Source Code Cross Referenced for Library.java in  » Sevlet-Container » apache-tomcat-6.0.14 » org » apache » tomcat » jni » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.tomcat.jni 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         */
017:
018:        package org.apache.tomcat.jni;
019:
020:        /** Library
021:         *
022:         * @author Mladen Turk
023:         * @version $Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
024:         */
025:
026:        public final class Library {
027:
028:            /* Default library names */
029:            private static String[] NAMES = { "tcnative-1", "libtcnative-1" };
030:            /*
031:             * A handle to the unique Library singleton instance.
032:             */
033:            static private Library _instance = null;
034:
035:            private Library() {
036:                boolean loaded = false;
037:                String err = "";
038:                for (int i = 0; i < NAMES.length; i++) {
039:                    try {
040:                        System.loadLibrary(NAMES[i]);
041:                        loaded = true;
042:                    } catch (Throwable e) {
043:                        if (i > 0)
044:                            err += ", ";
045:                        err += e.getMessage();
046:                    }
047:                    if (loaded)
048:                        break;
049:                }
050:                if (!loaded) {
051:                    err += "(";
052:                    err += System.getProperty("java.library.path");
053:                    err += ")";
054:                    throw new UnsatisfiedLinkError(err);
055:                }
056:            }
057:
058:            private Library(String libraryName) {
059:                System.loadLibrary(libraryName);
060:            }
061:
062:            /* create global TCN's APR pool
063:             * This has to be the first call to TCN library.
064:             */
065:            private static native boolean initialize();
066:
067:            /* destroy global TCN's APR pool
068:             * This has to be the last call to TCN library.
069:             */
070:            public static native void terminate();
071:
072:            /* Internal function for loading APR Features */
073:            private static native boolean has(int what);
074:
075:            /* Internal function for loading APR Features */
076:            private static native int version(int what);
077:
078:            /* Internal function for loading APR sizes */
079:            private static native int size(int what);
080:
081:            /* TCN_MAJOR_VERSION */
082:            public static int TCN_MAJOR_VERSION = 0;
083:            /* TCN_MINOR_VERSION */
084:            public static int TCN_MINOR_VERSION = 0;
085:            /* TCN_PATCH_VERSION */
086:            public static int TCN_PATCH_VERSION = 0;
087:            /* TCN_IS_DEV_VERSION */
088:            public static int TCN_IS_DEV_VERSION = 0;
089:            /* APR_MAJOR_VERSION */
090:            public static int APR_MAJOR_VERSION = 0;
091:            /* APR_MINOR_VERSION */
092:            public static int APR_MINOR_VERSION = 0;
093:            /* APR_PATCH_VERSION */
094:            public static int APR_PATCH_VERSION = 0;
095:            /* APR_IS_DEV_VERSION */
096:            public static int APR_IS_DEV_VERSION = 0;
097:
098:            /* TCN_VERSION_STRING */
099:            public static native String versionString();
100:
101:            /* APR_VERSION_STRING */
102:            public static native String aprVersionString();
103:
104:            /*  APR Feature Macros */
105:            public static boolean APR_HAVE_IPV6 = false;
106:            public static boolean APR_HAS_SHARED_MEMORY = false;
107:            public static boolean APR_HAS_THREADS = false;
108:            public static boolean APR_HAS_SENDFILE = false;
109:            public static boolean APR_HAS_MMAP = false;
110:            public static boolean APR_HAS_FORK = false;
111:            public static boolean APR_HAS_RANDOM = false;
112:            public static boolean APR_HAS_OTHER_CHILD = false;
113:            public static boolean APR_HAS_DSO = false;
114:            public static boolean APR_HAS_SO_ACCEPTFILTER = false;
115:            public static boolean APR_HAS_UNICODE_FS = false;
116:            public static boolean APR_HAS_PROC_INVOKED = false;
117:            public static boolean APR_HAS_USER = false;
118:            public static boolean APR_HAS_LARGE_FILES = false;
119:            public static boolean APR_HAS_XTHREAD_FILES = false;
120:            public static boolean APR_HAS_OS_UUID = false;
121:            /* Are we big endian? */
122:            public static boolean APR_IS_BIGENDIAN = false;
123:            /* APR sets APR_FILES_AS_SOCKETS to 1 on systems where it is possible
124:             * to poll on files/pipes.
