io_util_md.h revision 0
325N/A/*
325N/A * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
325N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
325N/A *
325N/A * This code is free software; you can redistribute it and/or modify it
325N/A * under the terms of the GNU General Public License version 2 only, as
325N/A * published by the Free Software Foundation. Sun designates this
325N/A * particular file as subject to the "Classpath" exception as provided
325N/A * by Sun in the LICENSE file that accompanied this code.
325N/A *
325N/A * This code is distributed in the hope that it will be useful, but WITHOUT
325N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
325N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
325N/A * version 2 for more details (a copy is included in the LICENSE file that
325N/A * accompanied this code).
325N/A *
325N/A * You should have received a copy of the GNU General Public License version
325N/A * 2 along with this work; if not, write to the Free Software Foundation,
325N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
325N/A *
325N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
325N/A * CA 95054 USA or visit www.sun.com if you need additional information or
325N/A * have any questions.
325N/A */
325N/A
325N/A#include "jni.h"
325N/A#include "jni_util.h"
325N/A
325N/A/*
325N/A * Macros to use the right data type for file descriptors
325N/A */
325N/A#define FD jint
325N/A
325N/A/*
325N/A * Macros to set/get fd from the java.io.FileDescriptor. These
325N/A * macros rely on having an appropriately defined 'this' object
325N/A * within the scope in which they're used.
325N/A * If GetObjectField returns null, SET_FD will stop and GET_FD
325N/A * will simply return -1 to avoid crashing VM.
325N/A */
325N/A
325N/A#define SET_FD(this, fd, fid) \
325N/A if ((*env)->GetObjectField(env, (this), (fid)) != NULL) \
325N/A (*env)->SetIntField(env, (*env)->GetObjectField(env, (this), (fid)),IO_fd_fdID, (fd))
325N/A
325N/A#define GET_FD(this, fid) \
325N/A (*env)->GetObjectField(env, (this), (fid)) == NULL ? \
325N/A -1 : (*env)->GetIntField(env, (*env)->GetObjectField(env, (this), (fid)), IO_fd_fdID)
325N/A
325N/A/*
325N/A * Macros to set/get fd when inside java.io.FileDescriptor
325N/A */
325N/A#define THIS_FD(obj) (*env)->GetIntField(env, obj, IO_fd_fdID)
325N/A
325N/A/*
325N/A * Route the routines through HPI
325N/A */
325N/A#define IO_Write JVM_Write
325N/A#define IO_Sync JVM_Sync
325N/A#define IO_Read JVM_Read
325N/A#define IO_Lseek JVM_Lseek
325N/A#define IO_Available JVM_Available
325N/A#define IO_SetLength JVM_SetLength
325N/A
325N/A/*
325N/A * On Solaris, the handle field is unused
325N/A */
325N/A#define SET_HANDLE(fd) return (jlong)-1
325N/A
325N/A/*
325N/A * IO helper function(s)
325N/A */
325N/Avoid fileClose(JNIEnv *env, jobject this, jfieldID fid);
325N/A