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"
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COPYRIGHT (c) 2010 by Claus Gittinger
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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:libbasic3' }"
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Array variableSubclass:#TraceBuffer
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instanceVariableNames:'accessLock writeIndex'
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classVariableNames:''
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poolDictionaries:''
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category:'System-Debugging-Support'
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!
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!TraceBuffer class methodsFor:'instance creation'!
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new:n
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"return an initialized instance"
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^ (self basicNew:n*2) initialize.
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"Created: / 30-11-2010 / 16:13:25 / cg"
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! !
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!TraceBuffer class methodsFor:'examples'!
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copyright
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"
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COPYRIGHT (c) 2010 by Claus Gittinger
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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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"Created: / 30-11-2010 / 16:21:33 / cg"
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!
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documentation
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"
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simple round robin tracebuffer for system debugging.
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"
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"Created: / 30-11-2010 / 16:21:57 / cg"
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!
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examples
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"
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|buffer|
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buffer := self new:100.
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buffer dumpLast:5 on:Transcript.
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buffer trace:1.
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buffer trace:2.
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buffer trace:3.
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buffer dumpLast:5 on:Transcript.
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buffer trace:4.
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buffer trace:5.
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buffer dumpLast:5 on:Transcript.
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buffer trace:6.
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buffer trace:7.
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buffer trace:8.
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buffer dumpLast:5 on:Transcript.
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"
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"Created: / 30-11-2010 / 16:11:55 / cg"
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! !
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!TraceBuffer methodsFor:'dumping'!
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dumpLast:n on:aStream
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|count idx entry time|
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count := 0.
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idx := writeIndex.
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aStream showCR:'-----------------'.
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[
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[ count <= n ] whileTrue:[
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idx == 0 ifTrue:[
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idx := self size.
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idx == 0 ifTrue:[ ^ self ].
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].
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time := self at:idx.
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entry := self at:idx-1.
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entry isNil ifTrue:[^ self ].
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aStream show:time; show:' '; showCR:entry.
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idx := idx - 2.
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count := count + 1.
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].
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] ensure:[
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aStream showCR:'-----------------'.
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]
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"Created: / 30-11-2010 / 16:10:00 / cg"
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! !
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!TraceBuffer methodsFor:'initialization'!
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initialize
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writeIndex := 0.
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accessLock := Semaphore forMutualExclusion.
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"Created: / 30-11-2010 / 16:06:47 / cg"
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! !
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!TraceBuffer methodsFor:'tracing'!
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trace:something
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accessLock critical:[
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writeIndex == self size ifTrue:[
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writeIndex := 0.
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].
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self at:writeIndex+1 put:something.
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self at:writeIndex+2 put:(OperatingSystem getMicrosecondTime).
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writeIndex := writeIndex + 2.
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].
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"Created: / 30-11-2010 / 16:07:52 / cg"
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! !
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!TraceBuffer class methodsFor:'documentation'!
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version_CVS
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^ '$Header: /cvs/stx/stx/libbasic3/TraceBuffer.st,v 1.1 2010-11-30 15:29:47 cg Exp $'
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! !
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