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src/cpp/common/completion_queue_cc.cc

@@ -43,6 +43,10 @@ namespace grpc {
 
 static internal::GrpcLibraryInitializer g_gli_initializer;
 
+// 'CompletionQueue' constructor can safely call GrpcLibraryCodegen(false) here
+// i.e not have GrpcLibraryCodegen call grpc_init(). This is because, to create
+// a 'grpc_completion_queue' instance (which is being passed as the input to
+// this constructor), one must have already called grpc_init().
 CompletionQueue::CompletionQueue(grpc_completion_queue* take)
     : GrpcLibraryCodegen(false), cq_(take) {
   InitialAvalanching();