func: void qemu_coroutine_adjust_pool_size(int n)
  
  {
  
      qemu_mutex_lock(&pool_lock);
  
  
  
      pool_max_size += n;
  
  
  
      /* Callers should never take away more than they added */
  
      assert(pool_max_size >= POOL_DEFAULT_SIZE);
  
  
  
      /* Trim oversized pool down to new max */
  
      while (pool_size > pool_max_size) {
  
          Coroutine *co = QSLIST_FIRST(&pool);
  
          QSLIST_REMOVE_HEAD(&pool, pool_next);
  
          pool_size--;
  
          qemu_coroutine_delete(co);
  
      }
  
  
  
      qemu_mutex_unlock(&pool_lock);
  
  }
  