J)V"), 86}; 87 88void register_sun_nio_ch_NativeThread(JNIEnv* env) { 89 jniRegisterNativeMethods(env, "sun/nio/ch/NativeThread", gMethods, NELEM(gMethods)); 90 NativeThread_init(env); 91} 92