get_id

Returns the numeric ID for a particular source.

The ID of a source is a positive integer which is unique within a particular main loop context. The reverse mapping from ID to source is done by find_source_by_id.

You can only call this function while the source is associated to a MainContext instance; calling this function before attach or after destroy yields undefined behavior. The ID returned is unique within the MainContext instance passed to attach.

Parameters:

this	a SignalSource

Returns:

the ID (greater than 0) for the source