125:             */
126:            public static boolean APR_FILES_AS_SOCKETS = false;
127:            /* This macro indicates whether or not EBCDIC is the native character set.
128:             */
129:            public static boolean APR_CHARSET_EBCDIC = false;
130:            /* Is the TCP_NODELAY socket option inherited from listening sockets?
131:             */
132:            public static boolean APR_TCP_NODELAY_INHERITED = false;
133:            /* Is the O_NONBLOCK flag inherited from listening sockets?
134:             */
135:            public static boolean APR_O_NONBLOCK_INHERITED = false;
136:
137:            public static int APR_SIZEOF_VOIDP;
138:            public static int APR_PATH_MAX;
139:            public static int APRMAXHOSTLEN;
140:            public static int APR_MAX_IOVEC_SIZE;
141:            public static int APR_MAX_SECS_TO_LINGER;
142:            public static int APR_MMAP_THRESHOLD;
143:            public static int APR_MMAP_LIMIT;
144:
145:            /* return global TCN's APR pool */
146:            public static native long globalPool();
147:
148:            /**
149:             * Setup any APR internal data structures.  This MUST be the first function
150:             * called for any APR library.
151:             * @param libraryName the name of the library to load
152:             */
153:            static public boolean initialize(String libraryName)
154:                    throws Exception {
155:                if (_instance == null) {
156:                    if (libraryName == null)
157:                        _instance = new Library();
158:                    else
159:                        _instance = new Library(libraryName);
160:                    TCN_MAJOR_VERSION = version(0x01);
161:                    TCN_MINOR_VERSION = version(0x02);
162:                    TCN_PATCH_VERSION = version(0x03);
163:                    TCN_IS_DEV_VERSION = version(0x04);
164:                    APR_MAJOR_VERSION = version(0x11);
165:                    APR_MINOR_VERSION = version(0x12);
166:                    APR_PATCH_VERSION = version(0x13);
167:                    APR_IS_DEV_VERSION = version(0x14);
168:
169:                    APR_SIZEOF_VOIDP = size(1);
170:                    APR_PATH_MAX = size(2);
171:                    APRMAXHOSTLEN = size(3);
172:                    APR_MAX_IOVEC_SIZE = size(4);
173:                    APR_MAX_SECS_TO_LINGER = size(5);
174:                    APR_MMAP_THRESHOLD = size(6);
175:                    APR_MMAP_LIMIT = size(7);
176:
177:                    APR_HAVE_IPV6 = has(0);
178:                    APR_HAS_SHARED_MEMORY = has(1);
179:                    APR_HAS_THREADS = has(2);
180:                    APR_HAS_SENDFILE = has(3);
181:                    APR_HAS_MMAP = has(4);
182:                    APR_HAS_FORK = has(5);
183:                    APR_HAS_RANDOM = has(6);
184:                    APR_HAS_OTHER_CHILD = has(7);
185:                    APR_HAS_DSO = has(8);
186:                    APR_HAS_SO_ACCEPTFILTER = has(9);
187:                    APR_HAS_UNICODE_FS = has(10);
188:                    APR_HAS_PROC_INVOKED = has(11);
189:                    APR_HAS_USER = has(12);
190:                    APR_HAS_LARGE_FILES = has(13);
191:                    APR_HAS_XTHREAD_FILES = has(14);
192:                    APR_HAS_OS_UUID = has(15);
193:                    APR_IS_BIGENDIAN = has(16);
194:                    APR_FILES_AS_SOCKETS = has(17);
195:                    APR_CHARSET_EBCDIC = has(18);
196:                    APR_TCP_NODELAY_INHERITED = has(19);
197:                    APR_O_NONBLOCK_INHERITED = has(20);
198:                    if (APR_MAJOR_VERSION < 1) {
199:                        throw new UnsatisfiedLinkError(
200:                                "Unsupported APR Version ("
201:                                        + aprVersionString() + ")");
202:                    }
203:                    if (!APR_HAS_THREADS) {
204:                        throw new UnsatisfiedLinkError(
205:                                "Missing APR_HAS_THREADS");
206:                    }
207:                }
208:                return initialize();
209:            }
210:        }
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