add a .clang-format file (#9154)

src/concurrency/Lock.h

@@ -2,33 +2,31 @@
 
 #include "../freertosinc.h"
 
-namespace concurrency
-{
+namespace concurrency {
 
 /**
  * @brief Simple wrapper around FreeRTOS API for implementing a mutex lock
  */
-class Lock
-{
-  public:
-    Lock();
+class Lock {
+public:
+  Lock();
 
-    Lock(const Lock &) = delete;
-    Lock &operator=(const Lock &) = delete;
+  Lock(const Lock &) = delete;
+  Lock &operator=(const Lock &) = delete;
 
-    /// Locks the lock.
-    //
-    // Must not be called from an ISR.
-    void lock();
+  /// Locks the lock.
+  //
+  // Must not be called from an ISR.
+  void lock();
 
-    // Unlocks the lock.
-    //
-    // Must not be called from an ISR.
-    void unlock();
+  // Unlocks the lock.
+  //
+  // Must not be called from an ISR.
+  void unlock();
 
-  private:
+private:
 #ifdef HAS_FREE_RTOS
-    SemaphoreHandle_t handle;
+  SemaphoreHandle_t handle;
 #endif
 };