/*

 * Copyright (c) 1997, 2017, 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 <unistd.h>

#include <fcntl.h>

#include "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "io_util_md.h"

#include "java_io_FileDescriptor.h"

/*******************************************************************/

/*  BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/

/*******************************************************************/

/* field id for jint 'fd' in java.io.FileDescriptor */

jfieldID IO_fd_fdID;

/* field id for jboolean 'append' in java.io.FileDescriptor */

jfieldID IO_append_fdID;

/**************************************************************

 * static methods to store field ID's in initializers

 */

JNIEXPORT void JNICALL

Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) {

    CHECK_NULL(IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I"));

    CHECK_NULL(IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z"));

}

/**************************************************************

 * File Descriptor

 */

JNIEXPORT void JNICALL

Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) {

    FD fd = THIS_FD(this);

    if (IO_Sync(fd) == -1) {

        JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed");

    }

}

JNIEXPORT jboolean JNICALL

Java_java_io_FileDescriptor_getAppend(JNIEnv *env, jclass fdClass, jint fd) {

    int flags = fcntl(fd, F_GETFL);

    return ((flags & O_APPEND) == 0) ? JNI_FALSE : JNI_TRUE;

}

// instance method close0 for FileDescriptor

JNIEXPORT void JNICALL

    fileDescriptorClose(env, this);

}