as soon as we report 'can_read' or 'can_write', stop monitoring the
events until the user executes the operation, which will clear these
flags and we resume monitoring.
These interfaces allows generic operations on objects that can store
or provide data, such as a file or a buffer.
With well defined interfaces and events we can create code such as
Efl.Io.Copier, that will link a source with a destination and
progressively copy data as they appear.
Marcel Hollerbach
Xavi Artigas
Daniel Kolesa
Gustavo Sverzut Barbieri