Store a couple : function name + boolean so you can even provide information on which request is actually processing on a multi request process. 


The benefit of this will be to Identify which one of the request is upon a time slow or not returning result.

Ex: 

{[ req1:0,
req2:1
req3:1
]}

You'll know that req1 hasn't returned any result yet.
With that simple int counter you loose that information, and won't be able to debug easily.