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From: blackje%sungod.tcpip@GE-CRD.ARPA
Newsgroups: comp.lang.ada
Subject: RE: Re: Help me to solve this problem!
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Date: Mon, 31-Aug-87 20:46:00 EDT
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Posted: Mon Aug 31 20:46:00 1987
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Date: Mon, 31 Aug 87 19:45:10 EDT
From: emmett black <blackje@sungod>
Posted-Date: Mon, 31 Aug 87 19:45:10 EDT
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To: info-ada@ada20.isi.edu
Subject: RE: Re: Help me to solve this problem!


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>From STRICKLER%SCOVCB.decnet@csbvax.steinmetz Mon Aug 31 13:31:03 1987
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Date: 31 Aug 87 13:28 EST
From: STRICKLER%SCOVCB.decnet@csbvax.steinmetz
Subject: RE: Re: Help me to solve this problem!

I have not had the time to review the problem in detail, however,
I will throw out a comment which may shed some light on the problem.

Input/output operations on VAX Ada files take place sequentially
(see Programmer's Runtime Reference Manual section 2.7). Thus, if
two tasks request I/O to the same file, the second task will wait
until all previous I/O on that file is completed. 

Although I do not know for sure, VAX Ada probably treats the terminal
as a "file" and, if it does, a write can not take place while a read
is pending.


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