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) 2002 by eXept Software AG
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' }"
ControlRequest subclass:#AbortAllOperationRequest
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Kernel-Exceptions-Control'
!
!AbortAllOperationRequest class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2002 by eXept Software AG
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.
"
!
documentation
"
Raised by some dialogs 'Cancel All' button.
If unhandled, this is equivalent to raising the AbortOperationRequest.
However, some applications catch this signal when performing an operation
on multiple objects (such as a fileBrowser, when deleting multiple files).
In these situations, Abort is typically caught to cancel a single
operation, while AbortAll is used to cancel the whole action.
"
! !
!AbortAllOperationRequest class methodsFor:'initialization'!
initialize
NotifierString := 'abort all operations requested'.
"
self initialize
"
! !
!AbortAllOperationRequest class methodsFor:'special handling'!
handleAndAnswerQueryIn:aBlock
"evaluate aBlock, and return immediately, if the AbortAllRequest is raised.
Answer any query if AllOperationWanted with true."
self handle:[:ex |
] do:[
AbortAllOperationWantedQuery
answer:true
do:aBlock
].
"
AbortAllOperationRequest handleAndAnswerQueryIn:[
AbortAllOperationWantedQuery query ifTrue:[
self halt.
AbortAllOperationRequest raise.
].
].
"
"Created: / 09-02-2011 / 13:58:01 / cg"
! !
!AbortAllOperationRequest class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libbasic/AbortAllOperationRequest.st,v 1.9 2013-01-24 15:24:00 cg Exp $'
!
version_CVS
^ '$Header: /cvs/stx/stx/libbasic/AbortAllOperationRequest.st,v 1.9 2013-01-24 15:24:00 cg Exp $'
! !
AbortAllOperationRequest initialize!