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 */ 40 jfieldID IO_fd_fdID; 41 42 /* field id for jlong 'handle' in java.io.FileDescriptor */ 43 jfieldID IO_handle_fdID; 44 45 /************************************************************** 46 * static methods to store field IDs in initializers 47 */ 48 49 JNIEXPORT void JNICALL 50 Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) { 51 CHECK_NULL(IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I")); 52 CHECK_NULL(IO_handle_fdID = (*env)->GetFieldID(env, fdClass, "handle", "J")); 53 } 54 55 JNIEXPORT jlong JNICALL 56 Java_java_io_FileDescriptor_set(JNIEnv *env, jclass fdClass, jint fd) { 57 SET_HANDLE(fd); 58 } 59 60 /************************************************************** 61 * File Descriptor 62 */ 63 64 JNIEXPORT void JNICALL 65 Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) { 66 FD fd = THIS_FD(this); 67 if (IO_Sync(fd) == -1) { 68 JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed"); 69 } 70 }