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xieyinlu
2024-11-30 19:03:49 +08:00
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java/org/apache/tomcat/jni/Library.java Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.jni;
import java.io.File;
/** Library
*
* @author Mladen Turk
*/
public final class Library {
/* Default library names */
private static final String [] NAMES = {"tcnative-1", "libtcnative-1"};
/*
* A handle to the unique Library singleton instance.
*/
private static Library _instance = null;
private Library() throws Exception {
boolean loaded = false;
String path = System.getProperty("java.library.path");
String [] paths = path.split(File.pathSeparator);
StringBuilder err = new StringBuilder();
for (int i = 0; i < NAMES.length; i++) {
try {
System.loadLibrary(NAMES[i]);
loaded = true;
} catch (ThreadDeath t) {
throw t;
} catch (VirtualMachineError t) {
// Don't use a Java 7 multiple exception catch so we can keep
// the JNI code identical between Tomcat 6/7/8/9
throw t;
} catch (Throwable t) {
String name = System.mapLibraryName(NAMES[i]);
for (int j = 0; j < paths.length; j++) {
java.io.File fd = new java.io.File(paths[j] , name);
if (fd.exists()) {
// File exists but failed to load
throw t;
}
}
if (i > 0) {
err.append(", ");
}
err.append(t.getMessage());
}
if (loaded) {
break;
}
}
if (!loaded) {
StringBuilder names = new StringBuilder();
for (String name : NAMES) {
names.append(name);
names.append(", ");
}
throw new LibraryNotFoundError(names.substring(0, names.length() -2), err.toString());
}
}
private Library(String libraryName)
{
System.loadLibrary(libraryName);
}
/* create global TCN's APR pool
* This has to be the first call to TCN library.
*/
private static native boolean initialize();
/* destroy global TCN's APR pool
* This has to be the last call to TCN library.
*/
public static native void terminate();
/* Internal function for loading APR Features */
private static native boolean has(int what);
/* Internal function for loading APR Features */
private static native int version(int what);
/* Internal function for loading APR sizes */
private static native int size(int what);
/* TCN_MAJOR_VERSION */
public static int TCN_MAJOR_VERSION = 0;
/* TCN_MINOR_VERSION */
public static int TCN_MINOR_VERSION = 0;
/* TCN_PATCH_VERSION */
public static int TCN_PATCH_VERSION = 0;
/* TCN_IS_DEV_VERSION */
public static int TCN_IS_DEV_VERSION = 0;
/* APR_MAJOR_VERSION */
public static int APR_MAJOR_VERSION = 0;
/* APR_MINOR_VERSION */
public static int APR_MINOR_VERSION = 0;
/* APR_PATCH_VERSION */
public static int APR_PATCH_VERSION = 0;
/* APR_IS_DEV_VERSION */
public static int APR_IS_DEV_VERSION = 0;
/* TCN_VERSION_STRING */
public static native String versionString();
/* APR_VERSION_STRING */
public static native String aprVersionString();
/* APR Feature Macros */
public static boolean APR_HAVE_IPV6 = false;
public static boolean APR_HAS_SHARED_MEMORY = false;
public static boolean APR_HAS_THREADS = false;
public static boolean APR_HAS_SENDFILE = false;
public static boolean APR_HAS_MMAP = false;
public static boolean APR_HAS_FORK = false;
public static boolean APR_HAS_RANDOM = false;
public static boolean APR_HAS_OTHER_CHILD = false;
public static boolean APR_HAS_DSO = false;
public static boolean APR_HAS_SO_ACCEPTFILTER = false;
public static boolean APR_HAS_UNICODE_FS = false;
public static boolean APR_HAS_PROC_INVOKED = false;
public static boolean APR_HAS_USER = false;
public static boolean APR_HAS_LARGE_FILES = false;
public static boolean APR_HAS_XTHREAD_FILES = false;
public static boolean APR_HAS_OS_UUID = false;
/* Are we big endian? */
public static boolean APR_IS_BIGENDIAN = false;
/* APR sets APR_FILES_AS_SOCKETS to 1 on systems where it is possible
* to poll on files/pipes.
*/
public static boolean APR_FILES_AS_SOCKETS = false;
/* This macro indicates whether or not EBCDIC is the native character set.
*/
public static boolean APR_CHARSET_EBCDIC = false;
/* Is the TCP_NODELAY socket option inherited from listening sockets?
