NAME

       tcl::chan::core - Basic reflected/virtual channel support

SYNOPSIS

       package require Tcl  8.5

       package require TclOO

       package require tcl::chan::core  ?1?

       ::tcl::chan::core objectName

       objectName initialize thechannel mode

       objectName finalize thechannel

       objectName destroy

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DESCRIPTION

       The  tcl::chan::core  package  provides  a  TclOO class implementing common behaviour needed by virtually
       every reflected or virtual channel (initialization, finalization).

       This class expects to be used as either superclass of a concrete channel class, or to be mixed into  such
       a class.

CLASS API

       ::tcl::chan::core objectName
              This command creates a new channel core object with an associated global Tcl command whose name is
              objectName.  This  command may be used to invoke various operations on the object, as described in
              the section for the Instance API.

INSTANCE API

       The API of channel core instances provides only  two  methods,  both  corresponding  to  channel  handler
       commands  (For  reference  see  TIP  219 [http:/tip.tcl.tk/219]). They expect to be called from whichever
       object instance the channel core was made a part of.

       objectName initialize thechannel mode
              This method implements standard behaviour for the initialize method  of  channel  handlers.  Using
              introspection it finds the handler methods supported by the instance and returns a list containing
              their names, as expected by the support for reflected channels in the Tcl core.

              It further remembers the channel handle in an instance variable for access by sub-classes.

       objectName finalize thechannel
              This  method  implements standard behaviour for the finalize method of channel handlers. It simply
              destroys itself.

       objectName destroy
              Destroying the channel core instance closes the channel it was initialized  for,  see  the  method
              initialize.  When  destroyed  from  within  a  call  of  finalize  this does not happen, under the
              assumption that the channel is being destroyed by Tcl.

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     SF     Trackers
       [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you  may
       have for either package and/or documentation.

KEYWORDS

       reflected channel, tip 219, virtual channel

CATEGORY

       Channels

COPYRIGHT

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

virtchannel_core                                        1                                  tcl::chan::core(3tcl)