Java example source code file (jvm_linux.h)

This example Java source code file (jvm_linux.h) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

agent_onunload_symbols, dir, f_ok, for, jni_onload, jni_onunload_symbols, jvm_md_h, jvm_o_wronly, maxpathlen, os_linux_vm_jvm_linux_h, r_ok, sigterm, w_ok, x_ok

The jvm_linux.h Java example source code

/*
 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef OS_LINUX_VM_JVM_LINUX_H
#define OS_LINUX_VM_JVM_LINUX_H

/*
// HotSpot integration note:
//
// This is derived from the JDK classic file:
// "$JDK/src/solaris/javavm/export/jvm_md.h":15 (ver. 1.10 98/04/22)
// All local includes have been commented out.
*/

#ifndef JVM_MD_H
#define JVM_MD_H

/*
 * This file is currently collecting system-specific dregs for the
 * JNI conversion, which should be sorted out later.
 */

#include <dirent.h>             /* For DIR */
#include <sys/param.h>          /* For MAXPATHLEN */
#include <sys/socket.h>         /* For socklen_t */
#include <unistd.h>             /* For F_OK, R_OK, W_OK */

#define JNI_ONLOAD_SYMBOLS      {"JNI_OnLoad"}
#define JNI_ONUNLOAD_SYMBOLS    {"JNI_OnUnload"}
#define JVM_ONLOAD_SYMBOLS      {"JVM_OnLoad"}
#define AGENT_ONLOAD_SYMBOLS    {"Agent_OnLoad"}
#define AGENT_ONUNLOAD_SYMBOLS  {"Agent_OnUnload"}
#define AGENT_ONATTACH_SYMBOLS  {"Agent_OnAttach"}

#define JNI_LIB_PREFIX "lib"
#define JNI_LIB_SUFFIX ".so"

// Hack: MAXPATHLEN is 4095 on some Linux and 4096 on others. This may
//       cause problems if JVM and the rest of JDK are built on different
//       Linux releases. Here we define JVM_MAXPATHLEN to be MAXPATHLEN + 1,
//       so buffers declared in VM are always >= 4096.
#define JVM_MAXPATHLEN MAXPATHLEN + 1

#define JVM_R_OK    R_OK
#define JVM_W_OK    W_OK
#define JVM_X_OK    X_OK
#define JVM_F_OK    F_OK

/*
 * File I/O
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>

/* O Flags */

#define JVM_O_RDONLY     O_RDONLY
#define JVM_O_WRONLY     O_WRONLY
#define JVM_O_RDWR       O_RDWR
#define JVM_O_O_APPEND   O_APPEND
#define JVM_O_EXCL       O_EXCL
#define JVM_O_CREAT      O_CREAT

/* Signal definitions */

#define BREAK_SIGNAL     SIGQUIT           /* Thread dumping support.    */
#define INTERRUPT_SIGNAL SIGUSR1           /* Interruptible I/O support. */
#define SHUTDOWN1_SIGNAL SIGHUP            /* Shutdown Hooks support.    */
#define SHUTDOWN2_SIGNAL SIGINT
#define SHUTDOWN3_SIGNAL SIGTERM

#endif /* JVM_MD_H */

#endif // OS_LINUX_VM_JVM_LINUX_H