Package org.gnome.gobject

Interface Callback

All Superinterfaces:

FunctionPointer

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface Callback
extends FunctionPointer

Functional interface declaration of the Callback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
void	run()	The type used for callback functions in structure definitions and function signatures.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall() method.
default void	upcall()	The upcall method is called from native code.

Method Details

run

void run()

The type used for callback functions in structure definitions and function signatures.

This doesn't mean that all callback functions must take no parameters and return void. The required signature of a callback function is determined by the context in which is used (e.g. the signal to which it is connected).

Use G_CALLBACK() to cast the callback function to a GCallback.

upcall

default void upcall()

The upcall method is called from native code. The parameters are marshaled and run() is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall() method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer