bt_cout_logger.cpp

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#include "behaviortree_cpp_v3/loggers/bt_cout_logger.h"
 
namespace BT
{
std::atomic<bool> StdCoutLogger::ref_count(false);
 
StdCoutLogger::StdCoutLogger(const BT::Tree& tree) : StatusChangeLogger(tree.rootNode())
{
  bool expected = false;
  if (!ref_count.compare_exchange_strong(expected, true))
  {
    throw LogicError("Only one instance of StdCoutLogger shall be created");
  }
}
StdCoutLogger::~StdCoutLogger()
{
  ref_count.store(false);
}
 
void StdCoutLogger::callback(Duration timestamp, const TreeNode& node,
                             NodeStatus prev_status, NodeStatus status)
{
  using namespace std::chrono;
 
  constexpr const char* whitespaces = "                         ";
  constexpr const size_t ws_count = 25;
 
  double since_epoch = duration<double>(timestamp).count();
  printf("[%.3f]: %s%s %s -> %s", since_epoch, node.name().c_str(),
         &whitespaces[std::min(ws_count, node.name().size())],
         toStr(prev_status, true).c_str(), toStr(status, true).c_str());
  std::cout << std::endl;
}
 
void StdCoutLogger::flush()
{
  std::cout << std::flush;
  ref_count = false;
}
 
}   // namespace BT