Re: [QUESTION] llist: Comment releasing 'must delete' restriction before traversing

From: Huang\, Ying
Date: Tue Jul 31 2018 - 01:46:03 EST


Byungchul Park <byungchul.park@xxxxxxx> writes:

> On Tue, Jul 31, 2018 at 09:37:50AM +0800, Huang, Ying wrote:
>> Byungchul Park <byungchul.park@xxxxxxx> writes:
>>
>> > Hello folks,
>> >
>> > I'm careful in saying.. and curious about..
>> >
>> > In restrictive cases like only addtions happen but never deletion, can't
>> > we safely traverse a llist? I believe llist can be more useful if we can
>> > release the restriction. Can't we?
>> >
>> > If yes, we may add another function traversing starting from a head. Or
>> > just use existing funtion with head->first.
>> >
>> > Thank a lot for your answers in advance :)
>>
>> What's the use case? I don't know how it is useful that items are never
>> deleted from the llist.
>>
>> Some other locks could be used to provide mutual exclusive between
>>
>> - llist add, llist traverse
>
> Hello Huang,

Hello Byungchul,

> In my use case, I only do adding and traversing on a llist.

Can you provide more details about your use case?

Best Regards,
Huang, Ying

>>
>> and
>>
>> - llist delete
>
> Of course, I will use a lock when deletion is needed.
>
> So.. in the case only adding into and traversing a llist is needed,
> can't we safely traverse a llist in the way I thought? Or am I missing
> something?
>
> Thank you.
>
>> Is this your use case?
>>
>> Best Regards,
>> Huang, Ying