/* * Copyright (c) 2012, 2018, 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. * * 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 jdk.internal.vm.compiler.word; /** * Lowest-level memory access of native C memory. *
* Do not use these methods to access Java objects. These methods access the raw memory without any * null checks, read- or write barriers. Even when the VM uses compressed pointers, then readObject * and writeObject methods access uncompressed pointers. * * @since 1.0 */ public interface Pointer extends UnsignedWord, PointerBase { /** * Unsafe conversion of this Pointer to a Java language object. No correctness checks or type * checks are performed. The caller must ensure that the Pointer contains a valid Java object * that can i.e., processed by the garbage collector. * * @return this Pointer cast to Object. * * @since 1.0 */ Object toObject(); /** * Unsafe conversion of this Pointer to a Java language object. No correctness checks or type * checks are performed. The caller must ensure that the Pointer contains a valid Java object * that can i.e., processed by the garbage collector and the Pointer does not contain 0. * * @return this Pointer cast to non-null Object. * * @since 1.0 */ Object toObjectNonNull(); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ byte readByte(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ char readChar(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ short readShort(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ int readInt(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ long readLong(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ float readFloat(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is * {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller * knows that the highest-order bit of the unsigned value is never used). * * @param offset the signed offset for the memory access * @param locationIdentity the identity of the read * @return the result of the memory access * * @since 1.0 */ double readDouble(WordBase offset, LocationIdentity locationIdentity); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in * bytes. *
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
Object readObject(WordBase offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
byte readByte(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
char readChar(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
short readShort(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
int readInt(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
long readLong(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
float readFloat(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
double readDouble(int offset, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the read
* @return the result of the memory access
*
* @since 1.0
*/
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeByte(WordBase offset, byte val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeChar(WordBase offset, char val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeShort(WordBase offset, short val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeInt(WordBase offset, int val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeLong(WordBase offset, long val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeFloat(WordBase offset, float val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeDouble(WordBase offset, double val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeWord(WordBase offset, WordBase val, LocationIdentity locationIdentity);
/**
* Initializes the memory at address {@code (this + offset)}. Both the base address and offset
* are in bytes. The memory must be uninitialized or zero prior to this operation.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void initializeLong(WordBase offset, long val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeObject(WordBase offset, Object val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeByte(int offset, byte val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeChar(int offset, char val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeShort(int offset, short val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeInt(int offset, int val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeLong(int offset, long val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeFloat(int offset, float val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeDouble(int offset, double val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeWord(int offset, WordBase val, LocationIdentity locationIdentity);
/**
* Initializes the memory at address {@code (this + offset)}. Both the base address and offset
* are in bytes. The memory must be uninitialized or zero prior to this operation.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void initializeLong(int offset, long val, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param locationIdentity the identity of the write
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeObject(int offset, Object val, LocationIdentity locationIdentity);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
byte readByte(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
char readChar(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
short readShort(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
int readInt(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
long readLong(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
float readFloat(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
double readDouble(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
Object readObject(WordBase offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
byte readByte(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
char readChar(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
short readShort(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
int readInt(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
long readLong(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
float readFloat(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
double readDouble(int offset);
/**
* Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @return the result of the memory access
*
* @since 1.0
*/
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeByte(WordBase offset, byte val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeChar(WordBase offset, char val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeShort(WordBase offset, short val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeInt(WordBase offset, int val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeLong(WordBase offset, long val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeFloat(WordBase offset, float val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeDouble(WordBase offset, double val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeWord(WordBase offset, WordBase val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeObject(WordBase offset, Object val);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
int compareAndSwapInt(WordBase offset, int expectedValue, int newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
long compareAndSwapLong(WordBase offset, long expectedValue, long newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
Object compareAndSwapObject(WordBase offset, Object expectedValue, Object newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return {@code true} if successful. False return indicates that the actual value was not
* equal to the expected value.
*
* @since 1.0
*/
boolean logicCompareAndSwapInt(WordBase offset, int expectedValue, int newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return {@code true} if successful. False return indicates that the actual value was not
* equal to the expected value.
*
* @since 1.0
*/
boolean logicCompareAndSwapLong(WordBase offset, long expectedValue, long newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return {@code true} if successful. False return indicates that the actual value was not
* equal to the expected value.
*
* @since 1.0
*/
boolean logicCompareAndSwapWord(WordBase offset, WordBase expectedValue, WordBase newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* The offset is always treated as a {@link SignedWord} value. However, the static type is
* {@link WordBase} to avoid the frequent casts of {@link UnsignedWord} values (where the caller
* knows that the highest-order bit of the unsigned value is never used).
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return {@code true} if successful. False return indicates that the actual value was not
* equal to the expected value.
*
* @since 1.0
*/
boolean logicCompareAndSwapObject(WordBase offset, Object expectedValue, Object newValue, LocationIdentity locationIdentity);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeByte(int offset, byte val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeChar(int offset, char val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeShort(int offset, short val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeInt(int offset, int val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeLong(int offset, long val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeFloat(int offset, float val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeDouble(int offset, double val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeWord(int offset, WordBase val);
/**
* Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
* bytes.
*
* @param offset the signed offset for the memory access
* @param val the value to be written to memory
*
* @since 1.0
*/
void writeObject(int offset, Object val);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
int compareAndSwapInt(int offset, int expectedValue, int newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/
long compareAndSwapLong(int offset, long expectedValue, long newValue, LocationIdentity locationIdentity);
/**
* In a single atomic step, compares the memory at address {@code (this + offset)} to the
* expected value, and if equal, exchanges it for the new value. Both the base address and
* offset are in bytes.
*
* @param offset the signed offset for the memory access
* @param expectedValue the expected current value at the memory address
* @param newValue the new value for the atomic exchange
* @param locationIdentity the identity of the memory location
* @return The value that was read for comparison, which is {@code expectedValue} if the
* exchange was performed.
*
* @since 1.0
*/