make members atomic

include/drive.h

@@ -14,7 +14,7 @@ class Drive
 {
 
 public:
-    enum TaskState
+    enum class TaskState
     {
         NONE,
         SHRED_SELECTED,
@@ -23,15 +23,15 @@ public:
         DELETE_SELECTED,
         DELETE_ACTIVE,
         FROZEN
-    } state;
+    };
 
-    enum ConnectionType
+    enum class ConnectionType
     {
         UNKNOWN,
         USB,
         SATA,
         NVME
-    } connectionType;
+    };
 
     struct
     {
@@ -41,6 +41,9 @@ public:
         unsigned long ulSpeedMetricBytesWritten;
     } sShredSpeed;
 
+    std::atomic<TaskState> state;
+    std::atomic<ConnectionType> connectionType;
+
     bool bWasShredded = false;     // all shred iterations done
     bool bWasShredStarted = false; // shred was atleast once started
     bool bWasChecked = false;      // all shred iterations and optional checking done