1 /* 2 * Copyright (c) 2003, 2013, 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 */ 38 ssize_t handleWrite(FD fd, const void *buf, jint len); 39 ssize_t handleRead(FD fd, void *buf, jint len); 40 jint handleAvailable(FD fd, jlong *pbytes); 41 jint handleSetLength(FD fd, jlong length); 42 43 FD 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 76 #ifdef _ALLBSD_SOURCE 77 #define open64 open 78 #define fstat64 fstat 79 #define stat64 stat 80 #define lseek64 lseek 81 #define ftruncate64 ftruncate 82 #define IO_Lseek lseek 83 #else 84 #define IO_Lseek lseek64 85 #endif 86 87 /* 88 * On Solaris, the handle field is unused 89 */ 90 #define SET_HANDLE(fd) return (jlong)-1 91 92 /* 93 * Retry the operation if it is interrupted 94 */ 95 #define RESTARTABLE(_cmd, _result) do { \ 96 do { \ 97 _result = _cmd; \ 98 } while((_result == -1) && (errno == EINTR)); \ 99 } while(0) 100 101 /* 102 * IO helper function(s) 103 */ 104 void fileClose(JNIEnv *env, jobject this, jfieldID fid); 105 106 #ifdef MACOSX 107 jstring newStringPlatform(JNIEnv *env, const char* str); 108 #endif