Topic Path: Symbol Reference > Classes > TIdIOHandlerStream Class > TIdIOHandlerStream Methods > CheckForDataOnSource Method
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TIdIOHandlerStream.CheckForDataOnSource Method

Determine if data is available in the unbuffered communication layer for the connection.

procedure CheckForDataOnSource(
    ATimeout: Integer = 0
); override;
Parameters 
Description 
ATimeout 
Milliseconds to wait for the connection to become readable, or to return data. 

CheckForDataOnSource is an overridden procedure used to allow inspection of the unbuffered data source for the connection in the IOHandler. 

CheckForDataOnSource is an empty implementation in TIdIOHandlerStream that simply implements the abstract virtual method from the ancestor.

TIdIOHandlerStream.ReadFromSource

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