Indicates if socket handles are avaiable for reading.
function SelectRead( const ATimeout: Integer = IdTimeoutInfinite ): Boolean; virtual; abstract;
Boolean - True when a socket handle is available for reading.
SelectRead is an abstract virtual Boolean function that specifies the method used to access the Select() API for a protocol stack implementation.
SelectRead is a convenience method used to indicate if there are readable socket handles for the protocol stack. SelectRead returns True when the list of socket handles ready for reading would contain a positive non-zero value.
ATimeout indicates the number of milliseconds to wait for successful completion of the Select() API call.
SelectRead must be implemented in a descendant class using the protocol stack and list implementation for a specific operating system or platform.
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