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| zero(n) | zero(n) |
NAME
zero - Create and manipulate zero channelsSYNOPSIS
package require Tclpackage 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). 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, randomKEYWORDS
channel, i/o, in-memory channel, null, zeroCOPYRIGHT
Copyright (c) 2004 Pat Thoyts <patthoyts@users.sourceforge.net>
| 2.2 | Memory channels |
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