pipeline.h

/* Copyright 2013-present Barefoot Networks, Inc.
 *
 * Licensed 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.
 */

/*
 * Antonin Bas (antonin@barefootnetworks.com)
 *
 */

//! @file pipeline.h

#ifndef BM_BM_SIM_PIPELINE_H_
#define BM_BM_SIM_PIPELINE_H_

#include <string>

#include "control_flow.h"
#include "named_p4object.h"

namespace bm {

//! Implements a P4 control flow. It essentially consists of a apply() method
//! which is in charge of sending the Packet through the correct match-action
//! tables and conditions.
class Pipeline : public NamedP4Object {
 public:
  Pipeline(const std::string &name, p4object_id_t id,
           ControlFlowNode *first_node)
    : NamedP4Object(name, id), first_node(first_node) {}

  //! Sends the \p pkt through the correct match-action tables and
  //! conditions. Each step is determined based on the result of the previous
  //! step (table lookup or condition evaluation), according to the P4 control
  //! flow graph.
  void apply(Packet *pkt);
  // Start from next_node instead of first_node
  void apply_from_next_node(Packet *pkt);

  //! Deleted copy constructor
  Pipeline(const Pipeline &other) = delete;
  //! Deleted copy assignment operator
  Pipeline &operator=(const Pipeline &other) = delete;

  //! Default move constructor
  Pipeline(Pipeline &&other) /*noexcept*/ = default;
  //! Default move assignment operator
  Pipeline &operator=(Pipeline &&other) /*noexcept*/ = default;

 private:
  ControlFlowNode *first_node;
};

}  // namespace bm

#endif  // BM_BM_SIM_PIPELINE_H_