Issue 3834 in pharo: Add support for Threaded VMs in Process

Status: Accepted
Owner: [hidden email]
Labels: Milestone-1.3 Type-RequestForEnhancement Importance-High

New issue 3834 by [hidden email]: Add support for Threaded VMs in  
Process
http://code.google.com/p/pharo/issues/detail?id=3834

By Eliot:

  To enable threading you have to modify the Process class definition to  
include threadId as its fourth inst var and tell the VM of that fact by  
setting a bit in the image via vmParameterAt: (the below, also attached).

Link subclass: #Process
instanceVariableNames: 'suspendedContext priority myList threadId  
errorHandler name island env'
classVariableNames: ''
poolDictionaries: ''
category: 'Kernel-Processes'!

SmalltalkImage methods for system attributes
processHasThreadIdInstVar: aBoolean
"The threaded VM needs to know if the 4th inst var of Process
is threadId which it uses to control process-to-thread binding.
This flag persists across snapshots, stored in the image header."
aBoolean ifTrue: [self assert: (Process instVarNames at: 4) ='threadId'].
self vmParameterAt: 48 put: ((self vmParameterAt: 48) bitClear: 1) +  
(aBoolean ifTrue: [1] ifFalse: [0])

e.g.
"Ensure VM knows whether Process has threadId inst var or not."
Smalltalk processHasThreadIdInstVar: (Process instVarNames  
includes: 'threadId').




Attachments:
        SmalltalkImage-processHasThreadIdInstVar.st  585 bytes

Updates:
        Status: Closed

Comment #1 on issue 3834 by [hidden email]: Add support for Threaded  
VMs in Process
http://code.google.com/p/pharo/issues/detail?id=3834

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