func: void qemu_coroutine_delete(Coroutine *co_)
  
  {
  
      CoroutineThreadState *s = coroutine_get_thread_state();
  
      CoroutineUContext *co = DO_UPCAST(CoroutineUContext, base, co_);
  
  
  
      if (s->pool_size < POOL_MAX_SIZE) {
  
          QLIST_INSERT_HEAD(&s->pool, &co->base, pool_next);
  
          co->base.caller = NULL;
  
          s->pool_size++;
  
          return;
  
      }
  
  
  
      g_free(co->stack);
  
      g_free(co);
  
  }
  