org.jruby.util.unsafe.UnsafeFactory Maven / Gradle / Ivy
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package org.jruby.util.unsafe;
import java.lang.reflect.Field;
public class UnsafeFactory {
private static final Unsafe unsafe = loadUnsafe();
private static final boolean DEBUG = false;
private static Unsafe loadUnsafe() {
Unsafe unsafe = null;
// first try our custom-generated Unsafe
try {
Class unsafeClass = Class.forName("org.jruby.util.unsafe.GeneratedUnsafe");
unsafe = (Unsafe)unsafeClass.newInstance();
} catch (Throwable ignore) {
if (DEBUG) ignore.printStackTrace();
}
// then try Sun's Unsafe
try {
Class unsafeClass = Class.forName("sun.misc.Unsafe");
Field field = unsafeClass.getDeclaredField("theUnsafe");
field.setAccessible(true);
// if we get here, the class and field exist; construct our Unsafe impl
// that calls it directly
unsafe = (Unsafe)Class.forName("org.jruby.util.unsafe.SunUnsafeWrapper").newInstance();
} catch (Throwable ignore) {
if (DEBUG) ignore.printStackTrace();
}
// else leave it null
if (DEBUG && unsafe == null) System.err.println("No Unsafe implementation available");
return unsafe;
}
public static Unsafe getUnsafe() {
return unsafe;
}
}
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