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zero(n) zero(n)
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NAME
zero - Create and manipulate zero channels
SYNOPSIS
package require Tcl
package require memchan
zero
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DESCRIPTION
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 gener-ated generated
ated channel between interpreters is possible 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 starvation of other event sources the events raised by this chan-nel channel
nel type have a configurable delay. This option is set in milliseconds and defaults to 5.
SEE ALSO
fifo, fifo2, memchan, null, random
KEYWORDS
channel, i/o, in-memory channel, null, zero
COPYRIGHT
Copyright (c) 2004 Pat Thoyts <patthoyts@users.sourceforge.net>
Memory channels 2.2 zero(n)
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