Transcript problems!
jchludzinski at worldkey.net
jchludzinski at worldkey.net
Fri Dec 1 08:58:16 UTC 2000
To avoid having multiple Processes concurrently writing (#show:) to
the Transcript, I have an class (#StringPump) with an instance of
SharedQueue on which the Processes place Strings (using #nextPut:).
A separate Process (part of #StringPump) retrieves the Strings
(using #next) and writes the String to the Transcript:
run
| nextValue |
[true]
whileTrue:
[nextValue _ self sharedQ next.
Transcript cr; show: nextValue]
This resulted in an error with the following call stack:
MessageNotUnderstood: stringIndex
UndefinedObject(Object)>>doesNotUnderstand:
TextMorphEditor(ParagraphEditor)>>selectionInterval
PluggableTextMorph>>scrollSelectionIntoView:
PluggableTextMorph>>scrollSelectionIntoView
PluggableTextMorph>>handleEdit:
PluggableTextMorph>>update:
[] in TranscriptStream(Object)>>changed:
Array(SequenceableCollection)>>do:
TranscriptStream(Object)>>changed:
TranscriptStream>>endEntry
TranscriptStream>>show:
StringPump>>run
[] in StringPump class>>new:
[] in BlockContext>>newProcess
Any suggestions on how I can have multiple threads write to the
Transcript (concurrently) - without problems? I have also seen
another error concerning indices and #endEntry.
---John
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