Program Listing for File istreamports.cpp

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// ---------------------------------------------------------------------
// This file is part of falcon-core.
//
// Copyright (C) 2015, 2016, 2017 Neuro-Electronics Research Flanders
//
// Falcon-server is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Falcon-server is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with falcon-core. If not, see <http://www.gnu.org/licenses/>.
// ---------------------------------------------------------------------

#include <map>
#include <utility>
#include <vector>

#include "istreamports.hpp"
#include "iprocessor.hpp"

void ISlotOut::Connect(ISlotIn *downstream) {
  if (downstream_slots_.count(downstream) == 0) {
    downstream_slots_.insert(downstream);
  } else {
    throw std::runtime_error("Attempting to connect input slot twice.");
  }
}

std::vector<RingSequence *> ISlotOut::gating_sequences() {
  std::vector<RingSequence *> v;
  for (auto &it : downstream_slots_) {
    v.push_back(it->sequence());
  }
  return v;
}

void ISlotIn::ReleaseData() {
  if (nretrieved_ > 0) {
    int64_t value = sequence_.IncrementAndGet(nretrieved_);
    nretrieved_ = 0;

    if (value + 1 < 0) {
      sequence_.set_sequence(INT64_MAX);
    }
  }
}

void ISlotIn::Connect(ISlotOut *upstream) {
  if (connected()) {
    throw std::runtime_error("Error connecting to slot (already connected)");
  }

  upstream_ = upstream;
}

void ISlotIn::NegotiateUpstream() {
  upstream_->parent()->parent()->internal_NegotiateConnections();
}

void ISlotIn::PrepareProcessing() {
  sequence_.set_sequence(-1L);
  ncached_ = 0;
  cache_ = nullptr;
  nretrieved_ = 0;
}

YAML::Node IPortOut::ExportYAML() const {
  YAML::Node node;
  node["datatype"] = datatype();
  node["nslots_min"] = policy().min_slot_number();
  node["nslots_max"] = policy().max_slot_number();
  node["buffer_size"] = policy().buffer_size();
  if (policy().wait_strategy() == WaitStrategy::kBlockingStrategy) {
    node["wait_strategy"] = "blocking";
  } else if (policy().wait_strategy() == WaitStrategy::kSleepingStrategy) {
    node["wait_strategy"] = "sleeping";
  } else if (policy().wait_strategy() == WaitStrategy::kYieldingStrategy) {
    node["wait_strategy"] = "yielding";
  } else {
    node["wait_strategy"] = "busy spin";
  }
  return node;
}

YAML::Node IPortIn::ExportYAML() const {
  YAML::Node node;
  node["datatype"] = datatype();
  node["nslots_min"] = policy().min_slot_number();
  node["nslots_max"] = policy().max_slot_number();
  node["cache"] = policy().cache_enabled();
  node["time_out"] = policy().time_out();
  return node;
}