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) 1997 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' }"
"{ NameSpace: Smalltalk }"
UnboxedIntegerArray variableSignedLongSubclass:#SignedIntegerArray
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Collections-Arrayed'
!
!SignedIntegerArray class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1997 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
"
SignedIntegerArrays store 32bit signed integers in the range -16r80000000..16r7FFFFFFF.
In contrast to normal arrays (which store pointers to their elements),
signedIntegerArrays store the values in a dense & compact way.
Since the representation fits the underlying C-language systems representation
of signed int32's, this is also useful to pass bulk data to c primitive code.
[memory requirements:]
OBJ-HEADER + (size * 4)
[see also:]
ByteArray BooleanArray FloatArray DoubleArray Array
SignedWordArray WordArray IntegerArray LongIntegerArray
SignedLongIntegerArray
[author:]
Claus Gittinger
"
! !
!SignedIntegerArray class methodsFor:'queries'!
elementByteSize
"for bit-like containers, return the number of bytes stored per element.
Here, 4 is returned"
^ 4
"Created: / 15-09-2011 / 14:11:46 / cg"
!
maxVal
"the maximum value which can be stored in instances of me.
For SignedIntegerArrays, this is 2147483647, eg. 16r7FFFFFFF (largest 32bit signed int)"
^ 16r7FFFFFFF
!
minVal
"the minimum value which can be stored in instances of me.
For SignedIntegerArrays, this is -2147483648 eg. -16r80000000 (smallest 32bit signed int)"
^ -16r80000000
! !
!SignedIntegerArray class methodsFor:'documentation'!
version
^ '$Header$'
!
version_CVS
^ '$Header$'
! !