Added comment about ThreadsController lifetime requirements

cms-sw · Sep 3, 2020 · c645fae · c645fae
1 parent cb40a2f
commit c645fae
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/FWCore/Concurrency/interface/setNThreads.h b/FWCore/Concurrency/interface/setNThreads.h
@@ -10,6 +10,8 @@
 #include "FWCore/Concurrency/interface/ThreadsController.h"
 
 namespace edm {
+  //This guarantees that the previous ThreadsController is destroyed before a new one starts
+  // At one time certain TBB control elements required such behavior.
   unsigned int setNThreads(unsigned int iNThreads, unsigned int iStackSize, std::unique_ptr<ThreadsController>& oPtr);
-}
+}  // namespace edm
 #endif /* FWCore_Concurrency_setNThreads_h */