Re: [C400-L] Checking for record locked

["Carsten Flensburg" <flensburg@xxxxxxxxxx>]

Hej Joakim,

- If _Rreadk() fails you could use _Rlocate() option _NO_LOCK to check if
the record exists.

If it does, I would assume that the cause of failure is a record lock. I
don't know for certain if my assumption is correct, but I have not yet had a
situation that has invalidated it.

Best regards,
Carsten Flensburg

----- Original Message ----- 
From: "Svensson, Joakim" <joakim.svensson@xxxxxxxxxxxxx>
To: <c400-l@xxxxxxxxxxxx>
Sent: Wednesday, June 23, 2004 9:42 AM
Subject: [C400-L] Checking for record locked



Hi all!

I didn't get any response to my question 2 weeks ago - perhaps it never
got trough to all of you?

Anyway - to rephrase the question - how do you distinguish between a
record missing and a record locked on a _Rreadk()?


/Joakim

------------------------------------
Joakim Svensson
Technology Services
Capgemini Sweden
------------------------------------

-----Original Message-----
Sent: den 11 juni 2004 13:29

Hi!

I've got a little problem which I cannot figure out how to solve. I have
a _Rreadk which I use to check if there is a record with a specified key
in the database. It's quite normal that there is no record with this
key, but if there is the program will do some additional processing.
I've run into a problem lately where the program misses that there is
this specific record; I believe it has to do with the way I use to check
the I/O-operation. Now I use:

rfb = _Rreadk ((*OQH)->koca2, (*OQH)->bufKOCA2, sizeof (RCA_t),
__KEY_EQ|__NO_LOCK, (*OQH)->keyKOCA2, sizeof(RCA2_k)); if
(rfb->num_bytes != sizeof(RCA_t)) {
/* do something */
}

But what happens if the record does exist but it's locked? Now I have no
way to figure out why the _Rreadk failed. I've been looking at the
XXIOFB.h feedback mechanism but I don't find any useful, same with
errno. In the __XXIOFB_T there is a file_dep_fb_offset which I suppose
contain error code and reason code, but I cannot find any description of
what this pointer is pointing at.

I suppose some of you know how to solve this and perhaps have a
description of the file dependent feedback area.


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