Scans T-Server for one or more incoming messages and
special events for a time interval specified by the parameter timeout
,
and processes the timers and the pending messages as specified by
the parameter scan_mode
. This function is used to synchronize
with the socket operation while operating in asynchronous mode,
or in synchronous mode when ADDP is used.
Name | Description |
---|---|
server | Local server handle to the T-Server in question. |
timeout | Time interval, in seconds, during which a message from T-Server will be sought. |
scan_mode | The scanning mode. |
>0
—
Number of received messages.
0
—
The timeout is expired.
-1
—
Error condition. Returned to the application
if the request has not been processed due to an incorrect function
statement.
This function does not generate any messages to T-Server.