From: adam@irvine.com
Subject: Requeue and IN OUT parameters
Date: 4 May 2001 20:28:57 GMT
Date: 2001-05-04T20:28:57+00:00 [thread overview]
Message-ID: <9cv3e9$gul$1@news.netmar.com> (raw)
I have a couple more questions about protected objects. Here's the first
question; the second will be in a separate post.
9.5.4(11) says that if an entry body completes other than by a
requeue, the program returns to the caller and any copy-back of
parameters occurs. What happens to the parameters if the entry
body does a requeue? In this example:
protected PR is
entry E1 (Count : in out integer);
entry E2 (Count : in out integer);
end PR;
protected body PR is
entry E1 (Count : in out integer) when Some_Condition is
begin
if Blah_Blah_Blah then
Count := Count + 1;
requeue E2;
end if;
Do_A_Bunch_Of_Other_Stuff;
end E1;
. . .
In this example, does the effect of the statement "Count := Count + 1"
become lost? Is the value E2 sees the original value of Count, the
incremented value, or implementation-dependent?
(Actually, I believe this question is pertinent to task entries also.)
-- thanks, Adam
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next reply other threads:[~2001-05-04 20:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-04 20:28 adam [this message]
2001-05-05 6:27 ` Requeue and IN OUT parameters Mark Biggar
2001-05-05 22:13 ` Robert A Duff
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