Function get_os_thread_info

sql/threadpool_common.cc:183–189

static thread_local OS_thread_info os_thread_info;

static const OS_thread_info *get_os_thread_info()
{
  auto *res= &os_thread_info;
  if (!res->initialized())
    res->init();
  return res;
}

/*
  Attach/associate the connection with the OS thread,