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
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' }"
ExternalBytes subclass:#UnprotectedExternalBytes
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'System-Support'
!
!UnprotectedExternalBytes class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2006 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
"
This is just a factory to generate ExternalBytes.
There are no instances of this class!!
The difference to ExternalBytes is, that #new: returns unprotected ExternalBytes,
that are not protected from garbage collecteded. ExternalBytes allocated #with new:
are not garbage collected.
[author:]
Stefan Vogel
[see also:]
ExternalBytes
"
! !
!UnprotectedExternalBytes class methodsFor:'instance creation'!
new
"return ExternalBytes"
^ ExternalBytes new
!
new:size
"return unprotected ExternalBytes"
^ ExternalBytes unprotectedNew:size
! !
!UnprotectedExternalBytes class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libbasic/UnprotectedExternalBytes.st,v 1.2 2014-02-05 17:18:22 cg Exp $'
! !