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tcl::chan::memchan(n) 1 tcllib "Reflected/virtual channel support"


tcl::chan::memchan - In-memory channel

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  • package require Tcl 8.5
  • package require TclOO
  • package require tcl::chan::events ?1?
  • package require tcl::chan::memchan ?1?


The tcl::chan::memchan package provides a command creating channels which live purely in memory. They provide random-access, i.e. are seekable. This is equivalent to the memchan channels provided by the package Memchan, except that this is written in pure Tcl, not C. On the other hand, Memchan is usable with Tcl 8.4 and before, whereas this package requires Tcl 8.5 or higher, and TclOO.

Packages related to this are tcl::chan::string and tcl::chan::variable.

The internal TclOO class implementing the channel handler is a sub-class of the tcl::chan::events framework.



This command creates a new memchan channel and returns its handle.

Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category virtchannel of the Tcllib Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.


in-memory channel, reflected channel, tip 219, virtual channel