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zero(n)                                                                                              zero(n)



NAME
       zero - 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 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)