check -- Check Data Source Liveness


proc ::providerName::check sourceId { ... }


The check proc can be called once a data source has been started. The sourceId parameter is the value of the sourceid dict element passed to the start command.

This command should return a boolean true value if the data source identified by sourceId is still running or a boolean false value if the data source is no longer running. Boolean values are those accepted by the C function Tcl_GetBoolean.