/usr/share/gnu-smalltalk/examples/Timer.st is in gnu-smalltalk-common 3.2.4-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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| Handy Timer object for establishing periodic activities
|
|
======================================================================"
"======================================================================
|
| Copyright 1988-92, 1994-95, 1999, 2000 Free Software Foundation, Inc.
| Written by Paolo Bonzini.
|
| 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 2, 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
======================================================================"
Object subclass: #Timer
instanceVariableNames: 'period doBlock stopBlock atStopBlock process '
classVariableNames: ''
poolDictionaries: ''
category: 'Examples-Processes'!
!Timer methodsFor: 'accessing'!
atStopBlock
^atStopBlock
!
atStopBlock: aBlock
atStopBlock := aBlock
!
doBlock
^doBlock
!
doBlock: aValue
doBlock := aValue
!
processPriority
^Processor userSchedulingPriority
!
stopBlock
^stopBlock
!
stopBlock: aValue
stopBlock := aValue
!
period
^period
!
period: aValue
period := aValue
! !
!Timer methodsFor: 'actions'!
resume
process isNil ifFalse: [ process resume. ].
!
start
process isNil ifFalse: [ ^self ].
process := [ [ self stopBlock value ]
whileFalse: [
(Delay forMilliseconds: self period) wait.
doBlock value ].
self atStopBlock isNil ifFalse: [ self atStopBlock value ].
process := nil
] forkAt: self processPriority
!
stop
process isNil ifFalse: [ process terminate. ].
process := nil.
!
suspend
process isNil ifFalse: [ process suspend. ].
! !
!Timer class methodsFor: 'instance-creation'!
every: milliseconds do: aBlock stopWhen: anotherBlock
^self new
period: milliseconds;
doBlock: aBlock;
stopBlock: anotherBlock;
start;
yourself
!
every: milliseconds do: aBlock stopWhen: anotherBlock afterStopDo: stopBlock
^self new
period: milliseconds;
doBlock: aBlock;
stopBlock: anotherBlock;
atStopBlock: stopBlock;
start;
yourself
! !
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