Locking needs to be done on segments that contain callback functions that
are called from outside of your application.
Regards,
Jan Slodicka
Resco, Palm Division
----- Original Message -----
From: "G. Kalyana Sundaram" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[email protected]>
Sent: Saturday, March 04, 2006 11:20 AM
Subject: RE: Random Crashes with NVFS - need help with locking and
protecting app
Hi Ben,
Thanks for the early reply. It would be very kind of you if you could
provide suggestions on the locking I perform. Should I lock all code
segments and protect or just the first segment?
Thanks in advance.
Regards,
G. Kalyana Sundaram
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ben Combee
Sent: Saturday, March 04, 2006 2:55 PM
To: Palm Developer Forum
Subject: Re: Random Crashes with NVFS - need help with locking and
protecting app
On 3/3/06, G. Kalyana Sundaram <[EMAIL PROTECTED]> wrote:
> Our app is crashing randomly with NVFS systems. The app is spanning across
> multiple segments, running in background. In background mode – the app
uses
> only code from segment 1 and makes calls to libraries. Also we read data
> from databases in background mode – we use DmQueryRecord, get a handle and
> lock it till the read is done. We also perform some file writing in
> background (mainly for logs) – for each write – we open, write and close
it
> immediately.
If you need to make sure the handle will stick around, don't use
DmQueryRecord but use DmGetRecord/DmReleaseRecord. On pre 5.4.9
devices, the OS doesn't know when you're done with a
DmQueryRecord-obtained item, so it can throw it out of memory before
you've completed your work.
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