/*

 * 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

 * particular file as subject to the "Classpath" exception as provided

 *

 * 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.

 *

 */

#include <sys/types.h>

#include <string.h>

#include "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "jlong.h"

#include "sun_nio_ch_NativeThread.h"

#include "nio_util.h"

#ifdef __linux__

#include <pthread.h>

#include <sys/signal.h>

/* Also defined in src/solaris/native/java/net/linux_close.c */

#define INTERRUPT_SIGNAL (__SIGRTMAX - 2)

static void

nullHandler(int sig)

{

}

#endif

JNIEXPORT void JNICALL

Java_sun_nio_ch_NativeThread_init(JNIEnv *env, jclass cl)

{

#ifdef __linux__

    /* 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");

#endif

}

JNIEXPORT jlong JNICALL

Java_sun_nio_ch_NativeThread_current(JNIEnv *env, jclass cl)

{

#ifdef __linux__

    return (long)pthread_self();

#else

    return -1;

#endif

}

JNIEXPORT void JNICALL

Java_sun_nio_ch_NativeThread_signal(JNIEnv *env, jclass cl, jlong thread)

{

#ifdef __linux__

    if (pthread_kill((pthread_t)thread, INTERRUPT_SIGNAL))

        JNU_ThrowIOExceptionWithLastError(env, "Thread signal failed");

#endif

}