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Diffstat (limited to 'src/java/com/sun/gluegen/runtime/NativeLibrary.java')
| -rwxr-xr-x | src/java/com/sun/gluegen/runtime/NativeLibrary.java | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/src/java/com/sun/gluegen/runtime/NativeLibrary.java b/src/java/com/sun/gluegen/runtime/NativeLibrary.java deleted file mode 100755 index 1341012..0000000 --- a/src/java/com/sun/gluegen/runtime/NativeLibrary.java +++ /dev/null @@ -1,404 +0,0 @@ -/* - * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * - Redistribution of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistribution in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * Neither the name of Sun Microsystems, Inc. or the names of - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * This software is provided "AS IS," without a warranty of any kind. ALL - * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, - * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A - * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN - * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR - * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR - * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR - * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR - * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE - * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, - * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF - * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. - * - * You acknowledge that this software is not designed or intended for use - * in the design, construction, operation or maintenance of any nuclear - * facility. - * - * Sun gratefully acknowledges that this software was originally authored - * and developed by Kenneth Bradley Russell and Christopher John Kline. - */ - -package com.sun.gluegen.runtime; - -import java.io.*; -import java.lang.reflect.*; -import java.security.*; -import java.util.*; - -/** Provides low-level, relatively platform-independent access to - shared ("native") libraries. The core library routines - <code>System.load()</code> and <code>System.loadLibrary()</code> - in general provide suitable functionality for applications using - native code, but are not flexible enough to support certain kinds - of glue code generation and deployment strategies. This class - supports direct linking of native libraries to other shared - objects not necessarily installed on the system (in particular, - via the use of dlopen(RTLD_GLOBAL) on Unix platforms) as well as - manual lookup of function names to support e.g. GlueGen's - ProcAddressTable glue code generation style without additional - supporting code needed in the generated library. */ - -public class NativeLibrary { - private static final int WINDOWS = 1; - private static final int UNIX = 2; - private static final int MACOSX = 3; - private static boolean DEBUG; - private static int platform; - private static DynamicLinker dynLink; - private static String[] prefixes; - private static String[] suffixes; - - static { - // Determine platform we're running on - AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - String osName = System.getProperty("os.name").toLowerCase(); - if (osName.startsWith("wind")) { - platform = WINDOWS; - } else if (osName.startsWith("mac os x")) { - platform = MACOSX; - } else { - platform = UNIX; - } - - DEBUG = (System.getProperty("gluegen.debug.NativeLibrary") != null); - - return null; - } - }); - // Instantiate dynamic linker implementation - switch (platform) { - case WINDOWS: - dynLink = new WindowsDynamicLinkerImpl(); - prefixes = new String[] { "" }; - suffixes = new String[] { ".dll" }; - break; - case UNIX: - dynLink = new UnixDynamicLinkerImpl(); - prefixes = new String[] { "lib" }; - suffixes = new String[] { ".so" }; - break; - case MACOSX: - dynLink = new MacOSXDynamicLinkerImpl(); - prefixes = new String[] { "lib", "" }; - suffixes = new String[] { ".dylib", ".jnilib", "" }; - break; - default: - throw new InternalError("Platform not initialized properly"); - } - } - - // Platform-specific representation for the handle to the open - // library. This is an HMODULE on Windows and a void* (the result of - // a dlopen() call) on Unix and Mac OS X platforms. - private long libraryHandle; - - // May as well keep around the path to the library we opened - private String libraryPath; - - // Private constructor to prevent arbitrary instances from floating around - private NativeLibrary(long libraryHandle, String libraryPath) { - this.libraryHandle = libraryHandle; - this.libraryPath = libraryPath; - } - - /** Opens the given native library, assuming it has the same base - name on all platforms, looking first in the system's search - path, and in the context of the specified ClassLoader, which is - used to help find the library in the case of e.g. Java Web Start. */ - public static NativeLibrary open(String libName, ClassLoader loader) { - return open(libName, libName, libName, true, loader); - } - - /** Opens the given native library, assuming it has the given base - names (no "lib" prefix or ".dll/.so/.dylib" suffix) on the - Windows, Unix and Mac OS X platforms, respectively, and in the - context of the specified ClassLoader, which is used to help find - the library in the case of e.g. Java Web Start. The - searchSystemPathFirst argument changes the behavior to first - search the default system path rather than searching it last. - Note that we do not currently handle DSO versioning on Unix. - Experience with JOAL and OpenAL has shown that it is extremely - problematic to rely on a specific .so version (for one thing, - ClassLoader.findLibrary on Unix doesn't work with files not - ending in .so, for example .so.0), and in general if this - dynamic loading facility is used correctly the version number - will be irrelevant. - */ - public static NativeLibrary open(String windowsLibName, - String unixLibName, - String macOSXLibName, - boolean searchSystemPathFirst, - ClassLoader loader) { - List possiblePaths = enumerateLibraryPaths(windowsLibName, - unixLibName, - macOSXLibName, - searchSystemPathFirst, - loader); - // Iterate down these and see which one if any we can actually find. - for (Iterator iter = possiblePaths.iterator(); iter.hasNext(); ) { - String path = (String) iter.next(); - if (DEBUG) { - System.out.println("Trying to load " + path); - } - ensureNativeLibLoaded(); - long res = dynLink.openLibrary(path); - if (res != 0) { - if (DEBUG) { - System.out.println("Successfully loaded " + path + ": res = 0x" + Long.toHexString(res)); - } - return new NativeLibrary(res, path); - } - } - - if (DEBUG) { - System.out.println("Did not succeed in loading (" + windowsLibName + ", " + unixLibName + ", " + macOSXLibName + ")"); - } - - // For now, just return null to indicate the open operation didn't - // succeed (could also throw an exception if we could tell which - // of the openLibrary operations actually failed) - return null; - } - - /** Looks up the given function name in this native library. */ - public long lookupFunction(String functionName) { - if (libraryHandle == 0) - throw new RuntimeException("Library is not open"); - return dynLink.lookupSymbol(libraryHandle, functionName); - } - - /** Retrieves the low-level library handle from this NativeLibrary - object. On the Windows platform this is an HMODULE, and on Unix - and Mac OS X platforms the void* result of calling dlopen(). */ - public long getLibraryHandle() { - return libraryHandle; - } - - /** Retrieves the path under which this library was opened. */ - public String getLibraryPath() { - return libraryPath; - } - - /** Closes this native library. Further lookup operations are not - allowed after calling this method. */ - public void close() { - if (libraryHandle == 0) - throw new RuntimeException("Library already closed"); - long handle = libraryHandle; - libraryHandle = 0; - dynLink.closeLibrary(handle); - } - - /** Given the base library names (no prefixes/suffixes) for the - various platforms, enumerate the possible locations and names of - the indicated native library on the system. */ - private static List enumerateLibraryPaths(String windowsLibName, - String unixLibName, - String macOSXLibName, - boolean searchSystemPathFirst, - ClassLoader loader) { - List paths = new ArrayList(); - String libName = selectName(windowsLibName, unixLibName, macOSXLibName); - if (libName == null) - return paths; - - // Allow user's full path specification to override our building of paths - File file = new File(libName); - if (file.isAbsolute()) { - paths.add(libName); - return paths; - } - - String[] baseNames = buildNames(libName); - - if (searchSystemPathFirst) { - // Add just the library names