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* Copyright (C) 2008, 2009 Wayne Meissner
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package org.jruby.cext;
import java.io.File;
import java.util.HashSet;
import java.util.Set;
import org.jruby.Ruby;
import org.jruby.runtime.ThreadContext;
import com.kenai.jffi.Library;
/**
* The {@link ModuleLoader} is responsible for loading native extensions into the process and calling
* their initialization function.
*/
public class ModuleLoader {
private static final Set<Library> modules = new HashSet<Library>();
public static void load(Ruby runtime, String name) {
ThreadContext context = runtime.getCurrentContext();
// Ensure the native code is initialized before we load the library
Native n = Native.getInstance(runtime);
Library lib = Library.openLibrary(name, Library.LAZY | Library.GLOBAL);
if (lib == null) {
throw new UnsatisfiedLinkError(Library.getLastError());
}
String fileName = new File(name).getName();
String initName = fileName;
int dotPos;
if ((dotPos = fileName.lastIndexOf('.')) != -1) {
// Remove the extension, if needed
initName = fileName.substring(0, dotPos);
}
long init = lib.getSymbolAddress("Init_" + initName);
if (init == 0) {
throw new UnsatisfiedLinkError("Could not locate Init_" + initName + " module entry point");
}
GIL.acquire();
try {
n.callInit(context, init);
modules.add(lib);
} finally {
GIL.release();
}
}
}