*/
public static boolean APR_TCP_NODELAY_INHERITED = false;
/* Is the O_NONBLOCK flag inherited from listening sockets?
*/
public static boolean APR_O_NONBLOCK_INHERITED = false;
public static int APR_SIZEOF_VOIDP;
public static int APR_PATH_MAX;
public static int APRMAXHOSTLEN;
public static int APR_MAX_IOVEC_SIZE;
public static int APR_MAX_SECS_TO_LINGER;
public static int APR_MMAP_THRESHOLD;
public static int APR_MMAP_LIMIT;
/* return global TCN's APR pool */
public static native long globalPool();
/**
* Setup any APR internal data structures. This MUST be the first function
* called for any APR library.
* @param libraryName the name of the library to load
*
* @return {@code true} if the native code was initialized successfully
* otherwise {@code false}
*
* @throws Exception if a problem occurred during initialization
*/
public static synchronized boolean initialize(String libraryName) throws Exception {
if (_instance == null) {
if (libraryName == null)
_instance = new Library();
else
_instance = new Library(libraryName);
TCN_MAJOR_VERSION = version(0x01);
TCN_MINOR_VERSION = version(0x02);
TCN_PATCH_VERSION = version(0x03);
TCN_IS_DEV_VERSION = version(0x04);
APR_MAJOR_VERSION = version(0x11);
APR_MINOR_VERSION = version(0x12);
APR_PATCH_VERSION = version(0x13);
APR_IS_DEV_VERSION = version(0x14);
APR_SIZEOF_VOIDP = size(1);
APR_PATH_MAX = size(2);
APRMAXHOSTLEN = size(3);
APR_MAX_IOVEC_SIZE = size(4);
APR_MAX_SECS_TO_LINGER = size(5);
APR_MMAP_THRESHOLD = size(6);
APR_MMAP_LIMIT = size(7);
APR_HAVE_IPV6 = has(0);
APR_HAS_SHARED_MEMORY = has(1);
APR_HAS_THREADS = has(2);
APR_HAS_SENDFILE = has(3);
APR_HAS_MMAP = has(4);
APR_HAS_FORK = has(5);
APR_HAS_RANDOM = has(6);
APR_HAS_OTHER_CHILD = has(7);
APR_HAS_DSO = has(8);
APR_HAS_SO_ACCEPTFILTER = has(9);
APR_HAS_UNICODE_FS = has(10);
APR_HAS_PROC_INVOKED = has(11);
APR_HAS_USER = has(12);
APR_HAS_LARGE_FILES = has(13);
APR_HAS_XTHREAD_FILES = has(14);
APR_HAS_OS_UUID = has(15);
APR_IS_BIGENDIAN = has(16);
APR_FILES_AS_SOCKETS = has(17);
APR_CHARSET_EBCDIC = has(18);
APR_TCP_NODELAY_INHERITED = has(19);
APR_O_NONBLOCK_INHERITED = has(20);
if (APR_MAJOR_VERSION < 1) {
throw new UnsatisfiedLinkError("Unsupported APR Version (" +
aprVersionString() + ")");
}
if (!APR_HAS_THREADS) {
throw new UnsatisfiedLinkError("Missing APR_HAS_THREADS");
}
}
return initialize();
}
/**
* Calls System.load(filename). System.load() associates the
* loaded library with the class loader of the class that called
* the System method. A native library may not be loaded by more
* than one class loader, so calling the System method from a class that
* was loaded by a Webapp class loader will make it impossible for
* other Webapps to load it.
*
* Using this method will load the native library via a shared class
* loader (typically the Common class loader, but may vary in some
* configurations), so that it can be loaded by multiple Webapps.
*
* @param filename - absolute path of the native library
*/
public static void load(String filename){
System.load(filename);
}
/**
* Calls System.loadLibrary(libname). System.loadLibrary() associates the
* loaded library with the class loader of the class that called
* the System method. A native library may not be loaded by more
* than one class loader, so calling the System method from a class that
* was loaded by a Webapp class loader will make it impossible for
* other Webapps to load it.
*
* Using this method will load the native library via a shared class
* loader (typically the Common class loader, but may vary in some
* configurations), so that it can be loaded by multiple Webapps.
*
* @param libname - the name of the native library
*/
public static void loadLibrary(String libname){
System.loadLibrary(libname);
}
}