Transcript is not thread-safe???
jchludzinski at worldkey.net
jchludzinski at worldkey.net
Sat Oct 28 04:26:20 UTC 2000
Ned Konz wrote:
>The Transcript is not thread-safe, for one thing; for another, you
>make the UI run every time you send stuff to the Transcript (at
>least when you do an endEntry).
It was suggested by someone on this mailing list months ago that I
add & change TranscriptStream as follows,
1) add AccessSema as a class variable:
WriteStream subclass: #TranscriptStream
instanceVariableNames: ''
classVariableNames: 'AccessSema '
poolDictionaries: ''
category: 'Collections-Streams'
2) change #endEntry to:
endEntry
self semaphore
critical:
[self changed: #appendEntry.
self reset]
and
3) add:
semaphore
^ AccessSema
ifNil: [AccessSema _ Semaphore forMutualExclusion]
This seems to have work (at least for me!).
---John
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