jdk
1/*
2* Copyright (c) 2003, 2023, 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 JNICALL53Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) {54CHECK_NULL(IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I"));55CHECK_NULL(IO_handle_fdID = (*env)->GetFieldID(env, fdClass, "handle", "J"));56CHECK_NULL(IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z"));57}
58
59/**************************************************************
60* File Descriptor
61*/
62
63JNIEXPORT void JNICALL64Java_java_io_FileDescriptor_sync0(JNIEnv *env, jobject this) {65FD fd = THIS_FD(this);66if (IO_Sync(fd) == -1) {67JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed");68}69}
70
71JNIEXPORT jlong JNICALL
72Java_java_io_FileDescriptor_getHandle(JNIEnv *env, jclass fdClass, jint fd) {73SET_HANDLE(fd);74}
75
76JNIEXPORT jboolean JNICALL
77Java_java_io_FileDescriptor_getAppend(JNIEnv *env, jclass fdClass, jint fd) {78return JNI_FALSE;79}
80
81// instance method close0 for FileDescriptor
82JNIEXPORT void JNICALL83Java_java_io_FileDescriptor_close0(JNIEnv *env, jobject this) {84fileDescriptorClose(env, this);85}
86
87JNIEXPORT void JNICALL88Java_java_io_FileCleanable_cleanupClose0(JNIEnv *env, jclass fdClass, jint unused, jlong handle) {89if (handle != -1) {90if (!CloseHandle((HANDLE)handle)) {91JNU_ThrowIOExceptionWithLastError(env, "close failed");92}93}94}
95