1/*
2 * Copyright (c) 2003, 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 "jni.h"
27#include "jni_util.h"
28#include "jvm.h"
29#include "io_util.h"
30#include "jlong.h"
31#include "io_util_md.h"
32
33#include "java_io_FileDescriptor.h"
34
35/*******************************************************************/
36/*  BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/
37/*******************************************************************/
38
39/* field id for jint 'fd' in java.io.FileDescriptor */
40jfieldID IO_fd_fdID;
41
42/* field id for jlong 'handle' in java.io.FileDescriptor */
43jfieldID IO_handle_fdID;
44
45/* field id for jboolean 'append' in java.io.FileDescriptor */
46jfieldID IO_append_fdID;
47
48/**************************************************************
49 * static methods to store field IDs in initializers
50 */
51
52JNIEXPORT void JNICALL
53Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) {
54    CHECK_NULL(IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I"));
55    CHECK_NULL(IO_handle_fdID = (*env)->GetFieldID(env, fdClass, "handle", "J"));
56    CHECK_NULL(IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z"));
57}
58
59JNIEXPORT jlong JNICALL
60Java_java_io_FileDescriptor_set(JNIEnv *env, jclass fdClass, jint fd) {
61    SET_HANDLE(fd);
62}
63
64/**************************************************************
65 * File Descriptor
66 */
67
68JNIEXPORT void JNICALL
69Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) {
70    FD fd = THIS_FD(this);
71    if (IO_Sync(fd) == -1) {
72        JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed");
73    }
74}
75