[SOLVED] Question about JDK 22 / Jextract and their current status

Question about JDK 22 / Jextract and their current status

I noticed that the April 30th build no longer has an "Known Issues" section like previous release.

But I seems still have problem trying to compile some Vulkan header due to bitfield and other C struct not supported. Does anyone have some idea on the status of Jextract?

WARNING: Skipping VkAccelerationStructureSRTMotionInstanceNV.flags (bitfields are not supported)

WARNING: Skipping VkMicromapEXT_T (type Declared(VkMicromapEXT_T) is not supported)

WARNING: Skipping VkOpticalFlowSessionNV_T (type Declared(VkOpticalFlowSessionNV_T) is not supported)

WARNING: Skipping VkShaderEXT_T (type Declared(VkShaderEXT_T) is not supported)

Error message looks like this.

I was expecting the Jextract to work since they remove the known issues section in new release note.

Update: some experiment with GLFW3 and result

 import java.lang.foreign.*;
 import org.glfw3.java.*;


class GLFW_Java {

    public static void main(String[] args) {
        System.loadLibrary("glfw3");
        System.out.print("Start");
        glfw3_h.glfwInit();
        try (Arena arena = Arena.ofConfined()) {
        String window_name_javaString = "Simple Example";
        MemorySegment window_name_C = arena.allocateFrom(window_name_javaString);
        MemorySegment window = (MemorySegment) 
        glfw3_h.glfwCreateWindow(640, 480, window_name_C, null, null);
        if (window != null) {
                System.out.print(window);
            }
        }
    }
}

Error Message:

Exception in thread "main" java.lang.AssertionError: should not reach here
    at org.glfw3.java.glfw3_h.glfwCreateWindow(glfw3_h.java:4721)
    at GLFW_Java.main(GLFW_Java.java:14)
Caused by: java.lang.NullPointerException
    at org.glfw3.java.glfw3_h.glfwCreateWindow(glfw3_h.java:4719)

Solution

Thanks to JornVernee. Problem solved. GLFW3 now works smoothly with JDK22 and Jextract. Sample code below.
1.Compile GLFW3 according to the official Jextract guide.
2.then run Java with "-I" flag to include .dll/.dylib should run smoothly.

import java.lang.foreign.*;
import org.glfw3.java.*;


class GLFW_Java {

    public static void main(String[] args) {
        System.loadLibrary("glfw3");
        System.out.print("Start");
        glfw3_h.glfwInit();
        try (Arena arena = Arena.ofConfined()) {
            String window_name_javaString = "Simple Example";
            MemorySegment window_name_C = arena.allocateFrom(window_name_javaString);
            MemorySegment window = (MemorySegment) glfw3_h.glfwCreateWindow(640, 480, window_name_C, MemorySegment.NULL, MemorySegment.NULL);
            if (window != null) {
                System.out.print(window);
            }

            glfw3_h.glfwMakeContextCurrent(window);

            while (glfw3_h.glfwWindowShouldClose(window) == 0) {
                glfw3_h.glfwSwapBuffers(window);
                glfw3_h.glfwPollEvents();
            }

            glfw3_h.glfwDestroyWindow(window);
            glfw3_h.glfwTerminate();

        }
    }
}