Package org.gnome.glib

Interface CompareDataFunc

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 CompareDataFunc
extends FunctionPointer

Functional interface declaration of the CompareDataFunc callback.

See Also:

• run(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment)

Method Summary

Modifier and Type	Method	Description
int	run(@Nullable MemorySegment a, @Nullable MemorySegment b)	Specifies the type of a comparison function used to compare two values.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment a, MemorySegment b, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

int run(@Nullable
 @Nullable MemorySegment a,
 @Nullable
 @Nullable MemorySegment b)

Specifies the type of a comparison function used to compare two values. The function should return a negative integer if the first value comes before the second, 0 if they are equal, or a positive integer if the first value comes after the second.

upcall

default int upcall(MemorySegment a,
 MemorySegment b,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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