plugins/slice/prefetch.h

/*
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

/**
 * @file prefetch.h
 * @brief Background fetch classes for slice plugin.
 */

#pragma once

#include <map>

#include "ts/ts.h"
#include "Data.h"
#include "Config.h"

/**
 * @brief Represents a single background fetch.
 */
struct BgBlockFetch {
  static bool schedule(Data *const data, int blocknum);

  explicit BgBlockFetch(int blocknum) : m_blocknum(blocknum) {}

  bool       fetch(Data *const data);
  static int handler(TSCont contp, TSEvent event, void * /* edata ATS_UNUSED */);

  /* This is for the actual background fetch / NetVC */
  Stage  m_stream;
  int    m_blocknum;
  TSCont m_cont = nullptr;
};