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). 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>