Fix unlikely but possible race in `WeakValueDictionary`
It may happen that value in `valueArray` could have been already
collected by the GC but #clearDeadSlots have not yet been called.
When this happened, `#at:ifAbsentPut:` returned tombstone rather
than updating the dictionary with value from block.
This commit fixes this by checking whether `valueArray` contain
the tombstone and if so, clearing up the dead slots and restarting
the operation. HTH.
"
COPYRIGHT (c) 2006 by eXept Software AG
COPYRIGHT (c) 2009 Jan Vrany
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libbasic' }"
AbstractDesktop subclass:#UnixDesktop
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'System-Desktop'
!
!UnixDesktop class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2006 by eXept Software AG
COPYRIGHT (c) 2009 Jan Vrany
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
! !
!UnixDesktop class methodsFor:'accessing'!
priority
^1
"Modified: / 11-08-2009 / 16:40:06 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop class methodsFor:'accessing - defaults'!
defaultEditorCommand
^ (OperatingSystem getEnvironment: 'VISUAL')
ifNil: [ (OperatingSystem getEnvironment: 'EDITOR') ]
"Created: / 11-08-2009 / 16:53:52 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop class methodsFor:'testing'!
isAvailable
^OperatingSystem isUNIXlike
"Modified: / 11-08-2009 / 16:40:30 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop methodsFor:'accessing - commands'!
editorCommand
^UserPreferences current editorCommand
ifNil:[self class defaultEditorCommand]
"
Desktop editorCommand
"
"Created: / 11-08-2009 / 17:32:42 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop methodsFor:'operations'!
edit: filenames
"
Opens desktop's preferred editor on given filenames.
filenames - a String or Filename or collection of those.
"
^self execute: self editorCommand filenames: filenames
"
Desktop edit: '/home/janfrog/.emacs'
"
"Created: / 11-08-2009 / 17:35:57 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop methodsFor:'operations - private'!
execute: command filenames: filenames
| filenamesAsStrings placeholders |
filenamesAsStrings := (self toArrayOfFilenames: filenames) collect:[:f|f asString].
placeholders := Dictionary new.
placeholders
at: 'f' put: (filenamesAsStrings asStringWith: Character space);
at: 'F' put: filenamesAsStrings first.
^self execute: command placeholders: placeholders.
"Created: / 11-08-2009 / 17:40:10 / Jan Vrany <vranyj1@fel.cvut.cz>"
!
execute: command placeholders: placeholders
^OperatingSystem
executeCommand:(command expandPlaceholdersWith: placeholders)
"
Desktop edit: '/home/janfrog/.emacs'
"
"Created: / 11-08-2009 / 17:41:45 / Jan Vrany <vranyj1@fel.cvut.cz>"
! !
!UnixDesktop class methodsFor:'documentation'!
version_CVS
^ '$Header: /cvs/stx/stx/libbasic/UnixDesktop.st,v 1.1 2011-06-28 10:10:03 vrany Exp $'
!
version_SVN
^ ' Id: UnixDesktop.st 10517 2010-04-26 18:26:38Z vranyj1 '
! !