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tcl::chan::core(n) Reflected/virtual channel support tcl::chan::core(n) 





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










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.



  

  
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.

  

  

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

  

  
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 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


reflected channel, tip 219, virtual channel






CATEGORY


Channels






COPYRIGHT


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








  

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