There are several types of Open Server threads. The SRV_T_TYPE thread property indicates the type of thread. An application can retrieve the thread’s type by calling srv_thread_props with property set to SRV_T_TYPE and cmd set to CS_GET.
Table 2-33 identifies the legal thread types:
Value  | 
Thread type  | 
|---|---|
SRV_TCLIENT  | 
A client thread  | 
SRV_TLISTENER  | 
A thread that accepts client connections  | 
SRV_TSITE  | 
A site handler thread  | 
SRV_TSUBPROC  | 
A remote server connection over a site handler thread  | 
SRV_TSERVICE  | 
A service thread  |