Updated netty-tcnative to version 2.0.0.Final

java/io/netty/internal/tcnative/Library.java

+/*
+ * Copyright 2016 The Netty Project
+ *
+ * The Netty Project 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.
+ */
+/*
+ *  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 io.netty.internal.tcnative;
+
+import java.io.File;
+
+public final class Library {
+
+    /* Default library names */
+    private static final String [] NAMES = {"netty-tcnative", "libnetty-tcnative", "netty-tcnative-1", "libnetty-tcnative-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) {
+                throw t;
+            } catch (Throwable t) {
+                String name = System.mapLibraryName(NAMES[i]);
+                for (int j = 0; j < paths.length; j++) {
+                    File fd = new File(paths[j] , name);
+                    if (fd.exists()) {
+                        // File exists but failed to load
+                        throw new RuntimeException(t);
+                    }
+                }
+                if (i > 0) {
+                    err.append(", ");
+                }
+                err.append(t.getMessage());
+            }
+            if (loaded) {
+                break;
+            }
+        }
+        if (!loaded) {
+            throw new UnsatisfiedLinkError(err.toString());
+        }
+    }
+
+    private Library(String libraryName)
+    {
+        if (!"provided".equals(libraryName)) {
+            System.loadLibrary(libraryName);
+        }
+    }
+
+    /* create global TCN's APR pool
+     * This has to be the first call to TCN library.
+     */
+    private static native boolean initialize0();
+
+    /* 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);
+
+    /* APR_VERSION_STRING */
+    private static native String aprVersionString();
+
+    /**
+     * Calls {@link #initialize(String, String)} with {@code "provided"} and {@code null}.
+     *
+     * @return {@code true} if initialization was successful
+     * @throws Exception if an error happens during initialization
+     */
+    public static boolean initialize() throws Exception {
+        return initialize("provided", null);
+    }
+
+    /**
+     * Setup native library. This is the first method that must be called!
+     *
+     * @param libraryName the name of the library to load
+     * @param engine Support for external a Crypto Device ("engine"), usually
+     * @return {@code true} if initialization was successful
+     * @throws Exception if an error happens during initialization
+     */
+    public static boolean initialize(String libraryName, String engine) throws Exception {
+        if (_instance == null) {
+            if (libraryName == null)
+                _instance = new Library();
+            else
+                _instance = new Library(libraryName);
+            int aprMajor  = version(0x11);
+
+            if (aprMajor < 1) {
+                throw new UnsatisfiedLinkError("Unsupported APR Version (" +
+                                               aprVersionString() + ")");
+            }
+
+            boolean aprHasThreads = has(2);
+            if (!aprHasThreads) {
+                throw new UnsatisfiedLinkError("Missing APR_HAS_THREADS");
+            }
+        }
+        return initialize0() && SSL.initialize(engine) == 0;
+    }
+}