Scala Native pthread attempt

pthread.scala

import scala.scalanative.native._
import scala.scalanative.runtime.GC

@extern
@link("pthread")
object pthread {
  type pthread_t = Ptr[CStruct0]
  type pthread_attr_t = CStruct0
  def pthread_create(thread: Ptr[pthread_t], attr: Ptr[pthread_attr_t],
                     start_routine: CFunctionPtr1[Ptr[Byte], Ptr[Byte]], arg: Ptr[Byte]): CInt = extern
  def pthread_join(thread: pthread_t, value_ptr: Ptr[Ptr[Byte]]): CInt = extern
}


object Main extends App {
  import pthread._

  val EPERM = 1
  val EINVAL = 22
  val EAGAIN = 35

  val f: CFunctionPtr1[Ptr[Byte], Ptr[Byte]] =
    (p: Ptr[Byte]) => {
      println("Entering thread")
      Thread.sleep(1000)
      println("Leaving thread")
      null
    }

  val thread = stackalloc[pthread_t]
  pthread_create(thread, null, f, null)
  pthread_join(!thread, null)
  println("done")
}