com.jniwrapper.win32.system

Class LocalMemoryBlock

java.lang.Object

com.jniwrapper.Parameter

com.jniwrapper.Pointer.Void

com.jniwrapper.win32.Handle

com.jniwrapper.win32.system.LocalMemoryBlock

All Implemented Interfaces:

com.jniwrapper.IntegerParameter, com.jniwrapper.PointerParameter

public class LocalMemoryBlock
extends Handle

This class represents a local memory block and corresponds to the HLOCAL native type.

Field Summary

Fields inherited from class com.jniwrapper.win32.Handle

INFINITE_TIMEOUT, INVALID_HANDLE_VALUE, STATUS_ABANDONED_WAIT_0, STATUS_TIMEOUT, STATUS_WAIT_0

Fields inherited from class com.jniwrapper.Parameter

LICENSE_TYPE, V

Constructor Summary

Constructors

Constructor and Description
LocalMemoryBlock() Creates a LocalMemoryBlock object.
LocalMemoryBlock(Handle handle) Creates a LocalMemoryBlock object that references the memory that handles references.
LocalMemoryBlock(int size, MemoryAllocationAttributes attributes) Allocates a local memory block of the specified size.

Method Summary

Modifier and Type	Method and Description
void	free() Frees the allocated memory.
static void	localFree(com.jniwrapper.Parameter localMemoryBlock) Frees the allocated memory.
Handle	lock() Locks the memory block and returns a pointer to the allocated memory.
int	size() Returns the size of the allocated memory block.
int	unlock() Decrements the lock count for the memory block.

Methods inherited from class com.jniwrapper.win32.Handle

clone, closeHandle, equals, waitFor, waitFor

Methods inherited from class com.jniwrapper.Pointer.Void

asFunction, asFunction, asTypedPointer, castTo, castTo, getDebugInfo, getLength, getValue, hashCode, isNull, read, setValue, toString, write

Methods inherited from class com.jniwrapper.Parameter

acceptIOPerformer, asReturnValue, dataBufferAssigned, getAlignedLength, getAlignmentRequirement, getDataBuffer, getDataBufferOffset, indent, pop, push, read, read, setDataBuffer, toByteArray, write

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LocalMemoryBlock

public LocalMemoryBlock()

Creates a LocalMemoryBlock object.

LocalMemoryBlock

public LocalMemoryBlock(Handle handle)

Creates a LocalMemoryBlock object that references the memory that handles references.

Parameters:

handle - handle to the local memory block

LocalMemoryBlock

public LocalMemoryBlock(int size,
                        MemoryAllocationAttributes attributes)

Allocates a local memory block of the specified size.

Parameters:

size - the size of the allocated memory

attributes - allocation attributes

Method Detail

free

public void free()

Frees the allocated memory.

Throws:

java.lang.RuntimeException - if failed to free the memory block.

localFree

public static void localFree(com.jniwrapper.Parameter localMemoryBlock)

Frees the allocated memory.

Throws:

java.lang.RuntimeException - if failed to free the memory block.

size

public int size()

Returns the size of the allocated memory block.

Returns:

size of the allocated memory block.

lock

public Handle lock()

Locks the memory block and returns a pointer to the allocated memory.

Returns:

pointer to the allocated memory.

unlock

public int unlock()

Decrements the lock count for the memory block.

Returns:

lock count after decrementing. If the lock count is zero and GetLastError function returns NO_ERROR, the memory block is unlocked.