Package com.sun.jna

Class CallbackReference

java.lang.Object

java.lang.ref.Reference<T>

java.lang.ref.WeakReference<Callback>

com.sun.jna.CallbackReference

public class CallbackReference
extends WeakReference<Callback>

Provides a reference to an association between a native callback closure and a Java Callback closure.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	CallbackReference.AttachOptions

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final Map<Object,Object>	allocations
(package private) static final Map<Callback,CallbackReference>	callbackMap
(package private) int	callingConvention
(package private) Pointer	cbstruct
(package private) static final Map<Callback,CallbackReference>	directCallbackMap
(package private) Method	method
(package private) static final Map<Pointer,Reference<Callback>>	pointerCallbackMap
(package private) CallbackProxy	proxy
(package private) Pointer	trampoline

Method Summary

Modifier and Type	Method	Description
protected void	dispose()	Free native resources associated with this callback.
(package private) static void	disposeAll()	Dispose of all memory allocated for callbacks.
protected void	finalize()	Free native resources associated with this callback when GC'd.
(package private) static Class<?>	findCallbackClass(Class<?> type)
static Callback	getCallback(Class<?> type, Pointer p)	Return a Callback associated with the given function pointer.
static Pointer	getFunctionPointer(Callback cb)	Return a Pointer to the native function address for the given callback.
Pointer	getTrampoline()	Obtain a pointer to the native glue code for this callback.
(package private) static CallbackThreadInitializer	setCallbackThreadInitializer(Callback cb, CallbackThreadInitializer initializer)

Methods inherited from class java.lang.ref.Reference

clear, clone, enqueue, get, isEnqueued, reachabilityFence, refersTo

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

callbackMap

static final Map<Callback,CallbackReference> callbackMap

directCallbackMap

static final Map<Callback,CallbackReference> directCallbackMap

pointerCallbackMap

static final Map<Pointer,Reference<Callback>> pointerCallbackMap

allocations

static final Map<Object,Object> allocations

cbstruct

Pointer cbstruct

trampoline

Pointer trampoline

proxy

CallbackProxy proxy

method

Method method

callingConvention

int callingConvention

Method Details

setCallbackThreadInitializer

static CallbackThreadInitializer setCallbackThreadInitializer(Callback cb,
 CallbackThreadInitializer initializer)

Parameters:

cb - The Callback instance

initializer - The CallbackThreadInitializer - if null then the associated initializer instance is removed

Returns:

The previous initializer instance (may be null)

getCallback

public static Callback getCallback(Class<?> type,
 Pointer p)

Return a Callback associated with the given function pointer. If the pointer refers to a Java callback trampoline, return the original Java Callback. Otherwise, return a proxy to the native function pointer.

Throws:

IllegalStateException - if the given pointer has already been mapped to a callback of a different type.

findCallbackClass

static Class<?> findCallbackClass(Class<?> type)

getTrampoline

public Pointer getTrampoline()

Obtain a pointer to the native glue code for this callback.

finalize

protected void finalize()

Free native resources associated with this callback when GC'd.

Overrides:

finalize in class Object

dispose

protected void dispose()

Free native resources associated with this callback.

disposeAll

static void disposeAll()

Dispose of all memory allocated for callbacks.

getFunctionPointer

public static Pointer getFunctionPointer(Callback cb)

Return a Pointer to the native function address for the given callback.