to use the OS's search algorithm - for (int i = 0; i < baseNames.length; i++) { - paths.add(baseNames[i]); - } - } - - // The idea to ask the ClassLoader to find the library is borrowed - // from the LWJGL library - String clPath = getPathFromClassLoader(libName, loader); - if (DEBUG) { - System.out.println("Class loader path to " + libName + ": " + clPath); - } - if (clPath != null) { - paths.add(clPath); - } - - // Add entries from java.library.path - String javaLibraryPath = - (String) AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - return System.getProperty("java.library.path"); - } - }); - if (javaLibraryPath != null) { - StringTokenizer tokenizer = new StringTokenizer(javaLibraryPath, File.pathSeparator); - while (tokenizer.hasMoreTokens()) { - addPaths(tokenizer.nextToken(), baseNames, paths); - } - } - - // Add current working directory - String userDir = - (String) AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - return System.getProperty("user.dir"); - } - }); - addPaths(userDir, baseNames, paths); - - // Add probable Mac OS X-specific paths - if (platform == MACOSX) { - // Add historical location - addPaths("/Library/Frameworks/" + libName + ".Framework", baseNames, paths); - // Add current location - addPaths("/System/Library/Frameworks/" + libName + ".Framework", baseNames, paths); - } - - if (!searchSystemPathFirst) { - // Add just the library names to use the OS's search algorithm - for (int i = 0; i < baseNames.length; i++) { - paths.add(baseNames[i]); - } - } - - return paths; - } - - - private static String selectName(String windowsLibName, - String unixLibName, - String macOSXLibName) { - switch (platform) { - case WINDOWS: - return windowsLibName; - case UNIX: - return unixLibName; - case MACOSX: - return macOSXLibName; - default: - throw new InternalError(); - } - } - - private static String[] buildNames(String libName) { - // If the library name already has the prefix / suffix added - // (principally because we want to force a version number on Unix - // operating systems) then just return the library name. - if (libName.startsWith(prefixes[0])) { - if (libName.endsWith(suffixes[0])) { - return new String[] { libName }; - } - - int idx = libName.indexOf(suffixes[0]); - boolean ok = true; - if (idx >= 0) { - // Check to see if everything after it is a Unix version number - for (int i = idx + suffixes[0].length(); - i < libName.length(); - i++) { - char c = libName.charAt(i); - if (!(c == '.' || (c >= '0' && c <= '9'))) { - ok = false; - break; - } - } - if (ok) { - return new String[] { libName }; - } - } - } - - String[] res = new String[prefixes.length * suffixes.length]; - int idx = 0; - for (int i = 0; i < prefixes.length; i++) { - for (int j = 0; j < suffixes.length; j++) { - res[idx++] = prefixes[i] + libName + suffixes[j]; - } - } - return res; - } - - private static void addPaths(String path, String[] baseNames, List paths) { - for (int j = 0; j < baseNames.length; j++) { - paths.add(path + File.separator + baseNames[j]); - } - } - - private static boolean initializedFindLibraryMethod = false; - private static Method findLibraryMethod = null; - private static String getPathFromClassLoader(final String libName, final ClassLoader loader) { - if (loader == null) - return null; - if (!initializedFindLibraryMethod) { - AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - try { - findLibraryMethod = ClassLoader.class.getDeclaredMethod("findLibrary", - new Class[] { String.class }); - findLibraryMethod.setAccessible(true); - } catch (Exception e) { - // Fail silently disabling this functionality - } - initializedFindLibraryMethod = true; - return null; - } - }); - } - if (findLibraryMethod != null) { - try { - return (String) AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - try { - return findLibraryMethod.invoke(loader, new Object[] { libName }); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - }); - } catch (Exception e) { - if (DEBUG) { - e.printStackTrace(); - } - // Fail silently and continue with other search algorithms - } - } - return null; - } - - private static volatile boolean loadedDynLinkNativeLib; - private static void ensureNativeLibLoaded() { - if (!loadedDynLinkNativeLib) { - synchronized (NativeLibrary.class) { - if (!loadedDynLinkNativeLib) { - loadedDynLinkNativeLib = true; - NativeLibLoader.loadGlueGenRT(); - } - } - } - } -} |