allow multiple instances ofthe loggers

Author: facontidavide

include/behaviortree_cpp/loggers/bt_cout_logger.h

@@ -13,8 +13,6 @@ namespace BT
 
 class StdCoutLogger : public StatusChangeLogger
 {
-  static std::atomic<bool> ref_count;
-
 public:
   StdCoutLogger(const BT::Tree& tree);
   ~StdCoutLogger() override;

include/behaviortree_cpp/loggers/bt_minitrace_logger.h

@@ -8,8 +8,6 @@ namespace BT
 {
 class MinitraceLogger : public StatusChangeLogger
 {
-  static std::atomic<bool> ref_count;
-
 public:
   MinitraceLogger(const BT::Tree& tree, const char* filename_json);
 

src/loggers/bt_cout_logger.cpp

@@ -2,20 +2,11 @@
 
 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)
@@ -35,7 +26,6 @@ void StdCoutLogger::callback(Duration timestamp, const TreeNode& node,
 void StdCoutLogger::flush()
 {
   std::cout << std::flush;
-  ref_count = false;
 }
 
 }  // namespace BT

src/loggers/bt_minitrace_logger.cpp

@@ -6,17 +6,10 @@
 
 namespace BT
 {
-std::atomic<bool> MinitraceLogger::ref_count(false);
 
 MinitraceLogger::MinitraceLogger(const Tree& tree, const char* filename_json)
   : StatusChangeLogger(tree.rootNode())
 {
-  bool expected = false;
-  if(!ref_count.compare_exchange_strong(expected, true))
-  {
-    throw LogicError("Only one instance of MinitraceLogger shall be created");
-  }
-
   mtr_register_sigint_handler();
   mtr_init(filename_json);
   this->enableTransitionToIdle(true);
@@ -26,7 +19,6 @@ MinitraceLogger::~MinitraceLogger()
 {
   mtr_flush();
   mtr_shutdown();
-  ref_count = false;
 }
 
 const char* toConstStr(NodeType type)