graph_signal_handler.h

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#ifndef HEDGEHOG_GRAPH_SIGNAL_HANDLER_H
#define HEDGEHOG_GRAPH_SIGNAL_HANDLER_H
#pragma  once

#include <csignal>
#include <cstring>

#include "../../hedgehog.h"
namespace hh {
template<class GraphOutput, class ... GraphInputs>
class GraphSignalHandler {
 private:
  static Graph<GraphOutput, GraphInputs...>
      *graphInstance_; 
  static bool
      signalHandled_; 

  static ColorScheme colorScheme; 
  static StructureOptions structureOptions; 
  static DebugOptions debugOptions; 

 public:
  static void handleSignal(int signum = SIGTERM) {
#ifdef _WIN32
    std::string signalString(std::to_string(signum));
#else
    std::string signalString(strsignal(signum));
#endif

    if (!signalHandled_) {
      signalHandled_ = true;
      std::cout << "signal caught: " << signum << ": (" << signalString << ")" << std::endl;
      graphInstance_->createDotFile(
          signalString + "-graph-output.dot", colorScheme, structureOptions, debugOptions);
    }
  }

  static void atExit() {
    if (graphInstance_)
      graphInstance_->createDotFile("Exit-graph-output.dot");
  }

  static void setColorScheme(ColorScheme scheme) {
    colorScheme = scheme;
  }

  static void setStructureOptions(StructureOptions options) {
    structureOptions = options;
  }

  static void setDebugOptions(DebugOptions options) {
    debugOptions = options;
  }

  static void registerGraph(Graph<GraphOutput, GraphInputs...> *graph) {
    graphInstance_ = graph;
  }

  static void registerSignal(int signum = SIGTERM, bool atExit = false) {
    std::signal(signum, GraphSignalHandler<GraphOutput, GraphInputs ...>::handleSignal);
    if (atExit) {
      std::atexit(GraphSignalHandler<GraphOutput, GraphInputs ...>::atExit);
    }
  }
};

template<class GraphOutput, class ... GraphInputs>
bool GraphSignalHandler<GraphOutput, GraphInputs...>
    ::signalHandled_ = false; 

template<class GraphOutput, class ... GraphInputs>
Graph<GraphOutput, GraphInputs...> *GraphSignalHandler<GraphOutput, GraphInputs...>
    ::graphInstance_ = nullptr; 


template<class GraphOutput, class ... GraphInputs>
ColorScheme GraphSignalHandler<GraphOutput, GraphInputs...>
    ::colorScheme = ColorScheme::EXECUTION; 

template<class GraphOutput, class ... GraphInputs>
StructureOptions GraphSignalHandler<GraphOutput, GraphInputs...>
    ::structureOptions = StructureOptions::ALL; 

template<class GraphOutput, class ... GraphInputs>
DebugOptions GraphSignalHandler<GraphOutput, GraphInputs...>
    ::debugOptions = DebugOptions::DEBUG; 


}
#endif //HEDGEHOG_GRAPH_SIGNAL_HANDLER_H