InstanceInitFunc (java-gi API)

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 InstanceInitFunc extends FunctionPointer

Functional interface declaration of the InstanceInitFunc callback.

See Also:

Method Summary

Modifier and Type

Method

Description

void

run(TypeInstance instance, TypeClass gClass)

A callback function used by the type system to initialize a new instance of a type.

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 instance, MemorySegment gClass)

The upcall method is called from native code.

Method Details
- run
  
  void run(TypeInstance instance, TypeClass gClass)
  
  A callback function used by the type system to initialize a new instance of a type.
  This function initializes all instance members and allocates any resources required by it.
  Initialization of a derived instance involves calling all its parent types instance initializers, so the class member of the instance is altered during its initialization to always point to the class that belongs to the type the current initializer was introduced for.
  The extended members of instance are guaranteed to have been filled with zeros before this function is called.
- upcall
  
  default void upcall(MemorySegment instance, MemorySegment gClass)
  
  The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gobject.TypeInstance, org.gnome.gobject.TypeClass) 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