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 #ifdef __linux__ 36 #include <pthread.h> 37 #include <sys/signal.h> 38 /* Also defined in net/linux_close.c */ 39 #define INTERRUPT_SIGNAL (__SIGRTMAX - 2) 40 #elif __solaris__ 41 #include <thread.h> 42 #include <signal.h> 43 #define INTERRUPT_SIGNAL (SIGRTMAX - 2) 44 #elif _ALLBSD_SOURCE 45 #include <pthread.h> 46 #include <signal.h> 47 /* Also defined in net/bsd_close.c */ 48 #define INTERRUPT_SIGNAL SIGIO 49 #else 50 #error "missing platform-specific definition here" 51 #endif 52 53 #define NATIVE_METHOD(className, functionName, signature) \ 54 { #functionName, signature, (void*)(className ## _ ## functionName) } 55 56 static void 57 nullHandler(int sig) 58 { 59 } 60 61 static void NativeThread_init(JNIEnv *env) 62 { 63 /* Install the null handler for INTERRUPT_SIGNAL. This might overwrite the 64 * handler previously installed by java/net/linux_close.c, but that's okay 65 * since neither handler actually does anything. We install our own 66 * handler here simply out of paranoia; ultimately the two mechanisms 67 * should somehow be unified, perhaps within the VM. 68 */ 69 70 sigset_t ss; 71 struct sigaction sa, osa; 72 sa.sa_handler = nullHandler; 73 sa.sa_flags = 0; 74 sigemptyset(&sa.sa_mask); 75 if (sigaction(INTERRUPT_SIGNAL, &sa, &osa) < 0) 76 JNU_ThrowIOExceptionWithLastError(env, "sigaction"); 77 } 78 79 JNIEXPORT jlong JNICALL 80 NativeThread_current(JNIEnv *env, jclass cl) 81 { 82 #ifdef __solaris__ 83 return (jlong)thr_self(); 84 #else 85 return (jlong)pthread_self(); 86 #endif 87 } 88 89 JNIEXPORT void JNICALL 90 NativeThread_signal(JNIEnv *env, jclass cl, jlong thread) 91 { 92 int ret; 93 #ifdef __solaris__ 94 ret = thr_kill((thread_t)thread, INTERRUPT_SIGNAL); 95 #else 96 ret = pthread_kill((pthread_t)thread, INTERRUPT_SIGNAL); 97 #endif 98 if (ret != 0) 99 JNU_ThrowIOExceptionWithLastError(env, "Thread signal failed"); 100 } 101 102 static JNINativeMethod gMethods[] = { 103 NATIVE_METHOD(NativeThread, current, "()J"), 104 NATIVE_METHOD(NativeThread, signal, "(J)V"), 105 }; 106 107 void register_sun_nio_ch_NativeThread(JNIEnv* env) { 108 jniRegisterNativeMethods(env, "sun/nio/ch/NativeThread", gMethods, NELEM(gMethods)); 109 NativeThread_init(env); 110 } 111
