Experimental Physics and Industrial Control System
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Thanks Ulrik,
I'm not sure how much time I'm going to be able to spend on this,
and I'm not so familiar with Git that this would be
straightforward in any case.
I'm probably going to take a conservative approach to this and
accept some limitations in the way my IOC behaves.
Thanks to everyone for their suggestions. Cheers,
Phil
Hi,
This rings a bell. A while ago I started to do something like this. My idea was to better support cameras/drivers that want to manage the image memory (and avoid superfluous copies). A callback can be registered and you can decide whether to re-use or free the memory. It does not address the issue of some plugins holding on (forever?) to their latest received image - but I think that's a bit of a naughty behaviour...
The commits are rather old and would need to be rebased on top of the latest ADCore master branch...
https://github.com/ulrikpedersen/ADCore/commit/3e2910680b5d65ffb881304cff49cf568f13e80c and https://github.com/ulrikpedersen/ADCore/commit/db7199a110d203c7712b66ac925145ffb54b5966
Cheers,
Ulrik
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Mark Rivers
Sent: 29 July 2016 17:39
To: 'Michael Davidsaver'; [email protected]; 'Phil Atkin'
Subject: RE: NDArrayPool::alloc failing
Hi Michael,
This is an excellent suggestion.
Phil, this should solve your problem. Your driver will get a callback when the array has been released. You can then do what you want with the buffer pointer, being confident that no plugin is using it. If you want to implement it in NDArrayPool and NDArray you can then issue a pull request on Github.
Mark
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Michael Davidsaver
Sent: Friday, July 29, 2016 9:37 AM
To: [email protected]
Subject: Re: NDArrayPool::alloc failing
On 07/29/2016 09:29 AM, Mark Rivers wrote:
We could add an NDArray::getReferenceCount method. If you have the array reserved and getReferenceCount=1 then you can be sure all the plugins have released it.
A good interface to handle this sort of situation would be for
NDArrayPool::alloc() to accept a callback function pointer to "cleanup"
the user provided buffer when the NDArray ref. count falls to zero.
--
Pixel
Analytics is a limited company registered in England.
Company number: 7747526; Registered office: 93A New Road,
Haslingfield, Cambridge CB23 1LP
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- References:
- NDArrayPool::alloc failing Phil Atkin
- RE: NDArrayPool::alloc failing Mark Rivers
- Re: NDArrayPool::alloc failing Phil Atkin
- RE: NDArrayPool::alloc failing Mark Rivers
- Re: NDArrayPool::alloc failing Michael Davidsaver
- RE: NDArrayPool::alloc failing Mark Rivers
- RE: NDArrayPool::alloc failing ulrik.pedersen
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