Continuation.st
author Claus Gittinger <cg@exept.de>
Mon, 20 Sep 2004 16:27:04 +0200
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"
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 COPYRIGHT (c) 2004 by eXept Software AG
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              All Rights Reserved
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 This software is furnished under a license and may be used
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 only in accordance with the terms of that license and with the
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 inclusion of the above copyright notice.   This software may not
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 be provided or otherwise made available to, or used by, any
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 other person.  No title to or ownership of the software is
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 hereby transferred.
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"
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"{ Package: 'stx:libbasic' }"
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Object subclass:#Continuation
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	instanceVariableNames:'process id suspendContext'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'Kernel-Processes'
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!
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!Continuation class methodsFor:'documentation'!
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copyright
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"
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 COPYRIGHT (c) 2004 by eXept Software AG
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              All Rights Reserved
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 This software is furnished under a license and may be used
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 only in accordance with the terms of that license and with the
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 inclusion of the above copyright notice.   This software may not
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 be provided or otherwise made available to, or used by, any
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 other person.  No title to or ownership of the software is
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 hereby transferred.
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"
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!
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documentation
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    Initial attempt - Contnuations do not work yet.
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    [Instance variables:]
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        id                     <SmallInteger>   a unique continuation-id;
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                                                Used to identify a corresponding 
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                                                data-structure in the VM.
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        process                <Process>        the process which created this continuation.
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    [Class variables:]
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    [see also:]
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        Process Context Block
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    [author:]
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        Claus Gittinger
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"
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! !
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!Continuation class methodsFor:'instance creation'!
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new
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    |cont id|
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    cont := super new.
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%{
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    int __cId;
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    extern int __continuationCreate();
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    __cId = __continuationCreate(cont);
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    if (__cId) {
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        id = __MKSMALLINT(__cId);
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    }
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%}.
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    id isNil ifTrue:[
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        self error:'could not create continuation' mayProceed:true.
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        ^ nil.
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    ].
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    cont setId:id process:(Processor activeProcess).
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    ^ cont
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! !
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!Continuation methodsFor:'private accessing'!
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setId:idArg process:aProcess
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    id := idArg.
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    process := aProcess.
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! !
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!Continuation class methodsFor:'documentation'!
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version
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    ^ '$Header: /cvs/stx/stx/libbasic/Continuation.st,v 1.5 2004-09-20 14:27:04 cg Exp $'
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! !