zero -
Create and manipulate zero channels
package require Tcl
package require memchan
zero
The command described here is only available in a not-yet released
version of the package. Use the CVS to get the sources.
-
zero
-
creates a zero channel which absorbs everything written into
it. Reading from a zero channel will return the requested number of null
bytes. These channels are essentially Tcl-specific variants of the
zero device for unixoid operating systems (/dev/zero). Transfering the
generated channel between interpreters is possible but does not make
much sense.
Memory channels created by
zero provide one additional option to
set or query.
- -delay ? milliseconds ?
-
A zero channel is always writable and readable. This means
that all fileevent-handlers will fire continuously. To
avoid starvation of other event sources the events raised by this
channel type have a configurable delay. This option is set in
milliseconds and defaults to 5.
memchan, fifo, fifo2, null, random
zero, null, in-memory channel, channel, i/o