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/*
* Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <sys/types.h>
#include <string.h>
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "nio_util.h"
#include <nativehelper/JNIHelp.h>
#ifdef __linux__
#include <pthread.h>
#include <sys/signal.h>
// Android-changed: Bionic (and AsynchronousCloseMonitor) expects libcore to use
// __SIGRTMIN + 2, not __SIGRTMAX - 2
/* Also defined in net/linux_close.c */
#define INTERRUPT_SIGNAL (__SIGRTMIN + 2)
#elif __solaris__
#include <thread.h>
#include <signal.h>
#define INTERRUPT_SIGNAL (SIGRTMAX - 2)
#elif _ALLBSD_SOURCE
#include <pthread.h>
#include <signal.h>
/* Also defined in net/bsd_close.c */
#define INTERRUPT_SIGNAL SIGIO
// BEGIN Android-added: Fuchsia: Support for Fuchsia platform.
#elif __Fuchsia__
#include <pthread.h>
#include <signal.h>
/* Also defined in net/bsd_close.c */
#define INTERRUPT_SIGNAL SIGIO
// END Android-added: Fuchsia: Support for Fuchsia platform.
#else
#error "missing platform-specific definition here"
#endif
#define NATIVE_METHOD(className, functionName, signature) \
{ #functionName, signature, (void*)(className ## _ ## functionName) }
static void
nullHandler(int sig)
{
}
static void NativeThread_init(JNIEnv *env)
{
/* Install the null handler for INTERRUPT_SIGNAL. This might overwrite the
* handler previously installed by java/net/linux_close.c, but that's okay
* since neither handler actually does anything. We install our own
* handler here simply out of paranoia; ultimately the two mechanisms
* should somehow be unified, perhaps within the VM.
*/
sigset_t ss;
struct sigaction sa, osa;
sa.sa_handler = nullHandler;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
if (sigaction(INTERRUPT_SIGNAL, &sa, &osa) < 0)
JNU_ThrowIOExceptionWithLastError(env, "sigaction");
}
JNIEXPORT jlong JNICALL
NativeThread_current(JNIEnv *env, jclass cl)
{
#ifdef __solaris__
return (jlong)thr_self();
#else
return (jlong)pthread_self();
#endif
}
JNIEXPORT void JNICALL
NativeThread_signal(JNIEnv *env, jclass cl, jlong thread)
{
int ret;
#ifdef __solaris__
ret = thr_kill((thread_t)thread, INTERRUPT_SIGNAL);
#else
ret = pthread_kill((pthread_t)thread, INTERRUPT_SIGNAL);
#endif
if (ret != 0)
JNU_ThrowIOExceptionWithLastError(env, "Thread signal failed");
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(NativeThread, current, "()J"),
NATIVE_METHOD(NativeThread, signal, "(J)V"),
};
void register_sun_nio_ch_NativeThread(JNIEnv* env) {
jniRegisterNativeMethods(env, "sun/nio/ch/NativeThread", gMethods, NELEM(gMethods));
NativeThread_init(env);
}
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