Package org.gnome.gobject

Interface TypeValueCopyFunc

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 TypeValueCopyFunc
extends FunctionPointer

Functional interface declaration of the TypeValueCopyFunc callback.

See Also:

• run(org.gnome.gobject.Value, org.gnome.gobject.Value)

Method Summary

Modifier and Type	Method	Description
void	run(Value srcValue, Value destValue)	Copies the content of a GValue into another.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment srcValue, MemorySegment destValue)	The upcall method is called from native code.

Method Details

run

void run(Value srcValue,
 Value destValue)

Copies the content of a GValue into another.

The destValue is a GValue with zero-filled data section and srcValue is a properly initialized GValue of same type, or derived type.

The purpose of this function is to copy the contents of srcValue into destValue in a way, that even after srcValue has been freed, the contents of destValue remain valid. String type example:

dest_value->data[0].v_pointer = g_strdup (src_value->data[0].v_pointer);
 

upcall

default void upcall(MemorySegment srcValue,
 MemorySegment destValue)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gobject.Value, org.gnome.gobject.Value) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer