1/*
2 * Copyright (c) 2003, 2019, 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_util.h"
27
28/*
29 * Macros to use the right data type for file descriptors
30 */
31#define FD jint
32
33/*
34 * Prototypes for functions in io_util_md.c called from io_util.c,
35 * FileDescriptor.c, FileInputStream.c, FileOutputStream.c,
36 * UnixFileSystem_md.c
37 */
38ssize_t handleWrite(FD fd, const void *buf, jint len);
39ssize_t handleRead(FD fd, void *buf, jint len);
40jint handleAvailable(FD fd, jlong *pbytes);
41jint handleSetLength(FD fd, jlong length);
42jlong handleGetLength(FD fd);
43FD handleOpen(const char *path, int oflag, int mode);
44
45/*
46 * Macros to set/get fd from the java.io.FileDescriptor. These
47 * macros rely on having an appropriately defined 'this' object
48 * within the scope in which they're used.
49 * If GetObjectField returns null, SET_FD will stop and GET_FD
50 * will simply return -1 to avoid crashing VM.
51 */
52
53#define SET_FD(this, fd, fid) \
54 if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
55 (*env)->SetIntField(env, (*env)->GetObjectField(env, (this), (fid)),IO_fd_fdID, (fd))
56
57#define GET_FD(this, fid) \
58 (*env)->GetObjectField(env, (this), (fid)) == NULL ? \
59 -1 : (*env)->GetIntField(env, (*env)->GetObjectField(env, (this), (fid)), IO_fd_fdID)
60
61/*
62 * Macros to set/get fd when inside java.io.FileDescriptor
63 */
64#define THIS_FD(obj) (*env)->GetIntField(env, obj, IO_fd_fdID)
65
66/*
67 * Route the routines
68 */
69#define IO_Sync fsync
70#define IO_Read handleRead
71#define IO_Write handleWrite
72#define IO_Append handleWrite
73#define IO_Available handleAvailable
74#define IO_SetLength handleSetLength
75#define IO_GetLength handleGetLength
76
77#ifdef _ALLBSD_SOURCE
78#define open64 open
79#define fstat64 fstat
80#define stat64 stat
81#define lseek64 lseek
82#define ftruncate64 ftruncate
83#define IO_Lseek lseek
84#else
85#define IO_Lseek lseek64
86#endif
87
88/*
89 * On Solaris, the handle field is unused
90 */
91#define SET_HANDLE(fd) return (jlong)-1
92
93/*
94 * Retry the operation if it is interrupted
95 */
96#define RESTARTABLE(_cmd, _result) \
97 do { \
98 _result = _cmd; \
99 } while ((_result == -1) && (errno == EINTR))
100
101void fileDescriptorClose(JNIEnv *env, jobject this);
102
103#ifdef MACOSX
104jstring newStringPlatform(JNIEnv *env, const char* str);
105#endif
106