| java.lang.Object
 org.apache.harmony.kernel.vm.Objects
| Objects | | public class Objects (Code) | |
This class must be implemented by the VM to support Object manipulation.
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| Method Summary | |
| public boolean | compareAndSwapInt(Object object, long fieldOffset, int expected, int update)
Compares and swaps the value of an int-typed field on an Object instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. | | public boolean | compareAndSwapLong(Object object, long fieldOffset, long expected, long update)
Compares and swaps the value of a long-typed field on an Object instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. | | public boolean | compareAndSwapObject(Object object, long fieldOffset, Object expected, Object update)
Compares and swaps the value of an Object-typed field on an Object
instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. | | public int | getArrayBaseOffset(Class clazz)
Retrieves the base offset for the array Class given. | | public int | getArrayIndexScale(Class clazz)
Retrieves the array index scale for the array Class given. | | public long | getFieldOffset(Field field)
Retrieves the offset value of the
Field for use by other methods
in this class.
Parameters:
field - The Field to retrieve the offset for. | | public static Objects | getInstance()
Retrieves an instance of the Objects service. | | public int | getIntVolatile(Object object, long fieldOffset)
Reads an int value from an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. | | public long | getLong(Object object, long fieldOffset)
Reads a long value from an Object's field.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. | | public long | getLongVolatile(Object object, long fieldOffset)
Reads a long value from an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. | | public Object | getObjectVolatile(Object object, long fieldOffset)
Writes an int value to an Object's field as though it were declared
volatile. | | public void | putIntVolatile(Object object, long fieldOffset, int newValue)
Writes an int value to an Object's field as though it were declared
volatile. | | public void | putLong(Object object, long fieldOffset, long newValue)
Writes a long value to an Object's field. | | public void | putLongVolatile(Object object, long fieldOffset, long newValue)
Writes a long value to an Object's field as though it were declared
volatile. | | public void | putObjectVolatile(Object object, long fieldOffset, Object newValue)
Writes an Object reference value to an Object's field as though it were
declared volatile. |
| compareAndSwapInt | | public boolean compareAndSwapInt(Object object, long fieldOffset, int expected, int update)(Code) | |
Compares and swaps the value of an int-typed field on an Object instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. true if the field was updated, falseotherwise. |
| compareAndSwapLong | | public boolean compareAndSwapLong(Object object, long fieldOffset, long expected, long update)(Code) | |
Compares and swaps the value of a long-typed field on an Object instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. true if the field was updated, falseotherwise. |
| compareAndSwapObject | | public boolean compareAndSwapObject(Object object, long fieldOffset, Object expected, Object update)(Code) | |
Compares and swaps the value of an Object-typed field on an Object
instance.
Parameters:
object - The instance containing the field.
Parameters:
fieldOffset - The offset value of the field.
Parameters:
expected - The expected value of the field.
Parameters:
update - The new value to write to the field. true if the field was updated, falseotherwise. |
| getArrayBaseOffset | | public int getArrayBaseOffset(Class clazz)(Code) | |
Retrieves the base offset for the array Class given. The Class passed
MUST me an array type, such that the method
Class.isArray returns true. For example, int[].class.
Parameters:
clazz - The array Class object. The base offset value.
throws:
NullPointerException - if clazz is null.
throws:
IllegalArgumentException - if clazz is not an array type. |
| getArrayIndexScale | | public int getArrayIndexScale(Class clazz)(Code) | |
Retrieves the array index scale for the array Class given. The index
scale is the value used to determine the offset of a particular element
in the array given the array's base offset and an index. The following
code snippet illustrates the usage.
int base = Objects.getArrayBaseOffset(int[].class);
int scale = Objects.getArrayIndexScale(int[].class);
int elementIdx = 1;
int[] array = { 0, 1, 2 };
long offsetForIdx = base + (elementIdx * scale);
The Class passed MUST me an array type, such that the method
Class.isArray returns true. For example,
int[].class.
Parameters:
clazz - The array Class object. The index scale value.
throws:
NullPointerException - if clazz is null.
throws:
IllegalArgumentException - if clazz is not an array type. |
| getFieldOffset | | public long getFieldOffset(Field field)(Code) | |
Retrieves the offset value of the
Field for use by other methods
in this class.
Parameters:
field - The Field to retrieve the offset for. The offset value. |
| getInstance | | public static Objects getInstance()(Code) | |
Retrieves an instance of the Objects service.
An instance of Objects. |
| getIntVolatile | | public int getIntVolatile(Object object, long fieldOffset)(Code) | |
Reads an int value from an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. The value that was read. |
| getLong | | public long getLong(Object object, long fieldOffset)(Code) | |
Reads a long value from an Object's field.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. The value that was read. |
| getLongVolatile | | public long getLongVolatile(Object object, long fieldOffset)(Code) | |
Reads a long value from an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to read from.
Parameters:
fieldOffset - The offset of the field to read from. The value that was read. |
| getObjectVolatile | | public Object getObjectVolatile(Object object, long fieldOffset)(Code) | |
Writes an int value to an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to write to.
Parameters:
fieldOffset - The offset of the field to write to.
Parameters:
newValue - The value to write. |
| putIntVolatile | | public void putIntVolatile(Object object, long fieldOffset, int newValue)(Code) | |
Writes an int value to an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to write to.
Parameters:
fieldOffset - The offset of the field to write to.
Parameters:
newValue - The value to write. |
| putLong | | public void putLong(Object object, long fieldOffset, long newValue)(Code) | |
Writes a long value to an Object's field.
Parameters:
object - The instance containing the field to write to.
Parameters:
fieldOffset - The offset of the field to write to.
Parameters:
newValue - The value to write. |
| putLongVolatile | | public void putLongVolatile(Object object, long fieldOffset, long newValue)(Code) | |
Writes a long value to an Object's field as though it were declared
volatile.
Parameters:
object - The instance containing the field to write to.
Parameters:
fieldOffset - The offset of the field to write to.
Parameters:
newValue - The value to write. |
| putObjectVolatile | | public void putObjectVolatile(Object object, long fieldOffset, Object newValue)(Code) | |
Writes an Object reference value to an Object's field as though it were
declared volatile.
Parameters:
object - The instance containing the field to write to.
Parameters:
fieldOffset - The offset of the field to write to.
Parameters:
newValue - The value to write. |
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