jdk/src/java.desktop/share/classes/sun/awt/NativeLibLoader.java
author azvegint
Thu, 24 Mar 2016 02:22:01 +0300
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8143227: Platform-Specific Desktop Features Reviewed-by: prr, serb
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/*
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 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package sun.awt;
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class NativeLibLoader {
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    /**
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     * This is copied from java.awt.Toolkit since we need the library
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     * loaded in sun.awt.image also:
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     *
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     * WARNING: This is a temporary workaround for a problem in the
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     * way the AWT loads native libraries. A number of classes in this
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     * package (sun.awt.image) have a native method, initIDs(),
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     * which initializes
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     * the JNI field and method ids used in the native portion of
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     * their implementation.
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     *
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     * Since the use and storage of these ids is done by the
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     * implementation libraries, the implementation of these method is
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     * provided by the particular AWT implementations
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     * (i.e. "Toolkit"s/Peer), such as Motif, Win32 or Tiny. The
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     * problem is that this means that the native libraries must be
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     * loaded by the java.* classes, which do not necessarily know the
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     * names of the libraries to load. A better way of doing this
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     * would be to provide a separate library which defines java.awt.*
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     * initIDs, and exports the relevant symbols out to the
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     * implementation libraries.
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     *
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     * For now, we know it's done by the implementation, and we assume
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     * that the name of the library is "awt".  -br.
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     */
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    static void loadLibraries() {
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        java.security.AccessController.doPrivileged(
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            new java.security.PrivilegedAction<Void>() {
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                public Void run() {
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                    System.loadLibrary("awt");
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                    return null;
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                }
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            });
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    }
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}