zero(n)zero(n)______________________________________________________________________________NAMEzero - Create and manipulate zero channels
SYNOPSIS
package require Tcl
package require memchan
zero_________________________________________________________________DESCRIPTION
The command described here is only available in a not-yet released ver‐
sion 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 possi‐
ble but does not make much sense.
OPTIONS
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 starva‐
tion of other event sources the events raised by this channel
type have a configurable delay. This option is set in millisec‐
onds and defaults to 5.
SEE ALSO
fifo, fifo2, memchan, null, random
KEYWORDS
channel, i/o, in-memory channel, null, zeroCOPYRIGHT
Copyright (c) 2004 Pat Thoyts <patthoyts@users.sourceforge.net>
Memory channels 2.2 zero(n)
