[libmicrohttpd] The resuming of a single connection and daemon not coordinate

[钱在晨(二败)]

Hi, 

Is there any situation that in the function resume_suspended_connections(), connection->resuming and connection->suspended are MHD_YES,  but daemon->resuming is MHD_NO?

My program uses one thread to produce data and a callback function in another thread (in the threadpool of libmicrohttpd) to return the produced data. The producing-data thread need wait until new data's coming. So I use  MHD_suspend_connection in the callback function if no data to send and  MHD_resume_connection in the producing-data thread when data is ready. But the program does not work because in the end in the function  resume_suspended_connections(), the daemon->resuming is MHD_NO. In the meanwhile, there is actually a suspended connection in the daemon->suspended_connections_head. I check the status and find that the suspended connection with resuming: MHD_YES and suspended: MHD_YES, but the daemon->resuming is MHD_NO. 

I don't know if I explain the issue clearly. Is it normal or abnormal that daemon->resuming with the value MHD_NO makes a previously suspended connection cannot be resumed?

Best Regards,

Jason