docs(core): Document atomic increment

Issue: #293 Issue: #526 Issue: #531
jupp0r · Nov 12, 2021 · 5b3dc67 · 5b3dc67
1 parent ddf7083
commit 5b3dc67
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/core/src/gauge.cc b/core/src/gauge.cc
@@ -17,9 +17,11 @@ void Gauge::Decrement(const double value) { Change(-1.0 * value); }
 void Gauge::Set(const double value) { value_.store(value); }
 
 void Gauge::Change(const double value) {
+  // C++ 20 will add std::atomic::fetch_add support for floating point types
   auto current = value_.load();
-  while (!value_.compare_exchange_weak(current, current + value))
-    ;
+  while (!value_.compare_exchange_weak(current, current + value)) {
+    // intentionally empty block
+  }
 }
 
 void Gauge::SetToCurrentTime() {