1 /* 2 * Copyright (c) 2003, 2010, 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 29 /* 30 * Macros to use the right data type for file descriptors 31 */ 32 #define FD jint 33 34 /* 35 * Prototypes for functions in io_util_md.c called from io_util.c, 36 * FileDescriptor.c, FileInputStream.c, FileOutputStream.c, 37 * UnixFileSystem_md.c 38 */ 39 FD handleOpen(const char *path, int oflag, int mode); 40 41 /* 42 * Macros to set/get fd from the java.io.FileDescriptor. These 43 * macros rely on having an appropriately defined 'this' object 44 * within the scope in which they're used. 45 * If GetObjectField returns null, SET_FD will stop and GET_FD 46 * will simply return -1 to avoid crashing VM. 47 */ 48 49 #define SET_FD(this, fd, fid) \ 50 if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \ 51 (*env)->SetIntField(env, (*env)->GetObjectField(env, (this), (fid)),IO_fd_fdID, (fd)) 52 53 #define GET_FD(this, fid) \ 54 (*env)->GetObjectField(env, (this), (fid)) == NULL ? \ 55 -1 : (*env)->GetIntField(env, (*env)->GetObjectField(env, (this), (fid)), IO_fd_fdID) 56 57 /* 58 * Macros to set/get fd when inside java.io.FileDescriptor 59 */ 60 #define THIS_FD(obj) (*env)->GetIntField(env, obj, IO_fd_fdID) 61 62 /* 63 * Route the routines through VM 64 */ 65 #define IO_Append JVM_Write 66 #define IO_Write JVM_Write 67 #define IO_Sync JVM_Sync 68 #define IO_Read JVM_Read 69 #define IO_Lseek JVM_Lseek 70 #define IO_SetLength JVM_SetLength 71 72 /* 73 * On Solaris, the handle field is unused 74 */ 75 #define SET_HANDLE(fd) return (jlong)-1 76 77 /* 78 * Retry the operation if it is interrupted 79 */ 80 #define RESTARTABLE(_cmd, _result) do { \ 81 do { \ 82 _result = _cmd; \ 83 } while((_result == -1) && (errno == EINTR)); \ 84 } while(0) 85 86 /* 87 * IO helper function(s) 88 */ 89 void fileClose(JNIEnv *env, jobject this, jfieldID fid); 90 91 #ifdef MACOSX 92 jstring newStringPlatform(JNIEnv *env, const char* str); 93 #endif 94