--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BackgroundQueueProcessingJob.st	Fri Jul 01 15:21:58 2011 +0200
@@ -0,0 +1,108 @@
+"
+ 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:libtool' }"
+
+"{ NameSpace: Tools }"
+
+BackgroundJob subclass:#BackgroundQueueProcessingJob
+	instanceVariableNames:'queue queueAccessLock'
+	classVariableNames:''
+	poolDictionaries:''
+	category:'Interface-CodeView'
+!
+
+!BackgroundQueueProcessingJob 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.
+"
+! !
+
+!BackgroundQueueProcessingJob class methodsFor:'instance creation'!
+
+new
+    "return an initialized instance"
+
+    ^ self basicNew initialize.
+! !
+
+!BackgroundQueueProcessingJob methodsFor:'adding & removing'!
+
+add: object
+
+    "includes: is not synchronized, but should not harm"
+
+    queueAccessLock critical:[
+        (queue includes: object)
+            ifFalse:[queue add: object].
+        self start].
+
+    "Created: / 28-04-2011 / 20:40:29 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified: / 18-05-2011 / 23:30:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!BackgroundQueueProcessingJob methodsFor:'initialization'!
+
+initialize
+    "Invoked when a new instance is created."
+
+
+    queue := OrderedCollection new.
+    queueAccessLock := RecursionLock new.
+
+    "Modified: / 18-05-2011 / 23:25:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!BackgroundQueueProcessingJob methodsFor:'processing'!
+
+process
+
+    | item |
+
+    [
+	item := nil.	 
+        queueAccessLock critical:
+            [queue isEmpty ifFalse:[item := queue removeFirst]].        
+	item isNil ifFalse:
+	    [self processItem: item].
+	item notNil.
+    ] whileTrue
+
+    "Created: / 28-04-2011 / 20:36:35 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified: / 18-05-2011 / 23:30:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
+processItem: item
+
+    ^job value: item
+
+    "Created: / 28-04-2011 / 20:36:51 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!BackgroundQueueProcessingJob class methodsFor:'documentation'!
+
+version_CVS
+    ^ '$Header: /cvs/stx/stx/libbasic2/BackgroundQueueProcessingJob.st,v 1.1 2011-07-01 13:21:58 cg Exp $'
+!
+
+version_SVN
+    ^ '§Id§'
+! !