From 34daa03a2be13f9f38fc29336350236a3e9f541e Mon Sep 17 00:00:00 2001
From: Szczepan Zalega <szczepan@nitrokey.com>
Date: Tue, 28 Feb 2017 17:32:47 +0100
Subject: Count lifetime instances of device communication exception

Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>
---
 CMakeLists.txt                          |  2 +-
 DeviceCommunicationExceptions.cpp       |  3 +++
 include/DeviceCommunicationExceptions.h | 15 ++++++++++++---
 3 files changed, 16 insertions(+), 4 deletions(-)
 create mode 100644 DeviceCommunicationExceptions.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d0bc1f8..46f5bee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,7 @@ set(SOURCE_FILES
     NitrokeyManager.cc
     NK_C_API.h
     NK_C_API.cc
-)
+        DeviceCommunicationExceptions.cpp)
 
 IF(UNIX)
 #	add_library(hidapi-libusb STATIC hidapi/libusb/hid.c )
diff --git a/DeviceCommunicationExceptions.cpp b/DeviceCommunicationExceptions.cpp
new file mode 100644
index 0000000..a470a48
--- /dev/null
+++ b/DeviceCommunicationExceptions.cpp
@@ -0,0 +1,3 @@
+#include "DeviceCommunicationExceptions.h"
+
+std::atomic_int DeviceCommunicationException::occurred {0};
diff --git a/include/DeviceCommunicationExceptions.h b/include/DeviceCommunicationExceptions.h
index 78fc625..6d21561 100644
--- a/include/DeviceCommunicationExceptions.h
+++ b/include/DeviceCommunicationExceptions.h
@@ -1,16 +1,24 @@
 #ifndef LIBNITROKEY_DEVICECOMMUNICATIONEXCEPTIONS_H
 #define LIBNITROKEY_DEVICECOMMUNICATIONEXCEPTIONS_H
 
+#include <atomic>
 #include <exception>
+#include <stdexcept>
 #include <string>
-//class DeviceCommunicationException: public std::exception {
-class DeviceCommunicationException: public std::runtime_error{
+
+class DeviceCommunicationException: public std::runtime_error
+{
   std::string message;
+  static std::atomic_int occurred;
 public:
-  DeviceCommunicationException(std::string _msg): runtime_error(_msg), message(_msg){}
+  DeviceCommunicationException(std::string _msg): std::runtime_error(_msg), message(_msg){
+    ++occurred;
+  }
 //  virtual const char* what() const throw() override {
 //    return message.c_str();
 //  }
+  static bool has_occurred(){ return occurred > 0; };
+  static void reset_occurred_flag(){ occurred = 0; };
 };
 
 class DeviceNotConnected: public DeviceCommunicationException {
@@ -28,4 +36,5 @@ public:
   DeviceReceivingFailure(std::string msg) : DeviceCommunicationException(msg){}
 };
 
+
 #endif //LIBNITROKEY_DEVICECOMMUNICATIONEXCEPTIONS_H
-- 
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