refactored threading-related classes, code broken

src/concurrency/Lock.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "freertosinc.h"
+
+namespace concurrency {
+
+// Simple wrapper around FreeRTOS API for implementing a mutex lock.
+class Lock
+{
+  public:
+    Lock();
+
+    Lock(const Lock &) = delete;
+    Lock &operator=(const Lock &) = delete;
+
+    /// Locks the lock.
+    //
+    // Must not be called from an ISR.
+    void lock();
+
+    // Unlocks the lock.
+    //
+    // Must not be called from an ISR.
+    void unlock();
+
+  private:
+    SemaphoreHandle_t handle;
+
+};
+
+} // namespace concurrency