Interface TypeValuePeekPointerFunc

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("org.javagi.JavaGI") public interface TypeValuePeekPointerFunc extends FunctionPointer

Functional interface declaration of the TypeValuePeekPointerFunc callback.

See Also:

  • Method Details

    • run

      MemorySegment run(Value value)

      If the value contents fit into a pointer, such as objects or strings, return this pointer, so the caller can peek at the current contents.

      To extend on our above string example:

      return value->data[0].v_pointer;
      Parameters:
      value - the value to peek
      Returns:
      a pointer to the value contents
      Since:
      2.78

    • upcall

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

    • toCallback

      default MemorySegment toCallback(Arena arena)
      Creates a native function pointer to the upcall(MemorySegment) method.
      Specified by:
      toCallback in interface FunctionPointer
      Parameters:
      arena - the arena in which the function pointer is allocated
      Returns:
      the native function pointer