NAME

       tcl::chan::fifo2 - In-memory interconnected fifo channels

SYNOPSIS

       package require Tcl  8.5

       package require TclOO

       package require tcl::chan::events  ?1?

       package require tcl::chan::halfpipe  ?1?

       package require tcl::chan::fifo2  ?1?

       ::tcl::chan::fifo2

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DESCRIPTION

       The  tcl::chan::fifo2  package  provides  a  command creating pairs of channels which live
       purely in memory and are connected to each other in a fifo manner. What is written to  one
       half  of  the  pair  can  be  read  from the other half, in the same order. One particular
       application for this is communication between threads, with one half of the pair moved  to
       the  thread  to talk to.  This is equivalent to the fifo2 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.

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

API

       ::tcl::chan::fifo2
              This  command  creates  a  new  connected  pair  of fifo channels and returns their
              handles, as a list containing two elements.

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
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments can
       be made by going to the Edit form of the ticket immediately after its creation,  and  then
       using the left-most button in the secondary navigation bar.

KEYWORDS

       connected  fifos,  fifo, in-memory channel, inter-thread communication, reflected channel,
       tip 219, virtual channel

CATEGORY

       Channels

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>