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).  Transferring  the  generated 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 channel 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>