/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.truffle.api.utilities;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import java.util.Objects;
/**
* @deprecated use {@link com.oracle.truffle.api.profiles.PrimitiveValueProfile} instead
* @since 0.8 or earlier
*/
@Deprecated
@SuppressWarnings("deprecation")
public class PrimitiveValueProfile extends ValueProfile {
private static final Object UNINITIALIZED = new Object();
private static final Object GENERIC = new Object();
@CompilationFinal private Object cachedValue = UNINITIALIZED;
PrimitiveValueProfile() {
}
/** @since 0.8 or earlier */
@SuppressWarnings("unchecked")
@Override
public <T> T profile(T v) {
Object value = v;
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Byte) {
if (value instanceof Byte && (byte) snapshot == (byte) value) {
return (T) snapshot;
}
} else if (snapshot instanceof Short) {
if (value instanceof Short && (short) snapshot == (short) value) {
return (T) snapshot;
}
} else if (snapshot instanceof Integer) {
if (value instanceof Integer && (int) snapshot == (int) value) {
return (T) snapshot;
}
} else if (snapshot instanceof Long) {
if (value instanceof Long && (long) snapshot == (long) value) {
return (T) snapshot;
}
} else if (snapshot instanceof Float) {
if (value instanceof Float && exactCompare((float) snapshot, (float) value)) {
return (T) snapshot;
}
} else if (snapshot instanceof Double) {
if (value instanceof Double && exactCompare((double) snapshot, (double) value)) {
return (T) snapshot;
}
} else if (snapshot instanceof Boolean) {
if (value instanceof Boolean && (boolean) snapshot == (boolean) value) {
return (T) snapshot;
}
} else if (snapshot instanceof Character) {
if (value instanceof Character && (char) snapshot == (char) value) {
return (T) snapshot;
}
} else if (snapshot == value) {
return (T) snapshot;
}
cacheMiss(value);
}
return (T) value;
}
/** @since 0.8 or earlier */
public byte profile(byte value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Byte && (byte) snapshot == value) {
return (byte) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public short profile(short value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Short && (short) snapshot == value) {
return (short) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public int profile(int value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Integer && (int) snapshot == value) {
return (int) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public long profile(long value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Long && (long) snapshot == value) {
return (long) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public float profile(float value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Float && exactCompare((float) snapshot, value)) {
return (float) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public double profile(double value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Double && exactCompare((double) snapshot, value)) {
return (double) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public boolean profile(boolean value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Boolean && (boolean) snapshot == value) {
return (boolean) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public char profile(char value) {
Object snapshot = this.cachedValue;
if (snapshot != GENERIC) {
if (snapshot instanceof Character && (char) snapshot == value) {
return (char) snapshot;
} else {
cacheMiss(value);
}
}
return value;
}
/** @since 0.8 or earlier */
public boolean isGeneric() {
return cachedValue == GENERIC;
}
/** @since 0.8 or earlier */
public boolean isUninitialized() {
return cachedValue == UNINITIALIZED;
}
/** @since 0.8 or earlier */
public Object getCachedValue() {
return cachedValue;
}
/** @since 0.8 or earlier */
@Override
public String toString() {
return String.format("%s(%s)@%x", getClass().getSimpleName(), formatValue(), hashCode());
}
private void cacheMiss(Object value) {
// TODO should we try to handle this more atomically?
CompilerDirectives.transferToInterpreterAndInvalidate();
if (cachedValue == UNINITIALIZED) {
cachedValue = value;
} else {
cachedValue = GENERIC;
}
}
/** @since 0.8 or earlier */
public static boolean exactCompare(float a, float b) {
/*
* -0.0 == 0.0, but you can tell the difference through other means, so we need to
* differentiate.
*/
return Float.floatToRawIntBits(a) == Float.floatToRawIntBits(b);
}
/** @since 0.8 or earlier */
public static boolean exactCompare(double a, double b) {
/*
* -0.0 == 0.0, but you can tell the difference through other means, so we need to
* differentiate.
*/
return Double.doubleToRawLongBits(a) == Double.doubleToRawLongBits(b);
}
private String formatValue() {
Object snapshot = this.cachedValue;
if (snapshot == null) {
return "null";
} else if (snapshot == UNINITIALIZED) {
return "uninitialized";
} else if (snapshot == GENERIC) {
return "generic";
} else if (snapshot instanceof Byte || snapshot instanceof Short || snapshot instanceof Integer || snapshot instanceof Long || snapshot instanceof Float || snapshot instanceof Double ||
snapshot instanceof Boolean || snapshot instanceof Character) {
return String.format("%s=%s", snapshot.getClass().getSimpleName(), snapshot);
} else {
return String.format("%s@%x", snapshot.getClass().getSimpleName(), Objects.hash(snapshot));
}
}
}