return p
	}
	r, _, err := d.Proc("CreateThread").Call(0, 0, syscall.NewCallback(f), 123, 0, 0)
	if r == 0 {
		t.Fatalf("CreateThread failed: %v", err)
	}
	h := syscall.Handle(r)
	defer syscall.CloseHandle(h)

	switch s, err := syscall.WaitForSingleObject(h, syscall.INFINITE); s {
	case syscall.WAIT_OBJECT_0:
		break
	case syscall.WAIT_FAILED:
		t.Fatalf("WaitForSingleObject failed: %v", err)
	default:

	if mp.locks != 1 || mp.mallocing != 0 || mp.throwing != throwTypeNone || mp.preemptoff != "" || mp.dying != 0 {
		releasem(mp)
		return false
	}
	status := readgstatus(gp)
	if status&^_Gscan != _Grunning || gp.syscallsp != 0 {
		releasem(mp)
		return false
	}
	if GOOS == "windows" && mp.libcallsp != 0 {
		releasem(mp)
		return false
	}
	releasem(mp)
	return true
}