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Process.st
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1991-09-12
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"======================================================================
|
| Process Method Definitions
|
======================================================================"
"======================================================================
|
| Copyright (C) 1990, 1991 Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of GNU Smalltalk.
|
| GNU Smalltalk is free software; you can redistribute it and/or modify it
| under the terms of the GNU General Public License as published by the Free
| Software Foundation; either version 1, or (at your option) any later version.
|
| GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
| details.
|
| You should have received a copy of the GNU General Public License along with
| GNU Smalltalk; see the file COPYING. If not, write to the Free Software
| Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
======================================================================"
"
| Change Log
| ============================================================================
| Author Date Change
| sbyrne 19 Sep 89 Converted to use real method categories
|
| sbyrne 25 Apr 89 created.
|
"
Link subclass: #Process
instanceVariableNames: 'suspendedContext priority myList'
classVariableNames: ''
poolDictionaries: ''
category: nil.
Process comment:
'I represent a unit of computation. My instances are independantly
executable blocks that have a priority associated with them, and they
can suspend themselves and resume themselves however they wish.' !
!Process class methodsFor: 'basic'!
on: aBlock at: aPriority
^self new onBlock: aBlock at: aPriority
!!
!Process methodsFor: 'basic'!
terminate
| processList priority process |
suspendedContext _ nil.
myList notNil
ifTrue: [myList remove: self.
myList _ nil].
Processor activeProcess == self
ifTrue: [self suspend]
" myList remove: self"
!!
!Process methodsFor: 'accessing'!
priority
^priority
!
priority: anInteger
priority _ anInteger
!!
!Process methodsFor: 'private'!
onBlock: aBlock at: aPriority
suspendedContext _ aBlock.
priority _ aPriority
!!