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Avoid Unsafe usage where possible (#2403)

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This commit is contained in:
Hannes Greule
2023-09-09 16:07:37 +02:00
committed by GitHub
parent 60a3994d62
commit f36c5d42c7
9 changed files with 43 additions and 111 deletions
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19
worldedit-core/src/main/java/com/fastasyncworldedit/core/util/ReflectionUtils.java
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@ -4,19 +4,19 @@ import sun.misc.Unsafe;
import javax.annotation.Nonnull;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.VarHandle;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.Comparator;
/**
* This is an internal class not meant to be used outside the FAWE internals.
*/
public class ReflectionUtils {
private static final VarHandle REFERENCE_ARRAY_HANDLE = MethodHandles.arrayElementVarHandle(Object[].class);
private static Unsafe UNSAFE;
static {
@ -33,6 +33,21 @@ public class ReflectionUtils {
return t.isInstance(o) ? t.cast(o) : null;
}
/**
* Performs CAS on the array element at the given index.
*
* @param array the array in which to compare and set the value
* @param expectedValue the value expected to be at the index
* @param newValue the new value to be set at the index if the expected value matches
* @param index the index at which to compare and set the value
* @param <T> the type of elements in the array
* @return true if the value at the index was successfully updated to the new value, false otherwise
* @see VarHandle#compareAndSet(Object...)
*/
public static <T> boolean compareAndSet(T[] array, T expectedValue, T newValue, int index) {
return REFERENCE_ARRAY_HANDLE.compareAndSet(array, index, expectedValue, newValue);
}
public static void setAccessibleNonFinal(Field field) {
// let's make the field accessible
field.setAccessible(true);