From: visser@shapetc.UUCP (Henk Visser)
Subject: losing terminal data when using task concurrency.
Date: 15 Feb 89 16:18:53 GMT [thread overview]
Message-ID: <343@shapetc.UUCP> (raw)
An ALSYS ADA (vesrion3.2) application on a sun3/50 (SUNOS v3.2) gives me a
problem. A simplified version of the task looks as follows:
begin
OPEN(INPUT_FILE,IN_FILE,"/dev/ttyb");
loop
begin
GET_LINE(INPUT_FILE,INPUT_LINE,LINE_INDEX);
BUFFER.WRITE(INPUT_LINE);
end;
end loop;
end;
The terminal handler buffers the incoming data, so no data should get lost when the rendezvous (BUFFER.WRITE) is executed. But unfortunately I do lose data.
The data is not lost if I replace the BUFFER.WRITE with a delay or something
else. So it looks like that data get lost when the task is suspended during the
rendezvous.
Who can help me to get around this problem?
Please send your mail to ..mcvax!shapetc!visser
Thanks in advance,
Henk Visser
Shape Technical Centre,
The Hague, Holland
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