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    Command:

    zero

    
    
    

    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).
                  Transferring the generated channel between interpreters is  pos-
                  sible 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, zero
    
    
    

    COPYRIGHT

           Copyright (c) 2004 Pat Thoyts <patthoyts@users.sourceforge.net>
    
    
    

    Memory channels 2.2 zero(3tcl)

    
    
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