Package org.lwjgl.system

Class Callback

java.lang.Object

org.lwjgl.system.Callback

All Implemented Interfaces:

java.lang.AutoCloseable, NativeResource, Pointer

Direct Known Subclasses:

CGEventTapCallBack, EnumerationMutationHandler, WindowProc

public abstract class Callback
extends java.lang.Object
implements Pointer, NativeResource

Base class for dynamically created native functions that call into Java code.

Callback instances use native resources and must be explicitly freed when no longer used by calling the free() method.

Nested Class Summary

Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer

Pointer.Default

Field Summary

Fields inherited from interface org.lwjgl.system.Pointer

BITS32, BITS64, CLONG_SHIFT, CLONG_SIZE, POINTER_SHIFT, POINTER_SIZE

Method Summary

Modifier and Type	Method	Description
static java.lang.String	__stdcall(java.lang.String signature)
long	address()	Returns the raw pointer address as a long value.
boolean	equals(java.lang.Object o)
void	free()	Frees any native resources held by this object.
static void	free(long functionPointer)	Frees any resources held by the specified function pointer.
static <T extends CallbackI> T	get(long functionPointer)	Converts the specified function pointer to the CallbackI instance associated with it.
static <T extends CallbackI> T	getSafe(long functionPointer)	Like get(long), but returns null if functionPointer is NULL.
int	hashCode()
java.lang.String	toString()

Methods inherited from interface org.lwjgl.system.NativeResource

close

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

address

public long address()

Description copied from interface: Pointer

Returns the raw pointer address as a long value.

Specified by:

address in interface Pointer

Returns:

the pointer address

free

public void free()

Description copied from interface: NativeResource

Frees any native resources held by this object.

Specified by:

free in interface NativeResource

__stdcall

public static java.lang.String __stdcall(java.lang.String signature)

get

public static <T extends CallbackI> T get(long functionPointer)

Converts the specified function pointer to the CallbackI instance associated with it.

Type Parameters:

T - the CallbackI instance type

Parameters:

functionPointer - a function pointer

Returns:

the CallbackI instance

getSafe

@Nullable
public static <T extends CallbackI> T getSafe(long functionPointer)

Like get(long), but returns null if functionPointer is NULL.

free

public static void free(long functionPointer)

Frees any resources held by the specified function pointer.

Parameters:

functionPointer - the function pointer

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object